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 0xd6facd532b9cabcba98d4d79a7d71e1c2711a688d738e4826538daa771b07e07. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/862eacd8-b2e1-4dcf-a735-67216a6bf353.json and https://artists.proofprofile.net/proofs/artist/862eacd8-b2e1-4dcf-a735-67216a6bf353.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 0xb857743b3bd29c5a288ed1e8f51bbd6f0ab92bbf87e206d40bf5af1d835e455d. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZFZ41995103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2cca6cdea96ef19290d2a07c9839e68fecd4cbed2d14173841739ae043c0e1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWW2490961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcae7035ca80e0cd91d4225e15347e921158e1c03ffad9f0b10ef5c68ead7fd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:52:23Z), 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/QZTB32494684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a634c3a85325b1442a259e615ed7d97feeb2d87f07ee6bcfa8988a1edb1f069. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZZ7Q2434426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b9e595c82a7ea987d0ad6b8bd8bdf036a024a46b5014a1b30e11bc9ad9f6cb. 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/QZHN42548809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0712392e0cc66d242f167ce47bd0f746450744be21dc4e8968376ba1739d609. 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/QZHN42548810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd671ada86f01c364fec95c0050bceeb66b3f955ebc794b11d99cfe392e823462. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:52:02Z), 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/QZHN42548811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbe764326b71542b8a6e00cf4e6ff7f0c0bc01e9164c83615968364d2e72239. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:26Z), 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/QZTAS2585926.