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 0x152f2f868dcb7f12482f49e5d3a0e6f0f638348c779234333567e049a3878c95. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb2dc32d-b323-46c6-b79e-08c6f9974a3a.json and https://artists.proofprofile.net/proofs/artist/eb2dc32d-b323-46c6-b79e-08c6f9974a3a.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 0xc0e7ad8773d8be4094cd447dd84cf2883355f30b4416cc853756286a82654366. 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/USCGJ1170990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d5d8376868ad01f5b4c0749e8f813403d5b6d9c91acf3613ec23ef1ffad469. 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/USCGJ1170991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60bec1fba9c402fdc945a350ea4cccdb7777036a571f49c303e86034d949981. 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/USCGJ1170992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c1ef911d9db1d106deb8d3d3e42c489edd4a4145b2d6a4517f3a4265ab7ab6. 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/USCGJ1170993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a7c9a86e6a7b66984fa2bbfe8d385d8f76fa42acb8f7f9efac96fdf9782c4. 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/USCGJ1170994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef595c35292c22be478dfc4551e91e1c739690f17f3866d1f24d6982ebe44aa. 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/USCGJ1170995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a77d0c91fbe12473ea9ac3cf612896021aa7ad5db0915d7058e634201a3c43. 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/USCGJ1170996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cc77584de5e3c70323e739eaba0f98f8efb97df0e146a74081b3e627b655b0. 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/USCGJ1170997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a38bd0676afc13e36d689a9f1b262666c0e5f87ab951415a2b238416613ad. 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/USCGJ1170998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be3629f2f6fff11590cad794e0e88597d88e4f8eaa1a2f01ac82a88ee5ba6d0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:54Z), 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/USCGJ1170999.
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 0x3b1100538df1bc742b10926c6252795a86ec84703a68bafbd6459a9f99c9f90d. 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/USDY41870539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf25bbb435985bd7625182475cfcec4223385486651885bb4b9d27ec09f3edd7. 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/USDY41870540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6891411a769d89fc0acaa91fb8d4bfa432ad0c62259b06a1034e5650ee5aaa1. 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/USDY41870541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6476d29ac2de22e6a87426983f0685c82ab2b220de4fcf561a68047ea64450e1. 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/USDY41870542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd20eae7a91dd5e75b6aac47704a8a96978f04022fb05cb8a36c04e2fc818c. 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/USDY41870543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0a70df89cd6da22fecd40c4abd509d920d0cbc2869712e34e7a327505bc46b. 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/USDY41870544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2999f4131e9ee9f6cfff5c617c471f5d07d6ec58f7d7e1fec46441493402060. 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/USDY41870545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8385dbd34607431459f14d2dca57ccf94f338f6005119585262affb2349eaa00. 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/USDY41870546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52cc46d45e2ab3dba80fcf28e1f8df3606f1592e25cec0decff610c3f6ddca. 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/USDY41870547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b23e4c81a45024ddaa49dca259d398d6dcf50a3db7b5ed41e38c9e3fb25bc67. 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/USDY41870548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa63faa82a4e2bd9718f782e603565670af45bfe2a259ef56e2c64558186408. 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/QZAPG1877120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa850d6470a3967643cfaf3fdbe481798857268e4e397c5dd5d282eddb0b2b96f. 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/QMPKX1790174.