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 0xf8d027928467c4af5451846d1e92ff63c13ef854181e59a3faf0564fec3c3c7b. 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/28d187c3-9c47-4100-bdf8-096997f04786.json and https://artists.proofprofile.net/proofs/artist/28d187c3-9c47-4100-bdf8-096997f04786.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Garota de Saint-Tropez / Carta a Brigitte Bardot
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 0xa989566a7758fcf45ff1deecf584768972e762e2f2e94aea1858c90a4ac19695. 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/BRBMG2200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba39bdd4570806024b9252c3cd30a4e7805717543349cca280f8953324e5be4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:49Z), 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/BRBMG7100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86971d6f1501e0cef9baba3572212170e97ecbf4d714f9d1d653b5cf68cbe705. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRBMG6200095.
The Music of Brazil / Jorge Veiga / Recordings 1944-1949
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b26a4e9328accaa3ccde0fa4dad8483307513a7d3041986e840bac900fa87ee. 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/BXMPD1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6583bb831b35dde53296832e34b9c6843244eec262a8dc2f86e8aa6d72dfa07. 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/BXMPD1900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbc8fb1ca2f241f25f77c46a7b5b25a8a22898a7776f23e645d4c2a92e44103. 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/BXMPD1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0a761cbc6126affcc46bb96d824eef0ca779f3099562025966274578a394d7. 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/BXMPD1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4321c7771b5fe1ce1d3c39acd26889648f3d4c5ce529fccfa39a3161d5b1bba. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/CA5KR1820796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e75ad2fea637b67f3a6df2c3a9837a792813def4ea98cc6ba5462d353f4175. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CA5KR1820798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f891b30a9e1e1f7dcfba2d0b2bdcbf5eac8412c3d518126c24c2a0d22a506b8. 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/CA5KR1820800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a62bc914730dfc9a32d0785c7fdc55f436d23ad60ea73120a4b77e23cece95. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CA5KR1820808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89c0fa963986fa24f998155b32d8981f718110402c6954756c212ab29158b13. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/PL66V2207187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440e844829a9e924f6368826fe08cc7cf9cf63c0836bb042e6f2025aa7142039. 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/BREMI5300030.