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 0x7cf0af5e163f9379b2cc8f9d973523fa0977cb749022290a62577a123e7bed83. 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/35beaf2e-4ecf-4859-8c07-e038b7447c27.json and https://artists.proofprofile.net/proofs/artist/35beaf2e-4ecf-4859-8c07-e038b7447c27.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 0x01929dfefb89612ab9030103071af8c78fcb952a960784158e7b8a79a88887f1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:26Z), 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/TCACR1679610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64561d86224256899dcec31ad80168cb2fd122d0cc8549ae174c7a2148ac6efd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCACR1680963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a44c748a3b6dcbe33c03753bd19774b0454f6077ff094e23df65e16859435b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCADN1834978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe633fd81746b343c396adbd23311bab288424c8d3a71145924b24b732c955a13. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:40:17Z), 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/QZHN71920137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e8a45998c016a8830694953a458a708ec52e940803328aa8038f60917f3327. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKPL2096802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fc40750952c0dcf8f27fea5fdf3d59009a0fd035996b6c6ab4331eb0248e10. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBKPL2012167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef7ec6770a3fb84d434d34e5157cbfd9b7a029e09a599ad3ab4236df1683586. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:55:06Z), 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/TCAJH2540210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04364e6492e625478db69840f80ba08be7da9141a249e72b31340ceecffbad34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ72085634.