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 0x1a0ab363ff10c2964e2fd79d536ef22610a343c80f50d5a2be1fc6c64e521d53. 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/a0dc61a0-3286-4652-8032-4c180bf40a65.json and https://artists.proofprofile.net/proofs/artist/a0dc61a0-3286-4652-8032-4c180bf40a65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Homenaje a los Amigos: Canciones de Juan Carlos Martínez
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 0x4e7649145dca49fffa4c856514ad9761b4f163b28ab4d964578896748cc87733. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:43Z), 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/QMDA71543823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172a083014b62ac313521053c7dc7af5d34174129df90061d8ebdc849477d6ce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA71543833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e182f97240ae09ddc9b7582b6fc1d8ac0cb198935b28e112d014fa99b83567. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA71542457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580c10434683e1e9b37a92aba34228b34082772c4384e5d2988bb27a8b0cfb63. 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/QMDA71542462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba67a540ddb2a3d0bc3760fabc469d51ece4fa1b7955954c3b4073abd63b0ea. 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/QMDA71542469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79008dff0f213519740fa1329fda049b9899e9f7bf2e0cea324bebab99b5bb90. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/SE62M2377703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc708217d44a98f1dd6dc17ceb9af542a04c6a0fc649a32319119d6d92601298. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:29Z), 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/SE6A92356634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79008dff0f213519740fa1329fda049b9899e9f7bf2e0cea324bebab99b5bb90. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE62M2377703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd742429609846ef6185b48a4b124803d66d58cea41b1852dd59fcbf5a8352c0c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SE6XX2335293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28b7865e9275f86e67e0663247be504048646d965b581845a4748979ad7b88b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTVM2384688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d6cde3abb80908d17cce497f36685ff5e00d30bdfb502ce89054d3ff541e8c. 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/QZTVM2384689.
Selección de Polcas (Kuarahy Reike / Nde Resaraimapa Chehegui / Josefina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ca09847d3fc1503701b1a5ff9cb38283d256cfd554ea2b46d00c4998c4b59. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTVM2384690.