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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219616c095e5337909e7610dc322e472e6cc8848d6e0460ae106d23e2763db90. Chain 2 (Bitcoin): anchored in block 954015 (2026-06-16T22:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34760a49-bd0b-40be-b04b-19be7868046a.json and https://artists.proofprofile.net/proofs/artist/34760a49-bd0b-40be-b04b-19be7868046a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lamentation: Quis dabit capiti meo aquan?
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae744274be1ee97ff6bfb1a90d5c304329060e6de88fac61adf516c22621d7b. 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/QM4TX1777237.
Si habrá en este baldrés (C. M. Palacio No. 179)
Erasmus - Elogi de la Follia (Versió en Català)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e51881f87201c3f3f3a58a9f53faf3a7a4356f6c2e81fef8bb514ac1398ee. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US6R21347940.
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
Erasme - Eloge de la folie (Version française)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c3c1ac8286682b159bc7d845ea69175c5f1e0ac1b288ff8bbc223be079e35. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/US6R21347758.
IV. El Fin Del Al-Andalus, 1492 (2 de Enero) La Conquista de Granada: Villancico "Levanta pascual que Grenada es tomada"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dc12392ce09481597904a668b2d1f748a3f2cc7ad00b9216410e018ff51e1e. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/CH4210600103.
IV. El Fin Del Al-Andalus, 1492 (2 de Enero) La Conquista de Granada: Romance "Qu’es de ti, desconsolado"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf60c96901d3ff253e8eafd0004f1fd13f598959935d498a91b1e64be5b0142b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH4210600104.