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 0x52dcebc357964980d0fb435d2042d0cf6ce8ccea8f138b6eb6bd53d5add50e03. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01bf333f-5570-4bbd-9751-dae1b4110eff.json and https://artists.proofprofile.net/proofs/artist/01bf333f-5570-4bbd-9751-dae1b4110eff.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 0xd6b96230c40d3af3afe1f366b249d26b045570e9bad45ca8b8d780d390232b5e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GRE011100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe91046df56e0c97207559709367d3f72c26ea70a1272ffc4d0e8702c9d5315. 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/QM6P41918981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5196ab00da58086fc2d33ace395e4a5bb27c4679326d0c2fa68ea1bc629110c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM6MZ1809668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3067a9e9e15850c39ecf4856cbe1af986a702a7848e4b562dfbb7f99078b2f. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GRWAL2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a041b6b140d80bb748bbeea4f7511d28bcd4f7bd7130cbccee58f563f0a19d. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QMDA62424238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101207ec7c016880f3fcb2d6b73214f5e867d773e35c5f5b292aad06cc9e8773. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMDA72401131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777aec31e990c99ed3842ee741511129d8cdb00f863197aa5b044e7a495ec345. 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/QMFME2475502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbfc92df006ce37c207504cbd3e42c633856f8981ea1f1cd60de453606b7dd6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM4TW2557682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3220b245328498816a254efd83ef71c4dc1ce7a01a5455736f9d5133bb82fc2c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TW2587349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a86c26a8888b6f2d4f8922f4237147a70d99ca3dce205db4fcadc2ab95a275. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QM6MZ2514895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e899119889bf72f09097f2be7818b5569f9e81b4210824381bb22b453a4c8ab. 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/QM6MZ2521312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc370b9cb5a8fc6ff56904d4df97930c1fbd31e8a5dab6b47a595319df43b922. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QM6MZ2521423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3067a9e9e15850c39ecf4856cbe1af986a702a7848e4b562dfbb7f99078b2f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GRWAL2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbfc92df006ce37c207504cbd3e42c633856f8981ea1f1cd60de453606b7dd6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QM4TW2557682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe396aa91d8b589daced63736f9907a90b6bb9a6db0b58efd7b084283edae3882. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GRUM72201136.