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 0x6d565924505104a066d27d6265a9c4b0096eff76a784f27f3fdf9210abfaa21c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be685330-fc1d-4a8c-90f1-654d320ab274.json and https://artists.proofprofile.net/proofs/artist/be685330-fc1d-4a8c-90f1-654d320ab274.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 0x8aeff95643f4eadf8fd8ea1ce0e5519a30b848cae53e91dfe2ee3935de2872dd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:04:27Z), 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/QZNWS2265754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac7ddd0b034ed3d742423d2bf829180e7b7c1f0a0dccbd36065b9c9a03c11e3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFJ2313209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d81c5be7758c9edfa9b95b88b5e6cdc7f813d403946312791a800c21c741d7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM4TX2433181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880f29d402bd2fc533db88306f97f7bc4ad40e1a904756ba3281f185c710ec51. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TX2463630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae672670b453a196dceafb039598a31fc11ecb8775f9bd7d1e8bdb66648a86. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:55:47Z), 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/QM4TX2463652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d306edf89ac1561796731142366b8809027e2b0971732ed8b39fe078632fd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:38Z), 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/QM4TX2463655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffab19755cbdf2952652180d0e7b47a4809ce3828349f0112f00f8a6daf9d27. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHNB2529310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c6a2f7271c048d9678fdf61e5d4b6c9500736956887de66b60560a593cd78e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMDA62534465.