Jin Jin may refer to: Jin Jin (musician), British musician Jinjin (born 1996), South Korean musician See also Jin Jin and the Panda Patrol, 1994 TV series Jin Jing (born 1981), Chinese fencer
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 0x71c342a7d5878e60c8bd8f92deb22017a484adc7fb998bc1363597ce2482205a. 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/2da0e655-d54b-4fc7-9ac0-33af800a4eb1.json and https://artists.proofprofile.net/proofs/artist/2da0e655-d54b-4fc7-9ac0-33af800a4eb1.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 0x03c6e22b0582971ebf838a687fcacf171068bc0a5b2ed96c960beb0f83b4d104. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTRX2237552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2082cb50995517f7c38e3c513ea5ea345ffb948a03956eddf04b401d047bbac. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZWDD2294950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6623a0aefa4af598872c42f2e6dd8782f2f2c8fed83c35de5c675804d0d0e42. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWDE2230637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0815efefc272c07cafec71403fd1ab3d5ff74b2b69de2207fe59d0b6d9c5df4b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:49Z), 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/CAQOI2301376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8687f924ff26fd3c999ad317d2794ed5f0f8796f5e94acb80219ee7b46e9527d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAQOI2303773.