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 0x9751603888740d961e40525b4c0b5cb359ba3ff63c2ab38105c6d3189b05ff33. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5939d00-6dd3-4b8b-84c4-b6ffbefbdfde.json and https://artists.proofprofile.net/proofs/artist/b5939d00-6dd3-4b8b-84c4-b6ffbefbdfde.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 0xd3627dfefcebf48ea430ff511f0b6ce14b1ad8960bfa7ce6486ded459d133849. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:10:38Z), 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/IL5841926507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab15b921bd901545137f75756e87d6e46b08d2225a1a530bc1022a8e94359b57. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:41:15Z), 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/IL5841926509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69435d48f13371692eec4f33e22384bccfaffe1588a3110fcff35b3e4d825db8. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:47:40Z), 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/IL5841926514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f44a4a97ee14b826faa9b1efabccba8294523793b34ed2d6c841bbda85b7f0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IL5841926515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25002bc59ced730521a758843d73f778aedfcdfca30aeeb148c8b2183af5f357. 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/IL5841926516.