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 0xf9c1e6d48e652198c9c2155353ac06d8b88bc86d4491447866115b2621c6ac1e. Chain 2 (Bitcoin): anchored in block 953681 (2026-06-14T19:31:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63f7eb4a-034d-4734-8501-6d9fd0974120.json and https://artists.proofprofile.net/proofs/artist/63f7eb4a-034d-4734-8501-6d9fd0974120.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 0x1db49356b0843fbe5ae4088fbe7c3cda3ac5a3836a4a9b057edf2faf9f642e11. 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/BXF622300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d226ce359905b75bf7d3a8779a0e144da935de82fc8c2e398d092166f5af48. 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/BC1BG2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780a8672cee38c18894cbde53207990040de23d32c77df6033d65aaca7e45680. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKVNF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfff3cb92f8d87eda17a1c700d238ebfadeff938c104ade93ba1f9c84bf976d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJY2481774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a344995ba1b3163844f812eae9453642e9ccb5321e2031ae3bdb2a1aa90bc84. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/BK30M2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d226ce359905b75bf7d3a8779a0e144da935de82fc8c2e398d092166f5af48. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:22:19Z), 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/BC1BG2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfff3cb92f8d87eda17a1c700d238ebfadeff938c104ade93ba1f9c84bf976d7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJY2481774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bbe2ea0ee7a46391a0f35d6f0da9d401895dcd1e8ddbf14908bd3c492d393c. 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/QZTVM2585498.