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 0x3d6629b87981e1d5260a6c4f7ea24e52b6f2f803b2527eae1bbc13ab5a45d840. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/892d5a28-66de-466a-9d25-0e821b603027.json and https://artists.proofprofile.net/proofs/artist/892d5a28-66de-466a-9d25-0e821b603027.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 0xec170e6b5345c0859ba445ef9e16d3c79a8a4941f0566427c421c7fe5270fda5. 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/QM4TW1569377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1014988cef22c152215fa3048c82ab16fe5e53c27bd890a00af65ae8624877. 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/USF2M1500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77be0c97d9e5d93e55c9272d57e494c42cf751b21d9af38725f1fb786fec3e6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USF2M1500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060edced056c34edd93b6252310aa59cee5a75d6e842d04760e8e5a3556d1aeb. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:08:33Z), 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/USF2M1500517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f62a49f3af62f6d7c1f7ed4349adc40ee8ffa14ee1e17605af328676ce0b3c. 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/USF2M1500521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7952e27d2b4f6600393574c98eaa431528c1c02e2f733051191619231fb97431. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USF2M1600562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a78b71d9b458f2f384ce3d4598ee13e58f53caf831016a109e88d6412d4851. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USF2M1600563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12288c17288c450c35f6d41de8054a9a3afd75ea6e7523c0750411bd8cf34377. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/USMRG2070501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0ce724360272e4011cd834eb2611aed8d905d6d8d71df2577702be71eb26ae. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:55:49Z), 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/USMRG2070503.