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 0xf1f8c230480f63b586d51a0e9f7cb45e7973773e111a31dce1994983b12dfb00. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ceaef6a4-dd0d-4fab-ae60-004300fd4240.json and https://artists.proofprofile.net/proofs/artist/ceaef6a4-dd0d-4fab-ae60-004300fd4240.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 0x0629d848dbaf03a159d159322de98cde281141a6a293e9bab1291a273fb8da46. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:49:56Z), 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/FR80T1700550.
Best of Les Horizons, Vol. 2 : Jodler aus de Elsass
Best of Les Horizons, Vol. 8 : Ambiance alsacienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4af04337bda9d7ee542a5e2166380e54e8b2f5b3a05cbd17012c4193954d61. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR0W61834691.
Vivre une belle journée dans nos montagnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e51c724b8d32b471e73e690bfb170b54e60fc6bb0ae63255bb9d48677513887. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:58:51Z), 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/FR0W61834700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd690c08dd66c35406c4cf9cfa932a858f9e8d7623b9000f37e4dcabf6a456bd0. 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/FR0W61834701.
Best of Les Horizons, Vol. 3 : Instrumental
Best of Les Horizons, Vol. 5 : Jetz gehts Los
Best of Les Horizons, Vol. 4 : Ich liebe Dich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe76eabb353ea0b5a6ff37971d71c85fc2176e2721d48fc10aa23b4de8d09cf0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR0W61834683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318512f6cb8bc21610869b2893d5eb1dede3ff33e69211cf30c519532e011b28. 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/FR0W61834756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe537b700513576ed7987a85ab34799e2ba4d19b24ab05b3bb3183fe447ce2386. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR0W61834758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f25301d7e792487789bf1ebe751550471fda21dccdb68e4da83670e5e966908. 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/FR0W61834760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519a7a0f91d0e2bd3a61f9a3032876706cb029600705f156bacd3268de42b118. 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/FR0W61834762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8196526510485728155757dcb9e867ea911779419e3de41d55eb2997aebe8b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR0W61834764.
Best of Les Horizons, Vol. 1 : Sentimental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5791ab4f811a97409bb4bb2123d909ed607e69bb34b96a22321dbe7aedc43b9b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR0W61834527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eba0b7d77893f29116df2ce1436816b84ba2ccceba88027512abe789221d0d2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR0W61834529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb9d27f85e55d3087818f2289829269a0119af70ae4747053a0e0e36139f14e. 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/FR0W61834530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa15650bd84bd4b5bd9441d7ad080cd40f539bc86f875c4b458d9b717f63ff3d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:15Z), 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/FR0W61834775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0192dec30ad32c28955524fcd02c284cc223d9d4bb4142ed19a5ad3765a0d90e. 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/FR0W61834787.