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 0xebedd9e496e6fdece5f6b7fc76a4c22cd5c4c5c4c099fbc7206d88f2aec2ceca. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2926079d-3c7e-4a4d-b137-2555bf7f2994.json and https://artists.proofprofile.net/proofs/artist/2926079d-3c7e-4a4d-b137-2555bf7f2994.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Navidad en Familia: Novena, Villancicos y Pistas Musciales
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 0x7021795d0fb11221830856ca95a77ea2c48a8baab5767632ac7f8d4c8817ea64. 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/QM4TW1774579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8d0a7917bfc64e1984a9aa12dd8e5e8ad47760d4c35a9f18b04f33ba01a1fc. 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/QM4TW1774585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361a64cc2eaf605a0c1856807a423da5f866db3e2c612a23c726fb049b21df1e. 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/COFC10910205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094bdd39b37c3cb724dce1725756cbd55aa41261a31062dca419ce9ebc2f0b9f. 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/COFC10910208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7181d17cd4dc3862a8fd3e14f0491437e57f92ee401794ee3e470aa6035a71cd. 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/COFC10910209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22212b28858ff5fad7352c4e8f8c6aa702643d057c96fa1fd1ed26aedbc317ae. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/COFC10910211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c4246ac88d752573f379fb43bd76a0257342891abfc4aa3244567035ebc246. 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/COFC10910212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde76baa49bc5c34195add6eeb319c80d4c130ee09934742034cc45cf67dce66b. 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/COFC10910215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e30abf39ef48a42befb0293af204e871e52ee24fe7b4e885804a7a7cf615dec. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/COFC10910218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6318d8275f2b143b03642cf2f44f059c8616fdd8879ea1014b71492f1b7eb3bb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/COFC10910220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc41490369cd3e6daa23b6a20b00fb7ada99f1b7c6cb2dcae79cde49020e225. 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/COFC10910294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb507e1b5ef1ef42e1e367c2a9a60dec119065159d7a99f161aaf9511e346147d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/COFC10910301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003100432f30c0c17b1c31dad0018102f5f2805d829fa46da4b49238dfcac966. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/COFC10910305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ded99231bda9c93b95be4cb817b91614acaa4f73d40bdfaaf04818d2d0c75f. 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/COFC10910306.
Colombia Instrumental De Exportacion, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90fd312920c33f4343a832a599364b00d1e441c152283751f4a5214cea5f31e. 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/COFC10910312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5f7fea84fc8b8cfe73d5ec329e66584cd48ef0b57758832532298644c48bc1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/COFC10910318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467a8f2848cf44199bf4337259ddd59764f67a34f54125236ea8f86d49774f4b. 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/COFC10910384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21498030874794bf8b896768b011fd3ffec1229d259246527addc24f7071910. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/COFC10910372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb71324f40f710df3c58ae15ff80af3125b89c730a742004c3bf85a5f3adb165. 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/COFC10910378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3193e3eeb1cafb955fd7d96a9ec00ceb15b4964bfb7bcd5f86330ee7e6dd103b. 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/COFC10910393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216aa5bb6ca539542e2208d0815c9961f9423434ddf03048997bb83c0d02d313. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/COFC10910382.