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 0x0717d50a61550b47b090012cc7d0a74b3a31f98d434b89f783a27c31168eb74e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b25a927d-815a-4ff4-b6fb-e3907cf20c7d.json and https://artists.proofprofile.net/proofs/artist/b25a927d-815a-4ff4-b6fb-e3907cf20c7d.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 0xc76e8bceba9cc23214493f2b0733e00cb046950c4d2498345d8a09bae1a2d59c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:03:53Z), 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/NL8RL2443892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99e015f83ec7f48ce8dae2446de4fc42de9e21d8b59d9f2ab152f759a0032e. 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/NL8RL2443893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1996e4bb543941279d9d4e3adf5919948badf61e021d4215d1da970aeb1e80. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:08:08Z), 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/NL8RL2443894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8006ff309c82d97c426f315f6c25c9fc118b12ebeec8f9e000dcada30e47a719. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL8RL2443895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f3f030733d39974afad25f7d1e4b67893e09d26f3fe4878f2668d5c9c4978b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NL8RL2443897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb276321dabc6c515499dfe4cd585e24c047644950f1379dc7c9a36b58f145962. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/NL8RL2443898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf00bf4b7b0a24b5133afe96a12ac2c6ca03fcd6313f39cac7c7e07b5db920f0. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:06:38Z), 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/NL8RL2443899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668c4c3831df91a98fb30fcc59ee0ced77898992f14ae971eda3e609948d5279. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:42:08Z), 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/NL8RL2443904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b763e74da32969ca03162641bdf83037f67f2e6edb2606c2b65ab61e44b366. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:47:49Z), 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/NL8RL2443905.