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 0xc2c9c8b4534022ea027597d07450a6328cfcffe41638ab7a694542c54dbd392d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7488eac-3470-49ab-8e34-fafb01e445e8.json and https://artists.proofprofile.net/proofs/artist/e7488eac-3470-49ab-8e34-fafb01e445e8.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 0x8fa0ca3060f7079bd8775cf06debf2a3c48a4fe420a31698e1a4aaab94ced18d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPP491512010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeeb2ed54d1e4a50dae6187264b854423f2c8e5697b15ddbbc0d60c18f40a9f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPB622401722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146de32bd7ccfd683a8d129ac07af816d1c0db38735f682df4635056954ea328. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:38:20Z), 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/JPB622401723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb25efef9e657eb19860120844daf86dbed47e5ecfa661a9a1dfe517136658d. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/JPB622401724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04351703495fa1f635be82b9f7405770339132d5deecd777e6d2b8fc45b659f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPB622401731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e87e12fb5e73328f6e8e506da9f0291a49bc229029af2e2c7c77c3a9e560f2. 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/JPB622401711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db4b628f81734bf9f7e4d6fdd59378b14c90c8298c22fd56b1fb896c5253691. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:20Z), 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/JPB622401712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadda4879204c41a04bbed310e01b79b3aa50d80102118e01b011a64abe359ea. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPB622401716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3ad0a37aac2efa94a5f597c9f241dcce32eab5147a0e74891fc12c412c308. 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/JPB622401721.