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 0x752e7eef99e81c9bbf87a3014f4277d450b127542a3060a77f0aad3a4e5dcd25. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7c2c26f-5c5e-4f23-b0e7-9d3431439bf6.json and https://artists.proofprofile.net/proofs/artist/d7c2c26f-5c5e-4f23-b0e7-9d3431439bf6.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 0x69af4c9a5ea0f07f0646c9cac7f1d781f2798b344b632bcce46984e42959fc58. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DETL61411557.
Dans sa maison, un grand cerf - Boîte à musique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d4f2a1dbb94bf1fb2f67ab39eb82a4e8c56afe6d25d39870e854e0cd4f60e6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DETL61411555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7666b85b2f311057335116793fae8e0310759e7a2c0c39f5bbc9cf902f923da7. 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/DETL61411552.
Promenons-nous dans les bois - Boîte à musique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda4c4dc9a4e7dd5ec24c2085b8da1b730cea6a3109be43eab0fddf0f98e63f6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DETL61411561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa145b9dc981fd494677fa95cb6f8e25a969885690449dad0d188ad37a3a1e8df. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DETL61411554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa38b30783203fd2c3cda6f51727c9edaa583e8ef30c1214bdbe8e22dd7d6f3. 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/DETL61411559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe938b46d1cd9044796d6267f90e07220e5781f4ac5878bc2bfbacb2e856ccd5e. 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/DETL61411556.
Ainsi font, font, font - Boîte à musique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9811f4a94b51824563389cb4ac595822885152ba0a8ddff69c7893b6d364879e. 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/DETL61411553.
Le Fermier dans son pré - Boîte à musique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0f4b31a4e15b574f744f4eca4d1782eb4ee28860796158fd62ee23f9f0c3e7. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DETL61411558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19caadd7774128c2f12859902f42e261316e4e2a8aba149fe0cab7177a46e70f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DETL61411560.
Savez-vous planter les choux - Boîte à musique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfb75c8c68a6c527dfbdaaf43714c36571960ca04d2b8da464c11004009124f. 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/DETL61411562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa0e82bbba456b474fe82ee0ce7f71418fc8e6e63e0db8e0eea4b9a3060ad30. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DETL61404488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a21334ef0755085ef7bff4af14c70a288ec17ac4f7ae7a7d63dc7169299c31. 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/DETL61404485.
Les super-pouvoirs pourris - version ukulélé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d8aed3efba68da682bd7b91b9f70461b8db39ebfeb43bbbc8473d75be91373. 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/DETL61404490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59acdf82aebfa69466d26f0bbc04405aff1cfc3762f8bcb5f4594d3ab661eb04. 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/DETL61404495.
Si tu aimes le soleil frappe des mains - version ukulélé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600a18f7759506efe74051dc6a2ebc563128b73275cae16b2edf9acb211c5877. 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/DETL61404501.