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 0x1dbdde1c566aa1bd8c592c8e93cd2e20fbde51f959754e56ab0aaddb9ffa7933. 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/afe4c62a-db19-4303-9151-479f0c367168.json and https://artists.proofprofile.net/proofs/artist/afe4c62a-db19-4303-9151-479f0c367168.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 0x536e18472e89dbe8a642393eb0a0575d521d78d708f0613fcea06ad69ced7762. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:29Z), 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/QZMEQ2246751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d03c16d023950a300b6ae8ed988dc8d517a8768da69c75abecfd0ba333d08ca. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWS2271637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4795d43ca2d2683d3ffc94ed8b6196f88a5a35c2e557482cad544a047e26bddf. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:01:44Z), 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/QZNWS2271639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91820abc928495086aed2d01f0125f8fe4757ea04be53bc079b239811a13c11. 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/QZTB52337257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6236bb2b55ae7d424c8975f2adfbcb76588e007de0cebcb4e4384224f7f4954b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:30:07Z), 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/QZTB52337260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b495aa1844850168925f48ec75210ec83e3317734bc4c428516dad48f66901f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:32Z), 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/QZTB52337262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57297315099ba72fc22d53136b6ace9a320c2e7f83f25f23198065cfa170ef5. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6P2356646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e95624983dedb664e89f55f6b4b7c0bbb64fbf85cf48cd5bdf0be7a6d0134c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB52337258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb966fda2ad06252698766d6d7715d3c83facccefba5cc13cdf1f36b5ac1d6ea9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB52337261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59a0319dc641c23dd208abe6010dea25ca499de6d2cf06137ab9c086290191d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB52337263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6639b79a9af7209a9eb5bcdf567efd55e12b8e8de947cb4ffbc0c2bdaaff9871. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB52337264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6722969a8fbeeb4c3621c84bc07934fd88a3be3246698d242eb77fe8c7245fc3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMER2470081.