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 0x73df8151dc95cb3e1084962887d1a84dd999834233940a8d9d767429dc05df0a. 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/75b8a9ad-6acc-4e09-b058-c09b65dc9c2f.json and https://artists.proofprofile.net/proofs/artist/75b8a9ad-6acc-4e09-b058-c09b65dc9c2f.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 0x9e508b3031277780bc2cd18b53cba1aba15215047aa3b95497a8282399520f5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLEH50900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20edb74117e17fe5cfe8e1409089a349f32fa50a2f280e7c4237afb4ea2669e2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLEH50900003.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3303aa961a8fb1f7f696eaa1a5c0b696bc7db23d0a757d6e6289a1eb0dfcdb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLEH51000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af81249787e627efa2ea72365b7dcae8f76889f144727d3613cd3eb5ff7883. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:34:06Z), 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/CAENV2328614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaff750f28c22cc83a39b3d2c9c6a41e11b2cdde53aa3b15f324a8c4c57f9d8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAENV2328628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31990bd66d3919eb1b10e0bb18ce94bf8753a7d0b1f54ad96488d4df557e4800. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CAENV2328634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd5c47ac7d73477c98e2ece151165bd8f2ffda61ee0eca950c83a221647fb5d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:26:07Z), 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/CAENV2328636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b1da0a7a043d4090fb25ca55a804c9f55672612f1b4b5e8f945e4fdedea00c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAENV2328642.