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 0xfd6fa70454eb56188a3e6d7ff9f925f24bea1fa7dfa3750c8b28b9a94d99bce7. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd8e204b-9b69-4223-8713-f0f0e31e7d56.json and https://artists.proofprofile.net/proofs/artist/bd8e204b-9b69-4223-8713-f0f0e31e7d56.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 0xb49139c034418e68682e4dc782e5ab828d9313871ffebff3ade1e8d3211d4574. 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/TCJPT2270077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91522c952f20b2780741ba244f17720e393d6c668934ae0f2d30845cff06f761. 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/TCJPA2485055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd1f7329dfe8ab54168911bcda28582d3630d365337dfcd0505f82a9e5b2a04. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/TCJPD2583233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f716dce025533561a1cd093a564e244640abc97f8047af0956ac57c035d2bee. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCJPH2501395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ca1d366deebe7ce598af04e01151803f860498c3107b1a29b46b2285badddf. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCJPH2501397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ccaadcc154b8d858925ec31172521dea00dad895123b3993c7dbda90346b4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPH2501408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6701ceb2126766d4967300252d08663b0a4369644fc0a8ff4b7d8dc04d9bcaa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPH2501446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c540cb767b820dae197d812256745590ab22ba3f90d804dca0ebd39c4e4a58. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCJPH2501487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b19a24a850913c67faee56fdb767564ab4f266483b49ed99cc32459c13a159. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCJPH2501507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce9050a9ed568dcfdaed3905e82212ae06d7425cf236c3d002259c4f51b9717. 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/TCJPH2501514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c1eaa539d043c05903409eb86284bb15a0ccca8c7f92dc649f1c4f624ca88. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPH2501523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f716dce025533561a1cd093a564e244640abc97f8047af0956ac57c035d2bee. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPH2501395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ca1d366deebe7ce598af04e01151803f860498c3107b1a29b46b2285badddf. 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/TCJPH2501397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ccaadcc154b8d858925ec31172521dea00dad895123b3993c7dbda90346b4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCJPH2501408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6701ceb2126766d4967300252d08663b0a4369644fc0a8ff4b7d8dc04d9bcaa. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCJPH2501446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c540cb767b820dae197d812256745590ab22ba3f90d804dca0ebd39c4e4a58. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPH2501487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896b148a28e62ceabaa08dfb366d5a5a70ca40c2f3b6f8d107a9e5fae2ff71b5. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCJPH2501498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b19a24a850913c67faee56fdb767564ab4f266483b49ed99cc32459c13a159. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCJPH2501507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f835faff3576b98b8f8521cfb730d5da5ea3f7fb3dcadf6fce82fa91b8984c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPH2501510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce9050a9ed568dcfdaed3905e82212ae06d7425cf236c3d002259c4f51b9717. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPH2501514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012041ad4f361d9fa28b78a1d94507af99e813e0b8171c450516c819ad99a12b. 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/TCJPH2501520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c1eaa539d043c05903409eb86284bb15a0ccca8c7f92dc649f1c4f624ca88. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCJPH2501523.