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 0xb16fbb95322b6ecaaf892af970d27832ac09536aa9ce26d9df59bb4ee097edec. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7c5ad9e-90cc-45c5-bc46-80be4444641e.json and https://artists.proofprofile.net/proofs/artist/c7c5ad9e-90cc-45c5-bc46-80be4444641e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ramajetternes Jul (feat. Jan Rørdam, Nynne Hansen, William Rørdam)
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 0x69c9ddc023ea48993a352102b36fe86afe7bc7f3d97bc85eaa9578534f7a338d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DKCA41700801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb013e500cde6897b9aecb993d93ed960919a0390d967145d059a8d39649913d4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:04:45Z), 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/DKCA41700802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84515098804c68a0eb9d73282ff0bd08365ff5b4845e0bffd92c70f64d4c140. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:30:43Z), 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/DKCA41700803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fe2dbb0921cec242f4e188fdc055a6718b3ddd150d3f831b9a1b4396301bdd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:41:42Z), 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/DKCA41700804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5d7bed723c9afecab42f923d80740e316f7b1d196fdc1f812649523b981aac. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:21:22Z), 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/DKCA41700805.