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 0xa35713b4d913d058ed7afffc1dfeaa9d58b85a8845d8f30659c92928007edf20. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4abe5956-9d14-4c66-9fdb-dc4c824e5da4.json and https://artists.proofprofile.net/proofs/artist/4abe5956-9d14-4c66-9fdb-dc4c824e5da4.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 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 0xe9be04a7eaea6811868431471a8422c56274d81e607f20b7bceb85c08bedb67a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES7730008467.
Pneuma, el Poder Espiritual de la Música Antigua (Pneuma, Spiritual Power of Early Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4381fd42e3648d48c196af65066ce6c5f5e318743066b8ea314499a31fb68f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES7730108280.
Escanciame, Bawakir Al Maya. "El Agua De La Alhambra". PN-320
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc52fcd5983f2321025c51f3c7e4293c0b025e9c8e2abef9ca08fddbffd235a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ES7730108313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5c9951016637163b1faa677157772bd7f62423366159a96f893296e8024467. 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/ES7739808271.
San'a 'Indama Sadá - Min Suhayba Barat - Gazálum Samá. "Nuba Al-Istihlal". PN-250
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703058a3d7536a07393776e4759db20d8e73ba49326ca50f3cc96216dfb84be4. 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/ES7730008469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8dfb4473fcad612612689bb87beed1e62b4b504c0153b659647ec68bc6fb31. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES7730808177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2794f8ea36292137882b8ca9e1c0b293a0a0ae57d7dc9fd5800d1a759c85c93. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ES7730808179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd432fcbac4557cc47188f9d0175c6a569dfde047bf6fce92d196d252ae7c612b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES7730808180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f34f45745fbe3353c2e70a6f9162585de43372f1d13a0d7112e55cc4eb46c1. 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/ES7739808273.