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 0x04f8f46bfdef6095489333c298fa5c9f407c9bd542080bae33671d6e58eeeb7a. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dbe6438-473e-4b74-bcac-62d41aabefd0.json and https://artists.proofprofile.net/proofs/artist/7dbe6438-473e-4b74-bcac-62d41aabefd0.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 0xfbcec074815d95502b486bde380670720aee754b0725f5dbab0e4a001739ef24. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:37:27Z), 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/QZK6N2554133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f91012360d43d3f29014c3fb969ec82553a877f441dbeba352a26d0c21fd5c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES72528997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50971e6d4d8c94453ed3e1765f70faa9ab8aaf6fe64b5b63ca34917354dbf552. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES62563477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fa22f48e91549dc9a45850aea1df5fd4d328fb21ca3134e3062b011e480016. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES62563478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4605b2450c3c2a9de2067515b7489609c7f3fb67b4dd3ca31d8e265ff7154b74. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZES62563479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc989488631c9ad519e1686683c6fbfa071e9f38a05537a77eca6ffd278d091. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES62563480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e398851a2e8e319347fa73be14a44422aca22cffd5b4e20de0064821323356. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:51:30Z), 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/QZES62563481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b689b03b5a567a63972904f392f43e1f6980c6da5f944cc7963f5ee130a2e0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:20Z), 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/QZES62563482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a63bd363cf064563c6b2555112e36a3124c3a1b037204e29f20aaaab7a6e3da. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNWR2508822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a1727b302c6387916d071b7f510569724d993f1c57a5da7d3327a6c712d57e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:13Z), 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/QZTAX2510263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b170cd55a42851648d910f0e9cd77317c537480d7e2ed3bcfa7d08aa6e0262. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ7S2592932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c10967024e8a4e8f776259ef5a13bb4634734733b1570d0c220e0d9e3dcd2a8. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:02:25Z), 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/QT6EA2539842.