1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95177a7e745cad0ffbc93c6bf22081c2c3984840c120ff91f8488f266f3ac220. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49f8b8b2-e6f6-47cc-8cdb-dedf9d748a70.json and https://artists.proofprofile.net/proofs/artist/49f8b8b2-e6f6-47cc-8cdb-dedf9d748a70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4bbae96dc9ec46a8ca3dab0e850907b06805e80a76d72786ead7cc2fa75253. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS801732266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3bebcac1997d001c0437aed569f36cf62ee735c1b7a9c30e7add25fc9bdac6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS801732267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889bde77e5e5709806d0dd7e518a8c5faff01099219d8f95f0b9b4dfd817bb54. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:21:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS801732271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82765c16ade67946ae1f250e0f44b8d62a541f6b1ff2bf48cdcbccfaa8662676. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS801732273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0db50f9e12623a98f6304c376b6f052b65366a68c2e96a5f094e1687a93cc3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:29:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPF1789274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8709d7fdab445aa14ae99ffbc4491f17667536f6b8f14b3dae861219e2125. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPG1721750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8709d7fdab445aa14ae99ffbc4491f17667536f6b8f14b3dae861219e2125. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:01:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPG1721750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631157b5544ba4fca74119bc18fe57c5a6305a0b12d8ad5e6019777179b521b7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:01:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101800134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f8a5f20e9d7662fdce39db4e5e87f01df36fec1d7e46527cee0322f612402e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10092a4a902529329ff7dabaf65ce55a8beaf69050cc078e13971e9fae890a7d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dffd3826a5c12ab5d675d1c5bb650729e4fe739ef2e2d455b7329199b288d1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd463952db4625516b8b34d5d29d5cf8c5300f0ced59973836ee0a194607ed902. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8485a08d6442a0c374bbb3bd5e46b0cd18e067f88617a633c0fe5bfe7d0549b6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7449b455bcb481a6c02ad1cca5b35e2dd0857c31bc54229133fbb7a263e10605. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPG101900521.
Cool Cool Cool (feat. Osteoleuco & TOSHIKI HAYASHI (%C))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0a00c7e26c3d9ebcd8cfbe46b5f4ebac9bf768bd8ee4a10ef2e65ee2c7da93. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:08:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPM2029417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be202118bdcb32380340f3452bac66e06c0b23243791de5f0ecca949bcc0a94. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPM2029419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7381d9c9419bf000a055ac7ce4392fa316adc8e096902005965fdf8747597b1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPN2176750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7a12b97b34cbe611c7045062363d1f2cd753a73d17a1ef103e4215aff03214. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2220092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da08eae7d63691500ef0cc5710d057396dc71e311d4f1a3454f92b3efa114fc. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2249121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd245de2eb5a6797f55224c78fb20bf7d5dfad690fd17710ea21bd2be198553ae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2268184.
Jets (feat. 18scott & TOSHIKI HAYASHI (%C))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538cd09c002f0625ea20ba9c58e8ca604bf518bde357d2490a69699ca2f53851. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2291440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842e0415e2d61fc313f986acaa140877597a0c29dcc1204224d8e8f187eff693. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2291450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16e810787c152951f586aa5d84e04343f77951b8b50162230cc549f65fe0cc2. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPR2291447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8131eb8ad73c36e3332e339e76c5cbd17cacdd56f45b2c518b0e101ee3f49a15. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPW2366212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd19af4f446cb6f4263a01a69dabf42e7b78ca9fcc0d70593bf7310292f3e7d9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPW2373233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4497554e66f9abbb0176c4cf9e1750d76643de60f3c67c3dfd02df6483f1cea2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPY2325647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550a4f220c99f01b2fad2a0fabcecccb86423a2cea26a29accb21ee7ec7c753b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB2491031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91163c0ddadefea3c7105c73f51447c9d39c43645161def6a28c15b30cc284cf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2468957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0308ddd3a512fcd5fc2e18973cf004e0660ce22d84c9bd397255390e0177794. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2468960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6929950fea67c51fe3e0e78f7a309687182ebb0ddba8ada2811a60a326e4e5e3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2468961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938f3e1fe1d9e112e6dd8d27200a6959e4d46df63e6679ad24264539e3c887d4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2468964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa387cc1f0d4efe7703e8a35176072382942c48afbf80b82e32001fa9a11aeba9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2468967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36956af15b333c42a963d86e6f3da24a236f05ac79d069a3de5e399dba6087a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2468970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be9f759ee9d8ef62735fb65bf2648f4e2de55191416041cbaca3ddbef485d6d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPC2468971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef93c898c6146b1a0e2a69f5cc97f8eff8d267c3f590cb7b885747d7a593383. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT66K2505508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b8a20eab343eb0041ec1ae15101c5611ccad58294b5f9678c7c7db7a68172f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPB602188405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026c95addc0e494c0b92c369c926fc3344c2005143507b1a4bec11d20ef1c036. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPL2061438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac04b50c8166be478fe630ef6b153e08a868e90914a5c9f85c0b67de9b883774. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX972314009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac04b50c8166be478fe630ef6b153e08a868e90914a5c9f85c0b67de9b883774. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX972314009.
ひとめもり (maco marets & TOSHIKI HAYASHI(%C) Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8cb0af781c4c84cdf63bdfcab9c76c4e672896efd93545d925b57b19972823. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY492400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2526cfc2ad0df6db9d4eae9196599cad716fbcbf9fbab4b954fbe2512af2e10e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPN2029742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfdb1e1d0c9528aa8269a1cb53a1d5953942df1c8cbad06f957d500ce159cb4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPL2061509.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe16bb8b642af185bf01ad8341221ab4eceb1331167fe29a20fa6afc9b5bf7ec. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZQAY2212886.