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 0xc47c4451a1d736686f28b76599f1d56b55b61f4c0dcdc4c71b82951b226fd40e. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad500276-44ff-4cfe-b97a-11b99121d47e.json and https://artists.proofprofile.net/proofs/artist/ad500276-44ff-4cfe-b97a-11b99121d47e.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 0xf9cfd12f44118180d46c613d3a30fd4ac87b923f4cba2afe96d6a698a41bf064. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ972487516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ea78912bb81fe62245b26d0010d8757ddd5f28331d6bd577255e3d432c3f6d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ972417646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50ea5f9e234c2288efb475e60246aa850290fdbbfbada67012d7f0e27395308. 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/QZZ972487512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86f2e4cabc402fa8663f9a7c15dadf40f5bcb09ea6aa9fb21d4de7f524c3db8. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZZ972487825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5000ab9c804da3ef7926322c71a578673aed05fc000585091c2572996d862c3. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/MXA3V2408427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd193dae3f6fd053d2265c900b39a44aec7b310ce0a358937a169393e4804cddf. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:28:37Z), 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/MXA3V2408759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c138b02d19f6f4b6bdc90670b78916a5a778cdf812a6206f23c3df93d65ee8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:15Z), 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/MXA3V2409490.