thumb|260px|Bonsai, named "Kenshin Tōge" (). Japanese yew (Taxus cuspidata) presented by Uesugi Kenshin to Nagao Masakage. The tree is estimated to be about 800 years old. thumb|Bonsai at the Omiya Bo
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 0xe2e816a9e00db3acf0705115bb0375bcad51263376730e2e628d63fe0a92e7ea. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24a05a06-0cee-400d-a923-e5764f8693b3.json and https://artists.proofprofile.net/proofs/artist/24a05a06-0cee-400d-a923-e5764f8693b3.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 0xa51ed8bcc5ceb00451bf68a7b8cdcecacdfc921de09bbec5338bf1db92a0eb8a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9K2436371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0653a0c7295029318a8bf51b72f1b3c88fe8463afb9baef3295c2030b11ed4. 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/BXVJK2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bd79c19da80de471f99f71b4209acaf010bcd1145504738e05e56ecc640997. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXY8J2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c695d857e9082d631d2075d44209bfb7dcdc45821cb75591116eb9265d68ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXIKW2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e01b67ef2c4a42313c2a0995bc82334ac5ff08026f345c1189fd1f9cf0b485c. 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/BXY8J2000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309d2dab6497dd356c06ff23d612e4204670caf30247d23d0b08521e4e42285d. 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/QZHZ31941689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798c37aaadd92bd3fe6c64f84c790939287b8865ea63ba509aae79eabc6447a3. 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/QZHNA2185100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d442abe5f0d644b37879ec608a78681ebed26afe6c9968027b7f5431aa37c4c. 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/QZW9L2381112.