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 0x65d250c62118b674dfe0e28f6ec324a906a9b083fa5cf273c821c6b618ffd5bf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66c6b8ad-49ca-498b-92e6-cba7fa9de490.json and https://artists.proofprofile.net/proofs/artist/66c6b8ad-49ca-498b-92e6-cba7fa9de490.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 0xbb8c9d479c8cf6fd8fe4c183841e80c2fe6bc80e9cc3a1518ebc9bab31d08f0b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ22B1981299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04c6ff7567a47ede3db3b071094475fbc832ee892c87a1ebc56142bf95ef6db. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGWW2078314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a43f3fa2150f641ec6815153a1cfd35a23b784d86218e0eed95f9868d5fa6b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZGWW2078315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173312c382d6f9a050217503157492ca8065a60e97f5b74ebe886919444fa3c1. 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/TCAGX2300755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3342be7dbf28c8a44be556091a0c1b0609592e7e3116f772107531ac93e4ab. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJW2310286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f0b3a0c667cfce55dd191d2edf1f637d233ba7659bd309b7ed1df85c1a3b96. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:16:59Z), 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/QZNJW2310287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7415c1cf4771f791f993e0c830dffc21adc3cc7a4f4aa35c7b086520602f0e58. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNJW2310290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe39ca3866875db4d18f0f30641061bebbabc306af850967ea7ddb07b8eb49b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJW2310291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc1f40b06ae616b0e9082aa78ecebeb188e1d079c70aae3b4e8dd1c71879689. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNJW2310297.