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 0xa2072d5b4c8e0b47f35cf79740be6d4bf8d851b2a8b112e5d5dcb81f7c5f0009. 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/dae3c6c2-369b-459a-aab5-ae143477d234.json and https://artists.proofprofile.net/proofs/artist/dae3c6c2-369b-459a-aab5-ae143477d234.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 0x56237e00d56c74e670fe88c57e9c1d209448b9e4dfb4664a5dd5df220eb20294. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG731764061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68af4f3a11dc8cc675d72fd4f31168c679e9323686ed602f3194140a63d545f1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKG732117866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0283db13501492c38daa220e893167142a8f9ad430c6ac1039d7e9ca1d9eb71. 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/TWU712002392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf91813fb459e855b1fc02f2701c0043a4b61e0699bd1f58b7773268576445a. 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/DGA0M2420836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff08b16b5afbb3aaa390617d660ed762619a03ab0bbb8afcc867edd184311552. 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/FRX872140578.
陪你到这里 - 《镇魂街》第三季动画插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9554052ba35dcfc15d9cfa2f63ab5cbc71eef82e0236e0be7963bfee40425b. 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/DGA0H2383721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf422445d27106b730644b8c8ca5c685c5fc61ff6b361263faca7464ac55b2545. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG732280196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89faa5ff322ae0f1a2493d41efe947a801323716956825e10f920567eee61e9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732280202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ba3b136a99cf52fdfe6a67ebd42b25da011c2be44e182945f39d7ace825c5e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG732280168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91527beb6e42960da557c9b1b405c771939d7746d1fe7947a8ebfc14af8b2813. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732280218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223d3288552b94599d4bcd7a538ed1e27758533f6b8a356dabb1d7622e27252c. 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/DGA062011438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d98a544d12e6b08aef7270e45055002823badb78b4a5d4c104e4b92b4fa459. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA062011439.
春风欲渡 - 《少年白马醉春风》动画片尾曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d0acc36bcc6af16ecbe563890cf853cd3a4822b8e9e4382eb5351b0ebd74cc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX452202441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332584f539e648d01bec127ef44159144250c333558a78010cf4a2959a3b8982. 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/HKG732280236.