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 0x0dc9dc8c91a319e8bd4516218930d8d8414c9fb1cd2e99c88bb6907e487c0dfd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e38af7a6-bf00-4c3a-8946-ce0c61dc7d53.json and https://artists.proofprofile.net/proofs/artist/e38af7a6-bf00-4c3a-8946-ce0c61dc7d53.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5266cd5baaed806884efe7cba5f80d12aaac4d9314f386cf86f364910c424fef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR79W2300820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069264b7767f90f0ffd66ccf251fc49a7a2b85a341f82b0d8d595f679c377825. 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/FR79W2100740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9776d6f9ff534961adb535325ab3bc00b87cd888e7dcdda70022cb523825fc90. 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/BEY911400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a8f62ff83c1690a17807b4ee5f86c31d34cdde9de95495224a81f515e678e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR79W2400360.
La vie d'écolier (with Ours, Ben Ricour, Ben Mazué & Didier Wampas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015c094e2f76d9c7dcd8a15f4f9834347252e2d0ccd63264ab6f78b137af88d2. 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/FRZ081300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014e48a58c0c3e6ba6ce39d21a05dd0ecae0d551e45327e97a8fa2a9003863b4. 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/FRT461500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30640c40472ef178699b684e5ae15bcf70e4b184b913c383aa280b84edd3a508. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRT461600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48028375f1bf9c482be09080164d031e8dc9b097061b1158ae29c311340cd32. 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/FR8Z01600094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834126c1fe99d127c66622e185a09069a06d7f2da3a300fe40a08ff6dbb5e756. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0Q2425461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be6a5dbfaf051a89d09eeb36d271eccd75dd1d0832ff8dc1063252c006c37d4. 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/FRPGB1703800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5266cd5baaed806884efe7cba5f80d12aaac4d9314f386cf86f364910c424fef. 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/FR79W2300820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f516496852cc8d2611d4668037e22df6010ac9b220b1d4235468f8885ad669. 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/FRZ052000392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a47daedee1516be50d5dc51ff6cfb6b3cfe54b8d836d4d5f0ec2691f7137005. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ052000391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65e5656024dc184ef95bd83bb880f3d1c9ddc4c688ace9cf7a0136f9529a667. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ052000393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9469df96b376bffcc53993ad3231e20d60dbd9dd6d7fc2d4cb7b9e1380935b4. 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/FRZ052000387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d03ec066ed0aadfbb6dc7c6cd5187b355bf4c9d71bbd896162da416691ec891. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052000389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc118d5af402b1df9535ac199e9a525da7d30dc807d595c87d54b3715a66322b7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052000394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671e6d25206eb335fdc604cdb3bcb73bc2df8e6dc65552218e2ddc296dbe7796. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052000388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e12d4263ffae37b2a4957fcd56e7e0488d5232ebba995b27f182d35170bfc71. 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/FRZ052000241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0e5ab526ff3d58ec38f35e5766feeff82940d5d12a68fd9828e0d2def539f3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052000390.