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 0xba4655252e7bedb10792f22fd48ada446ee69d3e56acb9b2c7c5b85566c7c5a0. 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/fb1e5737-6a5d-4479-b3de-005681481cb2.json and https://artists.proofprofile.net/proofs/artist/fb1e5737-6a5d-4479-b3de-005681481cb2.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 0xc109c51ad2a1e30e08ed6c2f72ad6a8e60fa66bef13a266d6b440454daaa6276. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DEXG91900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebcb9a6eaa5a25f93f717d90f02652c2d734fc6fec95f7f67e191b5ebdd4df7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:23Z), 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/DEXG91900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc109c51ad2a1e30e08ed6c2f72ad6a8e60fa66bef13a266d6b440454daaa6276. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEXG91900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbd8714ccde27746f79f9ef283fb59ecb0d0e87c7e5b967bdd05f42605df79d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEXG91900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebb27cdee64c2f5e86813ea833ac72e7bfd2e9347d5d488a9839507a2a38d9f. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DEXG91900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6bee6a8f3cdbbfb37c5130b487233c4f1c27e413856c4f3f89bff8cdacd180. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH7812039623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788958a77aba8ac1281f022fed6deba0b18f7f0cf3679b25425b6b19daae02e3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH7812042147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb973b20b89db80e884d4966b0947c98e6b1c96f70e2ece5c6625f69cf0485445. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEQ022009700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf31d61398f6d1f2f7acda22cdaf3607102893722c9e3a2c3845de10b61b3c95. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEQ022111196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46816d781c272336aeee28c1e4ca74a08d8a1edbf814e5e5e8642ee6fa984a1a. 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/DEQ022111399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda9e0548c1786203e67d6f65dceb86ebd1d2fb72c58737125ed23f4e7f7191e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEQ022119273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c78f0b1fed84ea6ccb2c1c3e59fc43cd29874174533048e6401aff47023684. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR2X42449190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aefceeee00e7b30a857d08a752bcd6eb6ef6e7f79f4067d51e96502fd44ad18. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR96X2438011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe675eeb41aca01e2742004d58f9337928960bbdf50e6b301488d837dcc21571c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FRX872425799.