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 0xfb7ecf3ca5f579e9357d2110fa68fa9bd5266d5b2873d4e62b8ab0eae401b5ee. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5befc251-3ed6-44af-b5f1-821673719e0a.json and https://artists.proofprofile.net/proofs/artist/5befc251-3ed6-44af-b5f1-821673719e0a.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 0xb0246a9d60954dd28323bd4f665f7542066f721bae799f02836271d7ced476f6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USAK10100831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe887697790f526d83f3f87d0155cdf87c44a40007a969fe4b3b76c939e9c0b90. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USAK10100834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0820423ef9a60bfe60c99100692ca0bffeefa6240e2aa89ec73257276ae14da3. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/USAK10100835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb4797d9a69d46a19e566d7d4fe3fd4e0e5364ae9b436437e34a73b053e50af. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:42Z), 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/USGN30600193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5f4afac3c2177ea039e7f1276597a1736934252f0bf78e16ef606e46b69b32. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:59:06Z), 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/USGN30600194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bfc2a68524b949cb0926935445f78442477d6c77bfafffde80a436f385b248. 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/USGN30600195.