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 0x4cc26e78a506a3330f453822d7f35d103857927f845568f77d7cd84b14e02ab6. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2a10046-f03c-4318-90ff-e25103612b78.json and https://artists.proofprofile.net/proofs/artist/e2a10046-f03c-4318-90ff-e25103612b78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les Quatre Saisons, Op. 5, Cantate No. 1 "Le Printemps": No. 1, Les fougueux aquilons
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 0x317717c290713aaacbbf9a93b181063db948313c5bb767118c910d809758b62b. 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/FXR522414401.
Les Quatre Saisons, Op. 5, Cantate No. 1 "Le Printemps": No. 3, J’entends des concerts d’allégresse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b72e3910e8d0692bd2b9c843a57a932a9ac02e42d3abc0f23f590cd3aa2e84. 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/FXR522414403.
Les Quatre Saisons, Op. 5, Cantate No. 1 "Le Printemps": No. 7, Les grâces, les jeux innocents
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0846bce84ec9f8b01b0c8e306af37675a3207fa8d33d5f4281112c417cf2d0. 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/FXR522414407.
Les Quatre Saisons, Op. 5, Cantate No. 2 "L'Été": No. 3, Mais quelle est mon erreur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eeb56a6d26398a3fd2d9241760592d86e6e38385549b8cbe060480c1a63ba3. 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/FXR522414410.
Les Quatre Saisons, Op. 5, Cantate No. 2 "L'Été": No. 4, Moissonnez ces fertiles plaines
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6c9516e6a660ad45afd446e042cfcde9261045ea58e9fb76b0893c4c842d1. 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/FXR522414411.
Les Quatre Saisons, Op. 5, Cantate No. 2 "L'Été": No. 7, Ô nuit cache aux yeux indiscrets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b656a05e9d8d162eb462eb294d70a23ce17a12ef3e4a225226b6e88c34da8a. 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/FXR522414414.
Les Quatre Saisons, Op. 5, Cantate No. 3 "L'Automne": No. 1, Où suis-je ?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e550f526720dd72793bf325675506ded82600cf3ca6100c4185a477bfad5ec. 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/FXR522414415.
Les Quatre Saisons, Op. 5, Cantate No. 3 "L'Automne": No. 2, Chantons, dansons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166e8f098e9172f0efae20350ac969f0e502c5485e8c05909ec83f4646884f00. 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/FXR522414416.
Les Quatre Saisons, Op. 5, Cantate No. 3 "L'Automne": No. 4, Coule dans nos veines
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee2a76bd09169a5861db539abe83f96c5ebc17ea4a3c566774fff18272a2840. 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/FXR522414418.
Les Quatre Saisons, Op. 5, Cantate No. 1 "Le Printemps": No. 2, Venez sous ces feuillages
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7485885da3f439efd96913704ed84132520b781ea077ce9e98478ee3c8ae42. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FXR522414402.
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
Les Quatre Saisons, Op. 5, Cantate No. 1 "Le Printemps": No. 5, Règne, Amour
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6cb73b44410868a291411842cce9d0bd8190ff40b50ccb23990fd2a03fb3c. 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/FXR522414405.
Les Quatre Saisons, Op. 5, Cantate No. 1 "Le Printemps": No. 6, Le retour de la jeune Flore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c52e607301fd8f327c92aa8e523f6b637112db3c1ede1083f08999ca183e12. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FXR522414406.
Les Quatre Saisons, Op. 5, Cantate No. 2 "L'Été": No. 1, L’ardente canicule
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a44f1eb584c229ccf635a833529e4ff78c030c98fbe79e99acbcb34824b28d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FXR522414408.
Les Quatre Saisons, Op. 5, Cantate No. 2 "L'Été": No. 2, Ô toi qui répands l’abondance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6fd9e7d22b9707b1c06157b0a939d0b2e319b819407eb04dd5fbd0089db077. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FXR522414409.
Les Quatre Saisons, Op. 5, Cantate No. 2 "L'Été": No. 5, Cependant, le Soleil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673b9feb5eaccd6011fa39f6dace0efeb32d46768320d043d18a6c9c530bffe1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FXR522414412.