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 0x8fe56b679144deae4c735ce84d466193715c25604be8dad34c7c9090f5a38730. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3583b993-b0a0-4ce4-8d0a-d0571bec396f.json and https://artists.proofprofile.net/proofs/artist/3583b993-b0a0-4ce4-8d0a-d0571bec396f.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 0x228849e2e0fa705086361b373edb1f7b6bdfee9649c8d5cbec64f7da755bdde6. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZTB32202036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad11ee751ae47b4cdf488c1b921d68e230ba9b703c7d1992e795f56c82337b1e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2360609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4549372da02cc92e29d67367d1c7af6c63997f8b861e1f044f3335fbfa00f722. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6H2452578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9096fcca2b60fb8282c31b85cd6101abca0ae78bc6447eaefa53daa7772b70. 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/QZTBC2485910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25ae7bfa32286102ba2af938704612b4d70a5c79f32be1ab58d97389a853671. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:36Z), 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/QZZ7T2403908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c110590315b7435f22384752fa72ea0521c5d1391f10592db512d5b5c1c9e59. 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/QT3F42418449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be3db43179114a7f9955084fc65232090b8e5a58ec3463311f6947f454fffdd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES82504683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f1bbcc99ce9b10dbe644e37ba774a49414b1651750663d7a7f4a92d7020ea. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:56Z), 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/QT2VB2516004.