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 0x8e79777d90800f4aae940cf089fad2ef13f24804fa22d1cdc91445175ec2ff49. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/917c4ec9-cf65-4d75-85a6-c225ac83e5c0.json and https://artists.proofprofile.net/proofs/artist/917c4ec9-cf65-4d75-85a6-c225ac83e5c0.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 0x187f9f06cdb473fa9fbb540657c8b99b82dc7db0a9371dc4f97d25182a592884. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM4DW1713603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e51e0ddd2bff156b4fe080066bbfdc8c2174d01f0829af47a195f9bf9a8fac. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM4DW1713604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa41e58971acfbcd5f66f6215fc8126e7615ba62b855937e0cf54a8d06a563b2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM4DW1713605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea6777114efd56d7852f0d8923d7b41e65b66442bc5fcca269cd13b0d4cd655. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:07:54Z), 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/QM4DW1713606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2767f8d5a0820d5be64dfd3a19ddeec7cc6785d712604d5077e29232d03781. 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/QM4DW1713607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8c728e19f5cc5356165913d774fdbb2de4bf1aab10ca438add1d7dc0a8400f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4DW1713608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d5ef55f51585e3bf5dc18ec14932bea0dbefb3f0a3de9b986af390e14a091b. 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/QM4DW1713609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f090e11b49b2cda7a6693cac9f3e124f9e43ad42b503104520d215abb4c61d4. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:46:34Z), 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/QM4DW1713610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0fa78dcd79f57fe565e41dc1894853974ac175431e4527595a4c6caded6392. 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/QM4DW1713611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef67229765a919e2369357c37e1011c7f39ce99e421a0ed1f99bf764ac2b62e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM4DW1713612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ecba71a8da7e87031a12569e6e051ebf77bf2c638e84ae56528e347ffbf639. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM4DW1713613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8068381807d112e61cb0bed7a504b4c14fb80574a6376307d9b0e02d81f0b592. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:02:01Z), 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/QZAPG1823401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd067d3a27c610a93c48266b5904e5fda59283de010b67b2aefce01d719b4af77. 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/QZAPG1823402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b36c4c117230c973eaefb23d7d93d9a1f41bccefaf6b799ddc6495c4c3e53d. 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/QZAPG1823403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163e7f86a1ab391c7b98c700ed9a946ab608f202ef9a707e8c07d4bc75f1929b. 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/QZAPG1823404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f6d640982d5f2d84b780b5aaad55416e9591163cf01e727f76c3a748420afc. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZAPG1823405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554ef783f7b07b81b394f045170bffbd98af8d7fb1416f1be10f91e28acdc315. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:39Z), 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/QZAPG1823406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed55afa62bb64832d6d208d90eb9b939fce3109e715f8a95eed9f9f8d89d1dca. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZAPG1823407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b76199700a9ede4f319338d6faddf01a1ea3689506b44c5da36acbc0852f15. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZAPG1823408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1006df9634730230de5527ae4668bad6a6a5c35b279d4861e5a2542e3ef61e12. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZAPG1823409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd190967d4082cca50e14b42e8013b1ff0b752f8727fc2fd0b74e79aa9c37677e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:32Z), 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/QZAPG1823410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24deb272570d9b6831663b56a75f088041b04585707126ee492c88062f20c605. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZDA82023363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73291fc91b611b84769aba9fff06c77b01a9a437e445be9bb4a41fb8d00249fb. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6P2063980.