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 0x361e8b356428defd5e79b6f2bc403eadcbc843456ac8f33be141b29682ad9b78. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c6956aa-0588-4fa0-98bd-22c866daca86.json and https://artists.proofprofile.net/proofs/artist/8c6956aa-0588-4fa0-98bd-22c866daca86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Richard Cœur de Lion, troubadours et trouvères
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 0xea7ac8cca7f7d6dad635a51f0dd84c864873f23c5454dc26c54e1b4faeb7333f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR10S1758042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7304fdfa9f9f11c3f946bd16b4b4c0e4453fa735fe8fd76627c475a73bca15. 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/FR10S1758044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212037bfa89aa697f9113a520440cb5849ba1f47878d6a0f88bde7d708043199. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR10S1758045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdf128d2d515926ca02e38550cf5f78e73d75f3f1ca8b4d2344400cbaacb23f. 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/FR10S1758046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c48e4b628a768992f903a6f5480b916679d50c6ffbc293ee5956af1a484337. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR10S1758047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad5d6775bb53ee4bd45154a1534f4c35f602d053c9becc6d07c4fc3a39f6282. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR10S1758049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf455dd74e4fcb1bd4042569bf37ff2b4b377770291e14b1e438f2f64af4cd5e6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR10S1758055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5a13df05d337588a56587d012ffb806d98cfaf2c2a502201dd6d66d353a6f4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR10S1758051.
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 0x5481c69d466312547f5cbda0252095ceb00602ae930d3827e9d9b80acebd7dc9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR10S1758043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823504bae35d4450287f6e02e217c229205cf92e25661d8b9ec647c27c757a8b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR10S1758048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f6655e0c3f7fb503b7b4c8ee7cb19b589887dc2dcc0884bba31ed22d6f52d0. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR10S1758050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b2df2c0fe20d9ace882bac18e7826e9182547e765be8c0317bda6be9cf20ab. 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/FR10S1758052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdfb385f42c8bc865f88b514bc8fa0605ccbd7fd31c941d9b6c6bbd59d15109. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR10S1758053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638318cd74c96163963bbfa77f3c9dd01425bdcba2086da5881c613dbceba0fc. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR10S1758054.
De Champagne: Le chansonnier du roi (Amour courtois et chevalerie au XIIIe siècle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5e62373a816a82bb4dc0c01f5c58e660808f71c9c06636d63ce28bbfeb181. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR46Y1221110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf77b00e99a26549b02763f316d012d21873de8cb9febc1da9729e33affa345. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR46Y1221150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa72dfd962b4a9c1aa1b729955ad3018dd29f01149dbf91e76be7ba623bec1ee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR46Y1221190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bacd4bd29a9df68890b938e26df59603e44cdd016c97ed6ede2736dd8991a0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR46Y1221220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b09cc0e453846a2d397a67b4459eab318635aa3af6a8bacb5febaf3ca05df9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR46Y1221230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661fa5894bcef3ea6aa677aa48d167b543a70a850baa16e0c557a2d859145e1d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR46Y1221240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd567463735f106280cffd934c88d799d941d63453401f850919121f69705a50d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR46Y1221100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb674d6c890bbb70cdc45cad4935c60c0840585a498d387080fb78f35c4b01162. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR46Y1221140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9305ff75d817abe69b67011d151975be92e686e8d5849e9dcf9f791dcc7143. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR46Y1221160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2ec1764bda909116889e1cbd46a358854f35dd8d6ca2b0050233acb6b140f8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR46Y1221200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38be609c91a7095eba5594307ff729b758f4355bf138aec372ad220d26222d2d. 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/FR46Y1221250.
Thibaut de Champagne: Le chansonnier du roi
Juifs et Trouvères (Chansons juives du XIIIe siècle en ancien Français et Hébreu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa52061b8415d02e5527539b70ffd298163f354f45adcb92115ce871acded5c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRV732002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69689d936d9fc7c1365985a3a20dc98a1f9081bfa6f4c7dbcfc4069641c1fb24. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRV732202902.
Ahi, che quest'occhi miei ch'erano lieti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9afbe86c991ec3e06b4aaafef95e88b32ace01c560bb0d9f1db772cfeb6e749. 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/FRV732202901.