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 0x06113f1689bbd04d563761e9eed9e8cf5e5d1553a547f7fadd9750d1250daced. 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/56fa2a67-1ee0-4568-89e3-8d68caedb320.json and https://artists.proofprofile.net/proofs/artist/56fa2a67-1ee0-4568-89e3-8d68caedb320.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 0x0628d6193609308a8a8951779100a510d12f90bc398d576ed7b8930ca863a042. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GB8UU1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc114f7efcc0b32ce6df95bd4a020993fb7e3c9db3e394029ce13d5ec357fadab. 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/GB8UU1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96da54fec5089d1bea9c5eeee8b58aa10160fb05def3069136ace9432e3b9ef0. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GB8UU1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dff4ef897491e50fac8a721e7d2a184b8255fbe2af7f6f3b2107ad1bd5b485. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GB8UU1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998db564851560c0809841a9f48b306b72205c3233f9229f526bf119f9acbded. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GB8UU1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f19f4f1437005360d04530d086726d47f980b86dedd1f931700c5667d3e217. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:24Z), 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/GB8UU1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3038deb3041f1148fe2ac2f9a24f154c29fc89c793fdb0c4ac5d30368e12b89d. 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/GB8UU2000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3038deb3041f1148fe2ac2f9a24f154c29fc89c793fdb0c4ac5d30368e12b89d. 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/GB8UU2000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524414b68d3fc2f75cef5d56cbdb2655f3ffc580d8889101a6f68888a3f99f89. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:04:02Z), 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/GB8UU2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46da4f27d8429d49df81389dcba46c4da0fab03d7377d8ca0ecf9054051d3fae. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GB8UU2000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772321c5f2b2c856ce56015a096249bb6dad524a6e6ed148919a14024d1dc405. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GB8UU2000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663f627eef26228610256ce6e8f48a773952348a8494b90d0c3ef5ffa0fee6c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GB8UU2000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eaebe8751d09f5e37ced70a36f85ff69e2451c38195a3d064024472bde2dba. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:41:20Z), 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/GB8UU2000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a759a3b7e1b5e7e585dc516251373a68439b601d46cb64ed6610fa256d6a2ed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GB8UU2000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5808eadb2943491f179e34333078abba539fc147e3506e29728a6a7d304bab. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNWY2271436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5386b340ad7e5430c62c5ceed0b65d3397d315fc719240434e8f51c7acb20745. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GB8UU2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b1ee29a8e2c1fb887cebf515adb64d21043e23c23de164744cf10a9b882232. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:31:07Z), 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/GB8UU2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0230da1e7f81eb6d1f35aa58e55c4261ae8d8f55ef66581380d8286df27d71da. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB8UU2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d496e1f6798f9dfc51a76ac6efac66357140835affa7c422db84371b2d3259. 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/GB8UU2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbf85a5c33e43060593b6129d1efae764b1bc70203895183108d73c58857a82. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GB8UU2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7444156b1d706939d6e90fcf2915b9e2a93262a3fbf63221214a768318ab46e4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GB8UU2400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224cd838ff011dd9d3e8a298ce5a1d2a876c5723acd65c2b5d0bf5f8daa89f20. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:44:54Z), 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/GB8UU2400232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731e25a858ca4282d42bf4a1231ec26ee4a1f362a55fd6efaca299086a14f369. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:26:55Z), 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/GB8UU2400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d98a6c4dd6a40c04dc5ab81c554c92212c9a9f1504cc7c8652b0b1d30519e62. 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/GB8UU2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3839c215a563f4b98fbd390caf0297f40b953845e64e0d2f823cfb3ca1ee96. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GB8UU2400239.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09db9dc490b9237722762e840eb7ee4038f1ecb4e4422a4394148cb8f020675. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8UU2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dd0b051a1c6edfa8ea1eb56789f47e26de0c6fe5573e6dc9dcf577735fab23. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GB8UU2000125.
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 0x61265bb485f0143ba50f5ebff1ca6f1edb677662ad116f4bb7b6d4c702504599. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GB8UU1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbb22c5ae7114edfd16f38b8bd417cd2e1823ee94e5fa30ecf43195148bf281. 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/GB8UU1700012.