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 0x57fc3fa62ced886c8deec51b9581f1ab990e62ba1d734b0a43f91d463b6ac721. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0fdccb3-ab53-4254-b346-eff7521905aa.json and https://artists.proofprofile.net/proofs/artist/e0fdccb3-ab53-4254-b346-eff7521905aa.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 0x91dff5a8b84e24f843461a97e7ce996b6787d412504d5aea5e28b22c87d5d65a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAFG2027834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4be15f200b24514c266aa3d09ce87afe42f9bc6b5d9be068de5a4ddc1665a6b. 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/TCAFG2028387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c029412d9f921e96aba25f183e2c99b9c37fe8a7397928218bfb5864e2ca967. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAGP2227527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de2bea3c7740134edfee92b1a6d677d6f29ae2b4ecdcf10cded95bfe3a5415. 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/QZTBD2489473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0aba129a2922cddb65343cfc82d6396fd80a0aeea7d11e3bba2b998be1176. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:52:48Z), 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/QZZ772410539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e3fa7b42088ace819fc24d2243e03e50f29e0e24ed9566b05126c5114d6c3a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZZ7S2464370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46d1ccb7b58d95198bec27e103d194fbafe5f96151219c158358281b5ba875c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2561938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a22acd8695bce12b377781678684c7ac33b226db095abdeeeccca9da4d176c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ782557626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580436a0823c5ba0f9a529cd5328f52e4cee28ff40cff09cc28e87458321d4b5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7X2541354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833c74c2861640e52549aeef15f349e2b20b881e57494f3da7a3a7c1a0efef95. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3EY2570986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28612e72269a1aef17d09cd4a83cdb8d3b5ad2aa9b9186815306ed835529d840. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:31Z), 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/QT3FB2586369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5e1f5e28e7653cfdb91439b6234b6d39f35f5971e2290e0ae543750a56c66c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3FD2547438.