thumb|A khantoke A khantoke or khantok (, ; , ; , ; , ) is a pedestal tray used as a small dining table by the Lanna people (of northern Thailand), Laotians, and by people from Isan (northeastern Thai
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 0x7408475007934fee9a3102ba7dbd7dd340244c988735102f25c491149de740f8. Chain 2 (Bitcoin): anchored in block 954010 (2026-06-16T21:41:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3457e5cf-12e8-4b43-bc22-8a049ddf0ad5.json and https://artists.proofprofile.net/proofs/artist/3457e5cf-12e8-4b43-bc22-8a049ddf0ad5.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 0x70746015e88f1ea0df71a65100ee4bdbec9d095d3006db1139f07b7e5f728b01. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:52:55Z), 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/THCJR1300436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9834c7fbba07d802517a0578d774f808445accc67f39259cc98dfe3081d614. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/THCJR1300438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc7a0c5f1eb1bbee761b3e992cc65db096a9720e5f52a6df4a7c2283e32562d. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/THCJR1300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bad9fd02aeec5fcaaafb7529c7c1ca31d6c59985c775ddfd85bb8f284d8bc0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/THCJR1300444.