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 0x364dfbb4a5d0330daa91f904d9bbe567c6acdd868c19dbe6f53e0cc6d326b6f6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a381944-b595-4f7c-a7fd-2c6438c3cfcb.json and https://artists.proofprofile.net/proofs/artist/6a381944-b595-4f7c-a7fd-2c6438c3cfcb.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 0xdc1cf78d5afebe3244e1d53ef61b6f87d606f3622cf502f7b873570164602194. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:29:21Z), 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/QZNWT2132654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6288f4966b7259ebb48e03658395e4686a61c75c4211798897129cb53d49598f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6N2210763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcbc510bde7d61df22fc696183b396ad6d7cee5ed4cd4e23198df0cb45cfb1c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX202298752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fc92fcb968ee9b5c0083c0fe5b25901b35b4959ada65f85c0d2e870afc3ced. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/FRX872283549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9447990c2ac70bfa330eaa83496086b07878d267558fb00b15c73e37eeec5309. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DGA072273038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574290ae1e22672e4f2a1562d78083f5cdb2ad1bbe2362aa5de11f3d2dc91c2. 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/DGA072273040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3994cb3d6553b7256edcaa7ea29406a09251d792ca8ce7a8a84ff30c441cdeb7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR59R2340139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aa64c559cfb97ff11fa8e08d57e202f0c1f586222d42daca06e4e2535fddee. 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/FRX282392300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8dadcf226a01655dd463f5f60feb9593ed0bb0bdc52a03297dc9385aabfc99. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/GRSTY2400270.