thumb|Kullervo's Curse by the Finnish painter Akseli Gallen-Kallela from 1899. It depicts a scene from the Kalevala in which Kullervo curses beasts from the woods to attack his tormenter, the Maiden o
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 0x3db2520d9a5256426b01c1b092056905798b7680a96f0db6c20d4540337918a1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb499c34-f1af-438b-8184-935594e234d8.json and https://artists.proofprofile.net/proofs/artist/fb499c34-f1af-438b-8184-935594e234d8.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 0x5ecec33b876872c6395165bd4386169b39154728ede219169c52c42dbb95d598. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:19:59Z), 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/QZES82291269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f3b94441fcec04bdc50fa404ff6d0aba2e9e5a6ca7b1136579fbf7a55fc454. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWY2254855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bc31578d8c2567417dc850f2bf9b24636a546f38d96a548d0053d61a347cae. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6Q2387227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad649286e54ed41f427849270292d86b03c4f02785510ade9dbbc2e40c247e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6Q2137424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48204fc801831cad6b20ec12362087a2b9e5ce7bd29ba959acf227d35ca2699. 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/FIWMA2400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad649286e54ed41f427849270292d86b03c4f02785510ade9dbbc2e40c247e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:18Z), 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/QZK6Q2137424.