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 0x81599af7e129b11e8508209ca5384822b8e4f92803a192388eae9bce9dff25a9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e125439-214f-4467-8538-6fb9313d9ad7.json and https://artists.proofprofile.net/proofs/artist/6e125439-214f-4467-8538-6fb9313d9ad7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Monsieur de Sainte-Colombe: Recueil de pièces pour basse de viole seule (From the Manuscrit de Tournus, ca. 1690 - World Premiere Recordings)
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 0x777aa9d80396528955c7b4c3b02b9a9641909b33bd40633b56edd20287e6b610. 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/ITLF52311848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6162fd1fc066a80e633f57beb1513fc27be6883dccf52e4d5aff83d8097303. 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/ITLF52311854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a3ab811f0193c670732da103ddce8390497cad060c298d04c60ad23024cf3f. 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/ITLF52311856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafa52bcd9c37460459c2fdbb0d5e8e55a0380f3231cd9fc0740e2d049254a6f. 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/ITLF52311860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cc98632bd2e950bc643f66eec0536d1a280b1a3a3e349f8349bc0a017c6df7. 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/ITLF52311864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd403935154acd0743faf8dc6fb0107ebef92f36e963e2cb0de628b313b6cee. 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/ITLF52311870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83256e5ad5f11758a7291001568ff426d15f90e43d20742a43798081ffedbc3f. 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/ITLF52311872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c057cadf40d0e621ee77b72c21a8c3da9d7e9a0889d2f9883291a690f6c27b8. 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/ITLF52311873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8ac38a5db9cc898cda268667e4d5335d26170bd71e716f36890ec17d54d979. 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/ITLF52311874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb17c31fefccad376fd9ba27b6c9536376ed6555daa4bc2bc2e73728b0bcea6b. 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/ITLF52311875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faefb3ae5e58804e3a7983bd784f0ffcf18a0faf28d4c01617e2c74b72ae3c9. 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/ITLF52311879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8fd30e31e4b88e679e67dc559fc0213b4f4205beb4b2605b02883bad36d442. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ITLF52311847.
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 0x914648c790b73e3383a08eb33bbb568cb35564df0052c3c181630817c2d33361. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ITLF52311849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa7a1e8db0560452e12b97580140ca4deee98abfe30b76ed3a1718bd6adb260. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ITLF52311850.
Manuscrit de Tournus: Double de la Sarabande 75
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaed69ff4556911c13ee5875f4751dee50ccc0f566dd42bd562859aa1b2dc5e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITLF52311851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ead7cf0d9ae5dc6adb95706a77b75f46babd93ba81624c6bdaf3d259b1a5c8. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITLF52311852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70db62d9aeaa58d3a69f8f4f55415cacbeec5e195bd730ca00af5a68c52b2df. 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/ITLF52311853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffa5ad3026e4d839de9a14eab2a1ba04447f7ff116a352a6753063c4273e681. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ITLF52311855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298d4663d8b8f15c0d9c0919a05802c1f5bd6fd254e237ca463f2feeebb552e4. 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/ITLF52311857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79099472481a662dc8271b8f5efd49db0b3b596765f04eab1a90930444799885. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITLF52311858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949f51f4de7aafb08ffdec10dd15d835e66f737b6d1424c8d43206715813e6ac. 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/ITLF52311859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2384d18d92c4af9c733598aa1bd1ce1c357730cf9d47eeaaaa999ae1cf65d6. 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/ITLF52311861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005617b84bff2bde020d5e96dd899b08281a156289a0ea5e9b0efe21a609ad02. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ITLF52311862.
Manuscrit de Tournus: Gigue 73 (En bourasque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70adfff5a56e62a513583e655974c2628e3af7859e20d0411c4ff0caa8b9360f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITLF52311863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f596e8f84ba510e015a7a618015adf12bee1664b2b0e7193df08ace927098d6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITLF52311865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb706355b6207de85fd44b425f31190b494b03c31372bc198732c05462ec1e4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITLF52311866.
Manuscrit de Tournus: Double de la courante 30
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7cccf97dad7397cb855e7bae6d5e37f7702abeed31862e57c430e12ee6d5e3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITLF52311867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d7140fe08394a251513aa2f93c22aa88f55b71425749167a3ac3c9645f9c22. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITLF52311868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6276abc214a0e489f2069b94ae4d118fc30e6637a28c3957d9b078d9cf3613f3. 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/ITLF52311871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fcb6a4f408cd975700b848fa8543f27b026879a55caafe9205ebace31559bd. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ITLF52311876.
Manuscrit de Tournus: Double de la Sarabande 71
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944d120e7948e918047fb5e65100fa27cce15745ba6cf7f4f97f7c4b03457f7d. 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/ITLF52311877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01685fa0ccdf010e97341072c330a4a83649b4d5face814cc696ab8138717a1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITLF52311878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b82224cedb1afcfe1d1443baa9ce6323fec4fd218b085b33ebbc8dddbb73c84. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/ITLF52311880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa533d2af9652c127f8cd09176babfca9a0cd4f371b48a31eada0a7264779e149. 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/ITLF52311881.