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 0x48b4567abe53c4cbe2d4e9cce34c873a6e144581310ec2396760ecda69796430. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06c5be7b-5456-49c1-8a92-74445529174d.json and https://artists.proofprofile.net/proofs/artist/06c5be7b-5456-49c1-8a92-74445529174d.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 0x8a14e72a696ca1a5c23aaaaeff034eb8e3114d228cf07229aa25451dfa76d219. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB8KE2410679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b6f27e418ada2838ea9e11c1de1e46717e91bec552981568cc318ad2fe8354. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLFP2378993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf459a0d957cbcf6c1b2a21098587298a5837915a561b51984618ba16639f8f17. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBLFP2378989.
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 0xc0916f929187b7931043354da5e38679709e296e740534951fa3427cae0c4c1f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SE6I32340683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4634b04ac5643683ec22f5bf2913d1e5359bf321a60dd594c3c0ad99f7d1daa5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLFP2378990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ef6b7073ee3f3a3af276a82bad82da20199c5038c81f238d62e828f441f74a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLFP2378991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127e10c94d0b00f18e7e3fc4ea2820314ebb1d4e903253f0aeae44bf7254fc41. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLFP2378992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf53037a40695710c0438ce676b8103834ffa316a13239ab0459afea1e0d100. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBLFP2378994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cfd389c517f6fa2fad3867f6c6fd04f9106f9ef3decdfd36e8a76de23dcb70. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBLFP2378995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83302f2f2686c50626e850d244cfac95222efadb0d1d762a255580221ec859b8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX53U2046545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2bcad5ded329c9c8b8eab1dbaf6cba0e5f3e89873bc6547ce540b9f7836f64. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX53U2046546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a40fd9b1236595ead1f49ed6f33c64c6795d16337ee95f6c634ae4aec36c9f0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GX53U2046547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ace8aa14396ceae965588a4b62a386912d3d4c1107f61777dd5a0f5939f7539. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GX53U2046548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353cf9ad2d68058b553596fbacc28cd0b9684d2370535a1fecf2e340d9254ab7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GX53U2046549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd48b224e8cf185fa62ac2fe1519138b896fc1410a0409d5ee519f6f27a79f7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GX53U2046552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2054a3ef0ab2a402da07831c140b875e0edc5139f62c4c8800c93deca54fc7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GX53U2046553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0e9b6f0aade0a4ee19b1a56d7725f81a550cb7e45765b9f45bbc78551e5728. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAEO1961315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2eb5d33526b843522b640a588c5dcc4a0fbf6155820e9d2b1b9fc39fd25dd. 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/TCAEO1961368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca0693f8dd3949367b4ec65f171832b6d3ef32dd2cfb3220ea7a6b9ac779616. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCAEO1961242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99181800ec1df138b8025ef7d5c49fbeb3cb047035c063e230c1fa389d00af7c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCAEO1961298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934d604e4e825366cda8e91cab80f57d25589ea91dd1373dcdf9bf49f9670342. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAEO1961311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98d2676a0a37bb4dd8350a6121bd8874b49fd97dab471bcb6e0f651a219140c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAEO1961318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaa704d669adda0ede8c6f639dbaadae2f222b6e6ca051126c2b411e1d55bb7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAEO1961350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b022c550ad282f9a516a04581dcebbaed945274ef4a13352ca2a8fe6aee2f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX3Q92496657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476ce3e4a5e8ca81e71768d7758c1c029b0a9075808459b068e4bccebe3269c3. 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/GX3Q92417650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca90a873614b0b4448fe17bc3704e50a9f0cd7f6befb0a222ecb01201c105b01. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GX3Q92337599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ecdd553b6732c22e253c11cdc5f2b4cc166f21d3976d337fc48e7624a8ca9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKXN22248526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf8e748d848ca4c9a07fa51213e6c6295f7873422275ae61bc2124fa01cdc52. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKXN22170630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f86de36407e6854832e575fb4c0e0c2cc1ab93b563c08a08d8a7842c378a889. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAET2031542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e3f3187638823bb637d59a8486a4c30707563de49b6c4222b099d875eff718. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEQ2058780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf83a9d8f53649517c8cad0afb2f96a86b921d4d76fd18e53bcddd24967fd390. 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/TCAEQ2062892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef3c72762d454767539793bf3b7ccace75aeb0311f10c434d59117c6cc6ae0e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEP2034084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e92c63e0012857fa7167945a2ecb838f26a82e89937b353b97718900f42a99. 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/TCAEM1966438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb1a8ddccc0cd54ac8281995b2b90da4c49fa8c852df98ccfd5ef5c55713700. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAEL1925487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa21f3748cf976cafd4d73679eb22b4c0151d0b5a64160b6d53e37522f8db236. 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/TCADY1848912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0f3b6e7e4d6873b85c4d57a1b6b9e6db887988b92fd0bde9d4f84578e1150. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB8KE1852497.