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 0xeaf09cad03e8cb3cd2f389f61c129ec1fd40a7333ce08624f9c21b10119705c5. 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/197a19c4-911b-43e6-b485-1c038bb1a0a5.json and https://artists.proofprofile.net/proofs/artist/197a19c4-911b-43e6-b485-1c038bb1a0a5.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 0xfbd0b50b9ba8b0374f6de76fa757d376229195a85329a07e04141bcdb2343ebb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES14E2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9694575570801fedc174b2efbcb83397fc5f24cff913e06df55f0cb6e871fa26. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/ES14E2300029.
Cantiga de Montse / Hauries hagut de venir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584007e5eddfdb5a68dee728717ff40470f31232442bbf239078a5a88e9564c0. 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/ES14E2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e88b51c6cf81215acb31b604a47cc0c68925fbade79a577808b35b22e9fd54a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES14E2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd0b50b9ba8b0374f6de76fa757d376229195a85329a07e04141bcdb2343ebb. 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/ES14E2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9694575570801fedc174b2efbcb83397fc5f24cff913e06df55f0cb6e871fa26. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ES14E2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb1189046e8f08689d0c65034907c5b25baad71a136f854a2deb50f251d2105. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES14E2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584007e5eddfdb5a68dee728717ff40470f31232442bbf239078a5a88e9564c0. 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/ES14E2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e88b51c6cf81215acb31b604a47cc0c68925fbade79a577808b35b22e9fd54a. 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/ES14E2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd0b50b9ba8b0374f6de76fa757d376229195a85329a07e04141bcdb2343ebb. 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/ES14E2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9694575570801fedc174b2efbcb83397fc5f24cff913e06df55f0cb6e871fa26. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/ES14E2300029.
Tots a casa xiulen (Directe a l'Apolo 3/05/24)
Tots a casa xiulen - Directe a l'Apolo 3/05/24
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4afa4650e3736846c8efab481139d68c5c982fb38774da9baa9105fc821ac2. 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/ES14E2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa049207326c7b281e1a04cf2955ddc658a148175142634736ea58cfa88da0fc6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYB282546014.