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 0xc23e3920a18213c824bc87021da14fbba016685f10800785f089840c8f40c821. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae95615f-188f-4faa-9cc0-fbcdb787e2bb.json and https://artists.proofprofile.net/proofs/artist/ae95615f-188f-4faa-9cc0-fbcdb787e2bb.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 0x14a3aa1bc7539e3dbbe094d8db1910484b7f3efd7257b5b6e5de91be5575e8bb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TWCG52099715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d77793cf03f3409a83b4465df86572c928533bf686a9696308fed8ed9df3cb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TWCG52099716.
輝夜思追 (手遊《陰陽師: SP階式神因幡輝夜姬》中文主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a443d4e5dcad97693a7cce6da7e56e504e87c4f2601465d5550cf149b2c5c24. 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/TWCG52178894.
月圓依舊 (手遊《陰陽師: SP階式神因幡輝夜姬》日文主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6c49e8850bf1bcdb5783a152f59942580c445471ab2721e494055b7a5ffa35. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TWCG52178892.
永不褪色的回憶 (動畫《陰陽師平安物語》第3季主題曲)
不見 (両想い) [手遊《陰陽師: SSR階式神夢不見岳》角色主題曲]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9b3c056bdcf4e8ec47b13608d9eab17376e2e738d30e7e7cf935f6610e63e7. 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/TWCG52299968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f5bcb159158ff0641d10160d56aaecb9fca698fbc163fef0616235fcad0e54. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TWCG52299970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae16f17876dc94d430c76989983a7019049e672cf69cf7de2f17093a9c01108. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TWCG52299971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886dc44cf310e9f2bf268356910b212b03aecec6d1b6276a2d72cb641b842b29. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TWCG52299972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9565fe93201478c349bc8b3455ab996707bd0dd21549dd20bf7b2276614baa. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TWCG52299974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaeda917e40fb9b1a0805dfd1d1b1a2b26d75efaa270a191ea251a1c4674074. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TWCG52178882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c94144dce3dc617737a5fff994a76d553789f13835bf6e9a68d20a46fd042a. 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/TWCG52178883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fdb2d7a61b9db2b551ea80a5bfb3590cc258e7204e15082b398a3b86b896b8. 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/TWCG52178884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc4d6abe2ef6b27026a07b2915bd1dd7673f1a28c1e7b320c2f745b86520cfc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TWCG52178885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec8062cf241e39e060083fff5b0d940bdf49a28e51bc87307fc80bef571d10. 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/TWCG52178886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d04f18c5268e69a8946633a07d32781f49447cefe38d2ffc591029b119792b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/TWCG52178887.