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 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 0xeb243cef965bbf8c6154e617944651f75182d609f21e17622da3e8b938084ed0. 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/368c8da5-ff8e-45ae-a058-fea76aa21bff.json and https://artists.proofprofile.net/proofs/artist/368c8da5-ff8e-45ae-a058-fea76aa21bff.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 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 0x696151ec16b3301dede57b69bfa12a41d2b019b5442f189bafdd2005a56114d2. 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/BRDJM0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b0bc09eda0ca369ea30b39816f00adcce2cf7a21c39177e83008d01fd95ef2. 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/BRDJM0800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea499eec9dbcf3ce08c0c36a5a04d3ac35516e8653367b91f540d29dc9b2c80c. 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/BRDJM1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156fcdbf315e64b121de403a3a22c2b5aa13009e49242bb8069dea50d492909f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/BRDJM1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc18e3f03c97f747d772dfe7e59eee1ed6281e2ca64ebfd6fee36d6418ce7aaf. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/BRDJM1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed08556f7690d5c4d3121b30720c05b8790ab4928e715d487d9c1937d95aed5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/BRDJM1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ac0670b01dfbe8f6c1a09f9285bb752462c769b80d7e043f8af975b30f66e7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BRDJM1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbb61ed7be4b3ed366deea45ad0d40876ac67527274a048442df97869c440c1. 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/BRDJM1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe442330437ef8c9e414949169372e91f90004fd7da0e7f1149884719f583772. 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/BRDJM1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb89478bbb8a3f4b3ca097206e361478a5916dde522c4fa02e27415080e862e3. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/BRDJM1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2dbeabfcaa06aa68a168cfcce4e6d6138cca71ee6ac8e175573b3a307c5225. 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/BRDJM2100004.
Lança Sobre Mim Teu Olhar / Único Desejo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5d74ce628e0e0efbd50bfa5829a2ee7803bae50b7170c9020bc09c18b9d156. 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/QZNJZ2354885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abb31c6dc3d6acc4713ade85c2c1782eefd59318369ad11a2fb5e81d0f4164c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BRDJM2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742396508dfe73b30614a032dc6c118552d1b2b0c4ff32cbc2c52bcc8d0a07f5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRDJM2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742396508dfe73b30614a032dc6c118552d1b2b0c4ff32cbc2c52bcc8d0a07f5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRDJM2400006.