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 0x5730162b3965e876abe5d4bc2d17fb2f15134b1f50ab9aea0ad4f1afe80b1645. 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/fc9ac4f8-27f2-40e4-b2e0-38d941959c2c.json and https://artists.proofprofile.net/proofs/artist/fc9ac4f8-27f2-40e4-b2e0-38d941959c2c.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 0x6f01ec553a477f2a32503368bef6fac85577dc9488f0d3428fbe35ad0a8a30f3. 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/DEZC62387222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028b64cb85381e6a16796dd4c2412f3d9422f580a0b12895bbc3c45ee59a1da5. 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/DEZC62403142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ee8b425dfb9635e37ce442a3658dee44519adb090f8642df799d8f04fd3673. 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/DEZC62470205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd144d7ef6d4b96f64e70d7bd9bc960193b0d10eb952175045f79d8b53210c9c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:00Z), 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/DEZC62598968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8702b78248c1d9b809d004917035492bd713289d555b099c44431b9a555de684. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:51:07Z), 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/DEZC62599104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2707a7b354b378db3e0d7cbcc172e0820fa26bd1d38216704893e55966315b70. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:18Z), 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/QMFME2596130.