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 0xa369864f2d50647cb117620bb477f2565f47d6d43c817c6dfb53b2fce6440fd5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77b75acc-f017-47e1-bc65-5b3ef0357134.json and https://artists.proofprofile.net/proofs/artist/77b75acc-f017-47e1-bc65-5b3ef0357134.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 0x702b9b127fb4a1f4fe8cc451a7ca50a95883b8285c4e7b79406eb4a6b6a13a4a. 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/QZ5AB2055227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4215b677c5cd96b676b64214cf48f87694a1234793411cefe68ee7fa6f78d1e6. 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/QZ5AB2055229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dde0be3a467b660b6f18d9e568c1b1f3544f80aca0b90c1760868fb7448dbd. 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/QZ5AB1942888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c850410156be12c91420a5bf2b497cb1172fa639f314488b6e6eed4f7dd6cd1. 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/QZ5AB2012279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb7955e79a48df0b1806947d51071d90ddaa1d47189eedb259df945ef12852e. 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/QZ5AB1839161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f024e76d6f695352b20a492e2ca5377ae8f7b9f2ecf0789d338bbe98435274. 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/QZ5AB2055230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a64a78c7863947b85c98285692629f85351e6af22bb7e2b42fec2782e64984c. 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/QZ5AB2055231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e036c39f35e9aad8008c48321ff412b34c01384611c087fac8f2b6073d68911. 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/QZ5AB2055233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace8d9242cb6db504d8890942db77d50b97175ef3a45f2819a4d5d21e379acda. 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/QZ5AB2055234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a0894dd37ce575df6dfce7ee7e15240be61c22c31de6c5c5ada09ef1fa8bb6. 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/USCGH1670932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090e200b9cf3df4410419fc218f46aa0b8143570960b8ae3232d0f97e0dc504d. 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/USCGH1670933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb49e9e1ab1f3131739ff022e14752ce4161174a5995878731c3746f4dacf6a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH1670934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42b10506e50063ce8c190421ef920943fc9b03f30e74537e3c032f18076db13. 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/USCGH1670935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3334bcf0c64706c2c82e54cce755ad0824a7476ddd68ef5cb1b40b754d9a2b5b. 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/USCGH1670936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc866b4d6a6b33fdc6269b5eee5bd13b04c5da8d0eba29b810c426cfa698f4c6. 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/USCGH1670938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f15b0c3c54d5090819a3e42b085f1ddc4403e710f80373d416981375232d48. 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/USCGH1670939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b0fc2bfc49f98146d8c45cf812583c7390e3ada03f1349148550b0b4fbc79f. 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/USCGH1670940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e442c64605aef847a8ba01404f53a29505f1b03e57e7616a90e0ec80b713e. 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/USHM81510581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa524a8e13d1bb910f42d82d7e7ee7eeee17456bc70024190031a875bf0421569. 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/USHM81510582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4afa5f9f58e17365bbe224ad5bc13bc800d5e9f8c478b261eea4be38b05879. 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/USHM81510583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbf0af9f4427db85ab563bf71a1221c35b1201f5a8cf2d5a3bef627f24bda9d. 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/USHM81510576.
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 0x341c736a1b18768ef9dc9d230079add46e0f6bb45484b7579db042fa3d7dfae4. 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/USHM81510580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cb71276d8eaed3b5ee878445b4200cd4d5e0d9a2e88f67f451584c282f02e9. 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/USHM81510585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e2bc16f23523412e2786f8dbb78f4929b1e2d7049c4242db299eccaf6776e6. 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/USHM81510588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f764305020999318954e75dde35df15986c391407f31fd90c0d9da94c6d7122. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHM81510589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d61191ea2ae31225b58f836b2444f23ddfcd7d89ee11a3dbe4ae2a6f3a2f04. 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/USHM21990661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835c48ea183bbed360a39122a653ae8e874dd2209af9853451c6e6dce09e0ed3. 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/USHM21884028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b1297c0aa69415d0bd6fbba8113e37f6eab9e5d30bf03a95b5f67ab63c4c7f. 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/GTA101700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe995bcd96ac6f5b3bda1595e37cecf2cf927a3f37b133b39ddfdfece955d62c. 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/USCGH1832211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb55e393dd98c301031807b8055dde690b169688f7eb752901f6628bd2002c06. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USCGJ2234274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb63736d8816fbf84e9979f4d2f2d0f93aabd3d62dd35aa608e29bccc75d95a. 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/USCGJ2234275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf270ccb287e6b04fb4efaa5dcbd5e41921405ffdda020b946606d4ee87f874b0. 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/USCGJ2234276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042c0cecfbef3e91182965fad7fc1218c4abecca2bc451f29676f3c0360d16c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USCGJ2234273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742877d01f6035e122e9e021d07c4e8ab1681f0b2e189a253ab2bd3cecc42bee. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USCGH2278686.