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 0x3b80ce20f7c0b64bea1b66da64f85f83b958401fb5fcbe69295efb1238ae0203. 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/66f2f6dc-f4ce-4887-9e71-fc395ecb40ee.json and https://artists.proofprofile.net/proofs/artist/66f2f6dc-f4ce-4887-9e71-fc395ecb40ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Último Beso (Enrique Heredia Negri Canta Agustín Lara)
Esperare (with Miguel Poveda, Farruquito & Niño Josele)
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 0xa1a6e0b62e425070f106544dd6bd2ffc5425969fc23aa1cf4f579e1b6c596eff. 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/ES5021200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a6e0b62e425070f106544dd6bd2ffc5425969fc23aa1cf4f579e1b6c596eff. 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/ES5021200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc08b6055912c2a64628419de026b892fad31a3925ea1c53c486d2086feed4b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES5021200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f3e2ce0585c5de5cfb9dc7b27070c06c06cc8271ddd2abaf38a9d621207ca4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ES71G1619372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad88faeff875cb3486541f8078eef9affed94f24e7905a0f649ed28e88b6231. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5702001766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cfa7e297d528435b2c13de03e3dcec3ab1941abddb5b663e49d65b8dc1961b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:50Z), 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/ES71G2301090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde02f319acfdc7686f0c9d81da1b6278ff486a3a4ac54699bc24b9f686baa766. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:22Z), 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/ES71G2311898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f83dc9c683b3d28af7d34130b1550e918fc6a680e118ea57a99ea16901d7739. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES71G2425676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55956716ba8c485e9125fb8e4dfcc102ef3b240e6a28f9143787207e3287f5c. 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/ES6101199101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854dc9787d4dcc3181aeaf75912e217605433eead3068d4fdacec1fc6976a3c4. 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/ES6101199113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b6a144849d2c7fa9a952b2f8f4438d067c4fde4b5f51d52bc113b1af3ea0aa. 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/ES5129900295.