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 0xf15bd9a10e40e65f4d072845bffaeb1af5e919ff45e8af6075d09c8117bd0166. 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/07eb0ba9-814c-420e-928c-3796e541e41b.json and https://artists.proofprofile.net/proofs/artist/07eb0ba9-814c-420e-928c-3796e541e41b.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 0xe01c032cbc650f42de5ba847751d6ebe7b06b03fe5c949073d8d552fd0d0f7de. 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/NZSA11300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3544c4522ebf6649a691f109f2db49e3b17779d5a4bf71f3dc838519377ae3f4. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/NZSA11300474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d171299004ed8d78505a22395e1e8a8fa701a16506879e2b6c6ddac7cc4471. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH6542122791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6de2cca9cb997461405f5c5a8c84fbcaf54df30d067a56b90a540b2faf9f2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/CH6541681611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dd5e050722e4ba8430b66c3586a03156f5687e7c4b6fadfcdfea3d546951a4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/CH6541681610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442a250b6a5b1b0590ea1bd2653d2315b7a000013e5d054aba0fc2269035b733. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/NZSA11300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df45f268f216608715e6a2b9d6038a25a0df576181fa1a62e5bf46c3df0f055. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/NZAM02300643.
Les Plus Beaux Succès De Barthélémy (Mori Star)
Duo Barthelemy & Matahi, Vol. 1 (Dansez / 16 printemps)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a4be19c5c1327ef988dfad6b50b3a0c514946407adb9fb20a39a27667ae14b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NZSA11200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15230e51732005cd36b9407f6881a24a1415aea95b6e82391125b6de41300c6c. 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/NZSA11200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77cd3d3861090c9aa730197e231b88c9933e9fc22bb335f2cdca0e53c53eef8. 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/NZSA11200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd84d78e435c71ed05848c86ebbecf19b1d248db2bedbe4518c823fba8a65d5. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/NZSA11200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaba0aba7ede4bc9cab10c55a44d16828c4e32a0b18f3a5db7378edb6c0b7bbd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/NZSA11300452.
Duo Barthelemy & Matahi, Vol. 1 (Dansez / 16 Printemps)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1dd38e9e846ce47d568c38e2adae42cf351f4806b8a956606953a63bb0876c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NZAM01401769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be803132f3e89221f87e04dbb6037ee4ef4b88ddce9f80d6386bf5b5cb92d2a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NZAM01401770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5150c81c348bebb83df5ec59037854cf75dec977afa48e5a429f66e7c41fc381. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NZAM01401774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa59fd21dfb38049d797aead19164e351badcb1cf41faf301cc119ef476288f. 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/NZAM01401775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c31cf96f7aaab21264b7357b18274ee4e60e7e8b61e225cdf1b2a4f68ce7895. 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/NZAM01401778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1244062956e2bd02615c471c51bf12bdb1a01827484140a4b059d5d223775d1. 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/NZAM01401779.