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 0x7582e58723e6acaa2eccdab49b9f3138272039be0b8826704e1c02c292af00ed. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf07b967-9782-4cb1-b5f8-181fc7e1db60.json and https://artists.proofprofile.net/proofs/artist/cf07b967-9782-4cb1-b5f8-181fc7e1db60.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 0xf8d09844a58f17c9857b336ba3db978faba4a1b52bb296ece7b515f52d8d7fbe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN32037853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94bad147bec5a9324221ef904f45cd25306fa98490aa5f919b4a14221216a98. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHN32037854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1619571d3b6d8a390d6a5218192297fefdbf8fe0812bd069a237e3b8cd07ee7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES82027536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab1c93bd44821245894bf99cadf815cd3e3997ccdc48af76ae811506606ef64. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32037857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefabaa2a9361a7d43a53127d3ed9d36844d15075c7ebffcdab0ef40e81e4eb6e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:34:08Z), 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/QZHN32037859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e16c8fd3c611ec94c112d5b954fdff3f18ad73adaa5998b990e77d0e7d334c7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN32037861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6f1ea8e2668a91535d8f29d519ec51f174d18bf663d8335a4a9f3be22610ef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6J2147019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5d85440b85d152d27e015c71a0f857fca794552a301582b9c8b03264fa93f2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32037868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fa3037764a1bec356420a68ba38c16fccf39fe3f96ba7213fb550075c40142. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32037873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1619571d3b6d8a390d6a5218192297fefdbf8fe0812bd069a237e3b8cd07ee7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES82027536.