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 0x4cbab8b91ced8554bbee59fb32b255fa79e8402ec586ad9f998f60d7316fab02. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70dcda7e-179c-4a71-be20-cf5dc4e9fa57.json and https://artists.proofprofile.net/proofs/artist/70dcda7e-179c-4a71-be20-cf5dc4e9fa57.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 0x2d061501baeacaec0f229d64558102faa9aa34ebe839a5a9b488c2494c96459d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPPO02004061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67545ae01b70838a0b3b41f38a771465a3d0cf1ec16560517123c850b029c64b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:06Z), 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/JPPO02102068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d0be294c7bcb370afc34bcf1034d7a7f7928a12ee330444cf66af6492dd8d6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPPO02102066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4ab0f5c1564e99c2755f5d43f30dcb5ee0a9ee6529e86c29949e50150b159. 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/JPPO02102067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9089e400b05cab94eb02f19f0126ff4ad16254b28c06d9698a6d0e8022e3e1ee. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/JPPO02102071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a411812d97cfaf27a0c0d3477c2595ebe1aae260419904f9ae0ea279b4f167. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:54Z), 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/JPPO02201785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29200229d2404c0478724f33d0cbd2e67863775b3e93ea1f9ad9238561b33ff1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/JPPO02301572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f894dd8ffcb64d3783876e807fe184b70993c94d24d5e279ca71ffea94a1f4. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/JPPO02301575.