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 0xdd995d379ccfbb110d2ea2e93c57f2ccfa3c57ff8f56515552a7206689237d0f. 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/cdc488c3-066c-4980-9cf1-8b17c096b9c2.json and https://artists.proofprofile.net/proofs/artist/cdc488c3-066c-4980-9cf1-8b17c096b9c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saxophone Sonata in C-Sharp Major: I. Tres modéré, expressif
Koechlin: Etudes for Alto Saxophone and Piano
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 0x6a7ccd9e5887cca430c7f7123e0f594db31fdc56329b610d1df4bfd490adf69f. 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/SEAEL0230010.
Saxophone Sonata in C-Sharp Major: III. Fileuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd37e896a69f59843c54d397db8bf51f252e55912516349349ff5d9c9f532c5f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SEAEL0230030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fd8f611daac2086484b42c34dbd11e07a65603841ab67b9af6485d0e1d738e. 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/SEAEL0230060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9faf397bf061a2028c88d924238e8fc689ec9888940bbb5c9b650c931e68c7. 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/SEAEL0230120.
Tableaux de Provence: II. Cansoun per ma mio (Chanson pour ma mie) [Version for saxophone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e52fc75b849e2045cf224a164dd2525a7a73417f3962ca5b1292fa457a95757. 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/SEAEL0230140.
Tableaux de Provence: V. Lou Cabridan (Le cabridan) [Version for saxophone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af3ef72637e53c969ba876032d5cd9894038456e1f602fc13549bbe17e0f89b. 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/SEAEL0230170.
Saxophone Sonata in C-Sharp Major: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf9291921105633327295dc2a7b714df7c8f920c362f24f56448381ee7b788. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SEAEL0230020.
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
Saxophone Sonata in C-Sharp Major: IV. Nocturne et Final
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb035633a0e9ebc333c6011cd8c2d21de2b534e26741317349039e6675aec6ea6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SEAEL0230040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f5ea91ad8d1c15bc1911a4312dbfe0d9dcd1566786f887610e229197b1ce16. 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/SEAEL0230050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39404c735f3e6a23de0f08d707474d64b8ce0c845992ce31bbb344f2308a0962. 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/SEAEL0230070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb113139bb302bde4b3f7fac5b4844c7e4b3a7ebd3dacaba2de06fbdb82a606a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEAEL0230110.
Tableaux de Provence: I. Farandoulo de Chatouno (Farandole des jeunes filles) [Version for saxophone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b52654c05af516744dad88f30a02cff3c0e90a84f850b7e1169e2484ebb064c. 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/SEAEL0230130.
Tableaux de Provence: III. La Boumiano (La Bohemienne) [Version for saxophone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda71881b1f1ebaaea22c4fb48bbfefef4638f36129931d704207eb263eda2bad. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEAEL0230150.
Tableaux de Provence: IV. Dis Alyscamps l´amo souspire (Des Alyscamps d´âme soupire) [Version for saxophone and piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4ff02da1577cb0a82da278fafd20fafc9ca0fa77a53f347dc3a17ff2da6cd2. 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/SEAEL0230160.