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 0x525502cf2a242fe66e0725bca7b2dc927cd47e6edf4ff84972b4fad9b296ef0b. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb0e54cb-00a1-47d0-b921-32a2859a6527.json and https://artists.proofprofile.net/proofs/artist/fb0e54cb-00a1-47d0-b921-32a2859a6527.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 0xb74518928b9c805865900d431ce0ebba5f46f721e929e5c4f47f34635f8bfd4c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYY2139859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938ccc3282a4664a270fd3e2f7e8c523c4f709f54c74df0873fb413c6e5fbf7c. 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/QM4TW2234100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee70bfd9e9cb4b387369691d48f5ec4ab687823dbb3f54abf1f91e97ac57494. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:32:32Z), 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/QM4TW2252987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1f2ab939ac967a373bd0d6ea67f03bf0047386c6d0c4e7af8a9345d30c79dc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEZC62266265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b86b1bc8f940deebb995ad930f5aa5aed8ec6913dfc5b0be86040feb9160a5d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:23:24Z), 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/DEZC62211477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80abf1afbc40dfd42d5d4eb6e44e973358e99f0494bf5a1b27e7fcd72984d6a. 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/DEZC62317761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38fe92efe162931e492da70c564ba2d7caeec8fb79b5e9a07006c8ef694b86b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QM3DF2290783.