Yunan may refer to: China Either of two distinct county-level divisions in Yunfu, Guangdong, China: Yunan County (郁南县) Yun'an District (云安区) Yu Nan (; born 1978), Chinese actress Greece Yuna
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 0x25c0d33d8bac1e26bb80afb69db50c689c43f51802e7ac06e77fae57512d0f69. 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/2df81373-2bdf-4c6a-957e-ec8ccc565240.json and https://artists.proofprofile.net/proofs/artist/2df81373-2bdf-4c6a-957e-ec8ccc565240.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 0x44d891a41f6ce351d17a63243f2c0b42bff6b42e02403ad2778a548fdb39da10. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INS172002811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd864558b3dd4fe3ec50c54a98f6c6ed254458b617cd2fe787b2e4070511c3e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/INK491900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c0dc795e58d937b64e393bb1c45571a1999784219417ce7d1cf95e48ecf4dc. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/INK492000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593aabc0cdc5502672233512ed5e4b62495bb6ef45ee3cd8d02f9b6ef0b943f4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:40:35Z), 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/INK492200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0517e1bf55d49722838be6ec0f29967dea0b64edb1ada015fd7c06b71179bcc6. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/INK492200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae75e9b55ec5fc3c357bd4de7ecc11c36629d7ad8f9fb4f246d02632104b3d9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/INK492300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7b509e0577299f38668965fac9e2d262d4b778b54c8629a1f5ddcdfe9d7dc4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/INK492300281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4b16d7f3c7cc5c0b68d7b147be2c13712dfa67367a45572f0f91840f150d67. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/INN2I2409872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f06b6d5a139eea98a2dbaa954cb6bb308bb08f6edfc1818d39d4e4ca4be0a5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INN2I2410566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f06b6d5a139eea98a2dbaa954cb6bb308bb08f6edfc1818d39d4e4ca4be0a5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INN2I2410566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04153f465b90f9ffa61a538ba90bf0acc263dcbc58a6c2f97454fee36ad7163. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/INN2I2408812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dd380e93642d9eca1c0c657265b2bc337f0223b2a42de28ccba9d8f7c729a9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/INN2I2510487.