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 0xc3f6a3bab5ee7f0e7dddb40e148fcc1b4b9a6c8bc681fdea267d63794665a870. 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/14b59a58-ed3e-424e-8794-8229fbedec62.json and https://artists.proofprofile.net/proofs/artist/14b59a58-ed3e-424e-8794-8229fbedec62.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 0x931787ef97404525c8e7eaf59506ec247df61784725beba0d05a849a3f946474. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR3PA1700040.
M'Benga Bila (Extrait de la bande originale inspirée du film Black Snake)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9242691a55f56b466600ebc12dbf8323b2eb1b3f03ce95a6083ff3d7370b5fd0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR3PA1900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cb279762ef3879a866e35d522e27d6a333b3abb0b308232534edab1225136b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR3PA1900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006d0ebb9e13fb5a3fe690d32c6e72470c5a7d2b7438db2e4a5d43f95e388937. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR3PA1900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299c46c910ef141af465ea1a5df7b30c173e3e7cfa7527d489129d187cf66489. 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/FR3PA1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3098337926195ce984738c74df2df76087001ac53317d397696677c0c26fb9ab. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR3PA1900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda446b86eaf83a1b305245444d6951608444b72440c54e759a5f65512415ec50. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/TCAFX2102162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd506ccc30fd27697c113a06b23e3763ac9659a2c6b37e1485a47582b9b7d2bd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12359868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e78c9687964b5eabe97862b0c6881fa0fa7782ab42e66ae774d26b92448dcf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W12232938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e78c9687964b5eabe97862b0c6881fa0fa7782ab42e66ae774d26b92448dcf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9W12232938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afc95f76832cfcb9315482d76fc07abca96b04432753e4aed0d6c54f1e0edf2. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FR9W12359866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666f2207ccd132f87fcc675c9817eb127d07a5f78fa07fc33acdef40c3db3756. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR9W12359865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd506ccc30fd27697c113a06b23e3763ac9659a2c6b37e1485a47582b9b7d2bd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12359868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbcf7b1bd18689433d2bb2962b7c802cc76ee05c65c467395f2fafc2566f75f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR9W12534292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5405dd6b40c020172cf0efa888a028fafaf5cec79e1cfb9d563302ee9bbce6f4. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA052502709.