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 0x3c3103fd5c236505dce792f564f26f9b5040a7c9a2f773e749e00b325b31fb38. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95eb43c5-a24e-42a0-a92d-f2af75d4481b.json and https://artists.proofprofile.net/proofs/artist/95eb43c5-a24e-42a0-a92d-f2af75d4481b.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 0x8b8a3d8f0d6ce98ed026f238f1603d78a7c60c81f18ed16cf8691644e6b2176e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:37Z), 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/FR9W11420147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782e0937f9fca23868181e24fa4a0ddc3f589109b0c66c37df5c9bea446ecdbb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR9W11420148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd373894f5afb307bc3c2345b3165b090722fc9f21b6308ec52687ff6c2d787. 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/FR9W11420154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89718e25a44dded80b02db486092a340cfb590dc9e32627523a6918b7f8eafd3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:47:31Z), 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/FR9W11802376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eed0f59d4d0266a99333d4610964cd6374022f33d7cee956591f27b7cae2e0. 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/FR9W11802372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb396fa1645ffd24ad84097a29631db2b28f5d7a1ec2b30db13ee4ee5b56c1c1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR9W11802371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c6daf30721dbd7e6d2b71590a2aa80ca447169a9f79f03c80291668e4f4943. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR9W11802370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11099c296094b24b9b5f1bf52e8aab7e840636b56d4be14f2e609a88ce0fa025. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W11802369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebceda3c4e474ce1bf552ac9a5ec2de9b7896cbb84ff5990a8d6cd1994a517a. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FR9W11802368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bc640ff3e07e426cd2ac4e147f455fed3d243d06314af5f01ac1e65a2e70f1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR9W12117128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77011f69ac0adbee5a78a66f69204ba356eb2930e17c595daa2070d05c14ed77. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12110466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe147c2a844ec3fed0b54138f11632808cacffe8c9fdbf44675f72ec1ac415c0f. 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/FR9W12110467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfec1ac762993c92bec1ee2b7165a08ba38bdb89e646f60a1790f77d06e6e39. 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/FR9W12110473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d80b59b64b518d1d8df46d9b1d9004df2e9faca3ba341cec6960d386166084. 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/FR9W12110474.
Cachemire - Dernier essai (Édition deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476c4e9fbb9a58d78de6786a1a9e01b5df2a342fea5d60d2b304cadf6373d97f. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/FR19X2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8696ec7d315b9d99bf77ada6d58f383c8f35b5fc2139e0aa4c394e35127b34c6. 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/FR19X2400021.