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 0xcbadcb8bcd91c8ed2dee54261efd3ad1e0ee599f834e0e8d3174ef975a868090. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1f1f90d-ba71-47e6-ab83-a8bd62b2183e.json and https://artists.proofprofile.net/proofs/artist/f1f1f90d-ba71-47e6-ab83-a8bd62b2183e.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 0x3d38f57a1b6600f4a455f09a1df49c566f40a1b11af6ff58b7dbf2c4759d7510. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEYOK1840346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2559be3c52c68635d602b128c7d069826116ff2d90e78206c365db2e3f9902f1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK1526606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41e303968f32446416f5b9ac43adf08e4cba017bad7fe1b370bea77008b76d7. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:02:55Z), 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/SEYOK1420041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7d07007c9a346bb54ae8db509e53ae75ccbd8205333a4fb044e5f03a2bacdd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEYOK1610286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d955f2c20a7dcee36b2ca714251a35f8a3d91b81863b3825fbf1988a009a76. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK1837430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc538d28b2e39bde7b702c1a44f2d7978a54c72fafe7e8b1248dcb04bf4b8d1ed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK1837434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad5912ebbfd058dc689385330556082408b9015c79090cad9dc394ac7c8c63d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEYOK1649426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c4b873d34c9ee977d4675306e961e154f7b36b408a4e2b37268877507e1707. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEYOK1807969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a885a345e0e1434b1d9b559e64bf25b18af078e5e4b405fa7f8593d881c3343. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEYOK1710774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9783383a2f7c2fb2ee3731ac73d71391a8789ebc49a1d470e6d4abee7237978. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEYOK1606560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad5912ebbfd058dc689385330556082408b9015c79090cad9dc394ac7c8c63d. 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/SEYOK1649426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60778335265a6876116aa41b15341042f4b5af0195add5fb25bf8511cabb9aba. 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/SEYOK1649427.