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 0x1e4abd8da8b0296256b5fe3d3094c48502e9db64e0f4c7068579f8227b1e9d6f. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc9e576d-f2fa-48ac-8066-dab707fb3f82.json and https://artists.proofprofile.net/proofs/artist/dc9e576d-f2fa-48ac-8066-dab707fb3f82.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 0x08dbdf4a26f7ff8f66612e6f8efca90159473fe8af2b09942b7b6ec9b80f697b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:48:09Z), 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/USL4Q1917062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de95cacf6e8680e8f463feb18915dfe67f8e1549e83c329760a144fe2861177. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USL4Q1917064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4504fa95d98087aa05f24050f77708e2f7ce4bc6c0c6c0ad78cd9991d7555e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:26:33Z), 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/USL4Q1917065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f601753b621541eb7a38d3053e3fcbe28c1e2bf5b368ab259de939e99af093. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:04:15Z), 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/USL4Q1917069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ac42e07e409fad2e996bb19b08a9e7b6c251093f76854b1cdd6b81065675bf. 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/USL4Q1917071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8357018adc6fae663b96f428dfa5c078976b93433674737b36a327104d6695b9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMJG2435964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8a51dd99e071c789a8f72c257de98560fcf8cb1c8ae0a60293644f14ba9f7c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GBMJG2435965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee77d1feb39bac0132a194656c9a6488cb305f18848bb14f1bfbec45c299fcf7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBMJG2435966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c74041dbf7c49af7bdc355832269c3b28080ded6730a3b2a8540565db232aba. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBMJG2435968.