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 0x05f88a2bbec9a562f9d0c893bebf4e17c76598a62ae526956132a41f55933dfd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b050c2e5-31b0-487d-ab41-fbc317e5063f.json and https://artists.proofprofile.net/proofs/artist/b050c2e5-31b0-487d-ab41-fbc317e5063f.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 0x0c7195917e0a07d141b8e5a75dc5cc7a275fe342ef07b0d415736b4fb6ef6959. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:42Z), 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/DER412100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7028b2486d6cd2817e8f4631949fb89c61f8de07dea4df21cf560c2207ff15b1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DER412100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229dfa7a5c1fc3083087c41878590ec71c5c24543235ff04d1914b4bba9bac52. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:06:41Z), 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/DER412100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0342075fa4811a7390f046f273da5a2126129f5518e50012bbf031c633d2157c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:12Z), 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/DER412100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2224317e114fc2c85ad58070714f6af05a5daf37aa01fe944e3968c30df80a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:35Z), 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/DER412100075.