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 0xeee2df73f433243fabed76bb37618e57988be4c3bdd407f0ba0e8ef51a98b307. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/287b46bb-20fd-49a9-abfc-2a1b9f274680.json and https://artists.proofprofile.net/proofs/artist/287b46bb-20fd-49a9-abfc-2a1b9f274680.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 0xdc989de556a6c5ef1b537a3f61f5464fc19b75cd6a3e4f86e140f9f6cf4c7e94. 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/CAJ720425801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2bc9e393a509437553049ed8924e32f435bf8d65dcb2a5964ff34db8d57bee. 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/CAJ720425802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbac985a571c9114060628ba4d5ee575f17ebc9c166268f2d7a642638a3526e. 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/CAJ720425803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7ec4edf365a9b061b74ba90a0af8c826a42ebca3ffedad35bea28aa85c2e72. 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/CAJ720425804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d513ddec03771218f7bbab42240aedd553add57e9a10b647b8276812290a3c. 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/CAJ720425805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba6f8e3e82a1a6ae0ba5d57b2115a40618087f4253527f82157136344b3b74. 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/CAJ720425810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb487637bf9fb6391483e22f4cf72ec8dbbb323e3a417f4e9d5f889ad5b5c661b. 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/CAJ720425811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d768524f5678f259a2d85b37ca761a0ec4b06cb6834f073803d659a0fa7656. 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/CAJ720425813.
En montant la rivière (Arr. by Susie Napper)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0b944b7dc50892e6a3a6c192c3c3ebc0864166055cdfa10eac000f82e91785. 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/CAJ720425814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96083355ce685f10fb29fe2f85c7290feace5a660ad08296f11475c6ba333734. 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/CAJ720425815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be032dc10fee559db327034645ee6eac471ea7d346d3135d3053ee63fd74c16. 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/CAJ720425817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8624b86466b0a5e9972faf94f48529524312d9e3bdbf232d582e5560ca65f167. 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/CAJ720425818.
Mes quatre saisons – Printemps (After Jean-Pierre Ferland): I. « Madame Cailloux » (Arr. by Daniel Constantineau)
Orchestre Symphonique de la Vallée-du-Haut-Saint-Laurent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb67266a8bc68508ee7687204af706c7baec0354c1572b97fe641139884852d6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAJ721571501.
Mes quatre saisons – Automne (After Claude Léveillée): I. « Frédéric » (Arr. by Daniel Constantineau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29188aa928679cb7553b4a9bd05758d1fd1047c17699773bcbec1884f2fa1129. 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/CAJ721571507.
Mes quatre saisons – Automne (After Claude Léveillée): III. « Les vieux pianos » (Arr. by Daniel Constantineau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a815f441dd3b5478699f6c02ab7c1ca754e34acd93f7524ff21439ceffeba7. 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/CAJ721571509.
Mes quatre saisons – Hiver (After Gilles Vigneault): II. « Pendant que » (Arr. by Daniel Constantineau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff77f281dab2b4f25ad12659a6f0dc3e42944744b51b36a7cf8b3862828e6a2d. 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/CAJ721571511.
Mes quatre saisons – Hiver (After Gilles Vigneault): III. « Danse à SaintDillon » (Arr. by Daniel Constantineau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da420ffd8d3beccd90166ca4a5035d0627c0f2f821d4eb1cc0a8ab45d52a3e0. 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/CAJ721571512.
Les Turluteries, Suite no 1 (After La Bolduc): III. Gavotte (Arr. by Daniel Constantineau and Alexis Basque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05db67c9765511f9836b62fdcc7a20d1a2217b6870bf940813632fb3cd36c8a3. 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/CAJ721571515.
Les Turluteries, Suite no 1 (After La Bolduc): IV. Bourrée (Arr. by Daniel Constantineau and Alexis Basque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4077d5c21de1c9a64787c23148ecaa20c38444ff201001457baba5a1416802da. 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/CAJ721571516.
Les Turluteries, Suite no 1 (After La Bolduc): V. Gigue (Arr. by Daniel Constantineau and Alexis Basque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a92fe6a27f6159f33af8c3043340208844f2712e5676fe7c0cac900c560a11d. 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/CAJ721571517.
Les Turluteries, Suite no 2 (After La Bolduc): I. Ouverture (Arr. by Daniel Constantineau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f336df248f9d137fdb8c4b8fbc4d3a274eb07266682297fc47b8ec1235ca2ca. 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/CAJ721571518.
Les Turluteries, Suite no 1 (After La Bolduc): I. Ouverture (Arr. by Daniel Constantineau and Alexis Basque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a113fcb1db65efe20cd5eb4a30a0cab60cac53a2b90d88cc93e498f2a88164f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CAJ721571513.
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 Turluteries, Suite no 1 (After La Bolduc): II. Air (Arr. by Daniel Constantineau and Alexis Basque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206aea5115b60a8ce80fa07c1d861aa641d27c268eeca5b0978d2e88ac4f7202. 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/CAJ721571514.
Œuvres pour deux pianos - Matton, Prévost, Hamelin, Hétu, Landry