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 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 0xd4b974f448611f2b1115a13906ef7ea256bfbcddd0d64945e5a08a0b202e84b6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/895afe8f-392d-47bc-ad8d-0fbcd85796d5.json and https://artists.proofprofile.net/proofs/artist/895afe8f-392d-47bc-ad8d-0fbcd85796d5.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 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 0x63431bbfb3c21b8e4a3025631043f6efacfdf25b249e61297d520f7ea29bcfc6. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/CAQ521576302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c111c3725a92b402f33b03321742810de97bfaec85749510ed9776d8b0a5db. 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/CAQ521576303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea293209fa845c010c835437cbb4ddee4a3947a81782a1bef363ec23be10cbd. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/CAQ521576305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6376d81ce6bae0d92f35803606d4afdf5f0f05cc8237ea8ef6896861d0f39993. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAQ521576310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac7c6efe7497d6e9eeed0dda730394b3ea437da1a9efe30a0ea6a34e8f2bcf9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CAK721741599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e39e567764804a07879bb3139f051364c894d1856feabb2299e70393843b0a2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CAK721941811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32082f7d873259dbec63b91fef43c8083b87dc8379ce3c926c0899b4d639316c. 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/CAK721941816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17cc652ec62c49a079f9f7b98e77a68c80856921efa414e32dff59d4b44cebe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAKII2203001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17cc652ec62c49a079f9f7b98e77a68c80856921efa414e32dff59d4b44cebe. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAKII2203001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1991309bf73296028a0b47b002ef472e5c7655f0bfad5f455835f707239cdbc8. 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/CAQ520997306.
C'est mon histoire - Hommage à Renée Martel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759b6bb6a76f92bcc98564faf1923c9d26331f074f6bd86592697f362e7cf3e4. 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/CAK721541101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3daa923829c355ca4f1ad79dee9264318e4e3f12aa49f8159ceb1a4c4bd100. 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/CAQ522154002.
Le meilleur de Star Académie : les grands succès de l'académie, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1991309bf73296028a0b47b002ef472e5c7655f0bfad5f455835f707239cdbc8. 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/CAQ520997306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd913b7ab350ffb47b470528324daa7a25a981dbde0daeccf6d92c0f9c1aee6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CAD941184907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604edc86b2e42977bbfdd63cea092fcb38d09d853d64051b96813c38d9c3583e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAD941488004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f90ade96179cd7a73651f37987ee9761422dab8712b1e326617b86e330363a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAD941488014.