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 0xcb40c0b46f7a3bb36ef5268421fd599bb8e998d3d162a4832fdceff5e28e17db. 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/ec518ccb-0c21-4155-8f13-31dbdade5d0f.json and https://artists.proofprofile.net/proofs/artist/ec518ccb-0c21-4155-8f13-31dbdade5d0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musique Contemporaine, Rythmee Et Improvisee (A Special Radio ~TV Record - N°17)
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 0x1fa17a4988a094e90de07662208c76b85c07646508c31bf24e67a0b00cefe0e4. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZ4JJ1707622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8f5b2f9532562771fd95f17c608439220b24cc54baa9ebec0c0c0e923930ba. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZ4JJ1707623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d214b65efd3b225d79fedc54a46708d79ac98e2386841aede3bc8df61c60f1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZ4JJ1707624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b18b380b2533bc06860d9f6a0008a20af7808c2fbc918f04ad6314def317489. 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/QZ4JJ1707628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ee429d15633ad568e6986068ae2485bf3427e029d68d346380e10f9d88c63. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZ4JJ1707632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0276f5ec4ec0d6e5f1a57b5e86ac5bd850cb2fce65145ef0a710aba0f01ffea. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ4JJ1707690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb000b99762ed79c1c03afb761bf8fae829f41d2dbd61f6d0dce56d5fd91fde7d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZ4JJ1791259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ea928e1c999860097f92a3b4fdddf858a25242911eae1e12a87713fab1978b. 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/QZ4JJ1791260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8150657f1d85e364758a2b039fb08a7201e9493a672203b863141efdeba3e9. 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/QZ4JJ1791267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7de19350629fac759f274d2ecf30d45f3126b55acddf3140bdd296940c8d1d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ4JJ1791270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d3be68f4c091910a028c7c636f5a9763a5c5d4c12cefd71ab4cc2f9bc54f3a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEQ2525292.