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 0xadf4963dee8c96770cd3b2b1dd44aeb52454aaa4411b0a00a1c6c2b60836d028. 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/ef1e3729-5462-4251-ae74-9938e0b2f8ee.json and https://artists.proofprofile.net/proofs/artist/ef1e3729-5462-4251-ae74-9938e0b2f8ee.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 0x1b71fa285760f585c2a624590bf5ca1cb5c82872243133608020de60f0cafad4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ91900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9793ebcaefeb7004bec784d92803035e6c086a477d8d90b500fe8a5a2cde0ff1. 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/QM4TX1832014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545e486947e515d58fd5991b5ca1fb0ef47f47bbfaae6faa646072a652de4c90. 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/QM4TX1832018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873a9796eb29925c445deb6a38c04e77fdc3c514e8b2ede80302c0b52e0bd7a0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMFMG1522734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc253e95a306fc7ae3e6f6ef110a6515c94a496a4a02453fdd0164a0481f923. 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/QMFMG1522738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9528a0ab56871450f5178b2cea9e283d2928c607e190967628303a7c5d900422. 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/QMFMG1522739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ffe6c5008efc0a9060135bbbc8fd537bae5e43bc58b2a4ce62cb2c993bf68e. 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/QZHZ52017674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e5c3dcc8514781c147ff8aea23d4efad91c4c6366604d21e821c95d303329. 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/QZHZ52017676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd763a0b1c5674d035753e1e839c05df7b26732a0b102cdd14155fc5e1cdf8b57. 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/QZHZ52017678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0bb91fad6fe372d780408543679a22373bf906b1756f867797333d9301f181. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM6N21926935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02845ae9d0c9d261a69baf2d8608228c1c140fe6877b9785eedfcb057036ac67. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZHZ52017457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f135fff9720fcd345c4d698bc83a76897508e5e3221ba784bce7e94b999b97. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHZ52017458.
Esther Marisol en Vivo Cantando a América, Vol. 1 (En Vivo)
Esther Marisol en Vivo Cantando a América, Vol. 2 (En Vivo)
Cantando para América y el Mundo Con Esther Marisol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e94a632e2b055e9ae14cdf3f7e8dfc6477f0b5f955c7e541db4dae715dadc2. 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/QZNJY2163686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77131678b5626f4d7d1d6fe2255d304f9ef6b3ddcb5beba694d57c255c49f357. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJX2305143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ce0fc6f30eda682f53074a3fb1b425d1768e74217943f3591b2f0db8aee33e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZGLS2529402.