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 0x17efb85b9ff5d3bfca5ceebf93757f9a7627d36d829244414d835aff1e027b74. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf2f1985-82a5-459d-a4d1-b58af8f3f042.json and https://artists.proofprofile.net/proofs/artist/bf2f1985-82a5-459d-a4d1-b58af8f3f042.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 0x3b7f054f60efc07c7f94196b0d16bc5ae92e7230a00a1285cc7aa4debc7b0e8f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRBSW2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cce2f8f4425ecda1869cc0d4f8ef103deca3cfb4c2bb0a18828114717feb86. 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/BRH5U1600036.
Música Infantil Para Crianças Malcriadas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94149c6db5eb32b54b6493506a99b3020a7bb24222c53f4c67090d5619329e90. 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/BRBSW2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71689b6551e301981692596d1ec5affb5b84936283ee6e95d1489ad569894a73. 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/BRBSW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48032109f24875b69365a4513ec6ea39e48657eeb44a00903630e96f43d68e37. 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/BRBSW2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4708d9e0cc5e116620495df1219ed6364e005029ff03ad51e4b8bcd9dfd01f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BRBSW2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab1a065cb30490b02ac89bbc8cba0779a86b29b7c4e108627e7ffb71100fe84. 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/BRBSW2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ca8f8a71f648766be9669107cc0c2bf639336a6e4c6b3016247c7d4c5b58d0. 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/BRBSW2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec79bb3ba33dfb7b30834dd751d81155b4887c16cbcb85a1a7f2a491b48ea5fa. 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/BRBSW2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d20ab881cf96c7ad3c6cfd0dbcf4cd5e0fabf070dabc1396d3e862e0c051df5. 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/BRBSW2400011.
Filarmônica de Pasárgada No Estúdio Showlivre (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6ae6318aecbe0dc83b473914de370d148007286df02f1c9f8dcf5193dcbe1. 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/BRH5U1200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705b2b143feacc6d4202f6d3111e2f80fcf6cbdc334e6e1569c0d09165bc17bf. 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/BKJZ92500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5486d77dc60ad3cb092aa64f2de804c22f74877d3728f3e26a32f4f6b9c06cc4. 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/BKJZ92500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca32033d991ef3006609c1f7279c2285f228f6e6221457c289362033bde2b079. 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/BKJZ92500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e28e505d347a72c5e22f4e3fe51f92d664cb85aceb58650e2fb17e16e6e9c85. 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/BRTX61400009.