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 0xf12ce0040b273c56c9f606302d111752c1c29fcb7ec24aac25b30ef990dd0fbf. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58d4cb7a-af1f-444f-aa88-4de2f3e05805.json and https://artists.proofprofile.net/proofs/artist/58d4cb7a-af1f-444f-aa88-4de2f3e05805.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 0xde90140c5443dda2a19e184f62653a02bd26a13ca34d2ec483773d1e2ebc8f05. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/HKJ342350025.
梁山伯的華爾茲 (劇集《羅密歐與祝英台》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473ac71346e42652d00786ff148dc9aa0a7fe6fc39ab61b01b5641b3a46865da. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HKJ342300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2bcdccba61a6a9bcd5ab19209c7fcf5c66bbacdb61a98d940edbd61cebb2b3. 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/HKJ342450018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c61f2d266503a347f3cb99741de3d1befe10f4e11344725ae2260be8ae3837b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/HKJ342450031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51303b66f523e65851cf9efcb7f5ce2e666e03bc98b31051976e055ec44ce7b2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HKJ342450037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c2c11e5734be952ad1d14ddca77b5ce94ef952af16991a1bbc79b1855674ad. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:39Z), 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/HKJ342550032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f8d494983159d06059f27b8ae71e3a156f89afd165e4ba7a7e39a9708fef19. 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/HKC632408076.