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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1468d13136463af88f40e09b153a019216d69d070f85bf94016f6c6a5777b56. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8efe27fc-7d08-4f90-a68d-da904fda1a09.json and https://artists.proofprofile.net/proofs/artist/8efe27fc-7d08-4f90-a68d-da904fda1a09.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517cc95a5bf01e7f6e01b956ba5ceba0c3a48b29a4b6e98fd2b90889ea55c4a2. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/TWJA32200001.
Pierrot 我的憂傷來自於別人總希望我假裝不是我
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b45eb051a463330e6dd3d281badae0ab1093d7a4ac73cef241bf22f63901ee6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWJA32200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283bf4d922776e66d010327abda4784e22e73d63f90ea713510cef14037f5993. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TWJA32200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac39f0e5aa70176872f91eafc7d55003d1b4178e0ea677357e21c4bcaf9e270. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TWJA32200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc6f6ee539d82e825b597cb2c32b71ab65427bdcc5f6c8e189a07added3a4c9. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/TWJA32200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473fccb52207b796d2c9e3d2a72d70bcdca31675fe035d0f709cee377504d603. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/TWJA32200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eb9681fdbca0d84484624e4ea6ee1cee4bfe98554414e5b0d2a581a185a81d. 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/TWJA32200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fde41cb19cb36bb06d4e9bb7d013c80088b5d0cce3beae394190a3a4e93fa7c. 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/TWJA32200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b45eb051a463330e6dd3d281badae0ab1093d7a4ac73cef241bf22f63901ee6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TWJA32200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe82752daf535b9964128648794ad391a60a93ef9dcaa7718e0c9350a1adc676. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/HKUM71600615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74a345f292c71a2747c5698b88f2af2dbf476a5d2b1246e75b5a225753bc0c1. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKUM71600935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199d3632ea868ba9a746add8c84462f9380eb512bf57ec2ba5c9311ca0237bbf. 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/HKUM71700609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55188d99986b4563c92a2518f54ff161df58bcb046d166eb5deeda7f43963f1. 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/HKUM71800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa51893c9236470a421a0ec3e4eefb97126dad9508bc33f3a38d87ceb83cd034. 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/HKUM71900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67caee780ec77d7e2d64acd5abe69dd17df87c4f9af7c6099bc39802b0a3494b. 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/HKUM71900003.