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 0x9138608214fa76c65a40d03093ac7824c1a5328041e0a57a680df0470cdfbc45. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a927314d-310c-4c3a-8ff8-906c0f933c72.json and https://artists.proofprofile.net/proofs/artist/a927314d-310c-4c3a-8ff8-906c0f933c72.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73329b768cb631daedefb5fc5d95f79df48aa54a793343bfe5e49e2571bb3230. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES5119902509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafcd99026f69abe8435e0ac8080836c332e1deb8a1a7667884e3a12e735bef0. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ESAAI0194409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8736b42c47e1551e18e35cfb5f7b3e66595a12b52117a0ba92117f9701680e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:07:23Z), 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/ESAAI0194411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4cf83296b1ae160b2796d3a46ff3a250e0edbbfd94917c4ef1ae41557e2a0e. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ESAAI0194420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb720fd244a8aadcc4a3a156eabb0c5d295d5eb40a7cff45e8f3a1b5aec4613. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/ESAAI0194422.
La Alegría De Las Sevillanas VIII: Esto Es La Revolución , Cántame, Rintintín, Yo Me Pongo Mi Sombrero
Por Sevillanas De La Feria De Abril Al Rocío
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82b4c06f81f737a82541636dd0dae4cbf05f8efd0b8b398e63e2047a4b95469. 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/ES5701100827.
Al Final de la Palmera - Himno Oficial del Centenario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545bc6f263989cd629678935d25ddb50e43209e3d60042bc8529a7ebe93edccd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G1508777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69162daf27c676bb5426e1a7d20e25e0ddbdcd3b78d43e452506bed03280ce1. 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/USDY41946276.