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 0x41a199401a8dd1a7da3b760d43dad8dbcfc7bbb1763125e6febf3ea214ac318f. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afb85f6b-4f91-489a-9b10-7768395d3124.json and https://artists.proofprofile.net/proofs/artist/afb85f6b-4f91-489a-9b10-7768395d3124.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Surf Sensation (songs from Nickelodeon's SPONGEBOB SQUAREPANTS)
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 0xc09048ba54a3e11e1a0616bf0abbfa85a79b9dd44406e255ec53a5f5309487e1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USA5F0410215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3173bccda7d1bb36e0dd4b6ea5c1fefc512bf60852be889c7c51764ea38f8217. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USA5F0410218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce25aed008cf2e0d142ec8299aa40f8bd8e8b0c17b2c66a89e34c782f087c3d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA5F0410232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda083c80be7508933aed346fa87bd846cc8fada88b05fdc523953a17b7b8e39. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:00:21Z), 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/USA5F0410239.