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 0x1cb8950649deaf18562eef197775d22d5c11a65c34adb1a1d6f1e1744ddad586. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e709f4e-0498-411f-b4e3-4df9dd45331e.json and https://artists.proofprofile.net/proofs/artist/2e709f4e-0498-411f-b4e3-4df9dd45331e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Probando de la Escuela Peligrosa (Remastered 2015)
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 0xfff4d7947947b14c4ac2c4dccc3d807a13ec545adc3b5ec7c60c687ab6319c3b. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/US3Z40408172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1adb3e8928d461969adcd63fb0a5b26dd305fa7fc66f0c902633ed19e3801f7. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:11:04Z), 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/US3Z40500533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32f3f0085fca99893fed49dc8c014b3609c79ecdd810ea6c6931c7ce8e1715f. 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/QM6N22258641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf142c096af5c13af5a01eddc4db992bf79704ac0bbc42444e662965b4af7a. 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/USVH72500001.
CEND (feat. Zan'Ten, Papi Sánchez & Ta Skippa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a5df94d3712f81d7ce217ccd5238a62f6161262922fdebaa086b787e3c9af4. 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/ZAA012200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068d3b57367b914144f41903f8171c8fe007d8fefefa1e815af4d372d7f60310. 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/US3Z40408169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7313f3234bd0cea3d173aae15ee846a5cff6fc6da2889272cf10918d413f5708. 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/US3Z42200934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899f0989f73901ed191188b6e567fee47160a6fab027fa99b883c701a5c112fa. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/US3Z40408179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd9f41c4143b3067779e04eb95ddd33ae4aab310ea1edf23cc3f00e0ce6b619. 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/US3Z41501008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaef9c515370f11b3dd34f43b82d7a054371ceb469d69bda9da6ba0e48f2aee6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US3Z41800269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf8e9250fef6fe8c1b802278d0f4ccc97ddddfc9f2381d3f72685df4083db3b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3Z40700168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068d3b57367b914144f41903f8171c8fe007d8fefefa1e815af4d372d7f60310. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US3Z40408169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0a9492c3fc5710cd37dbd2ea92f7c7ab2490a8c0017f34bc16cbcfe4c38bf2. 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/US3Z40700114.
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