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 0x9c059f417b0b3fcc4d1e74a4c59238849c878bce94ac1158f7c98c69dec99e21. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22a4f98a-107a-4ccf-a165-93413e85ed3b.json and https://artists.proofprofile.net/proofs/artist/22a4f98a-107a-4ccf-a165-93413e85ed3b.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 0x67bb27195c981575c973b527b7ae5a60f241ab566b4032daa0c54f32017d465f. 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/TWD951250101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e817b35336da22c8ee863c3eb89bee487bdd7f73a3af4b4b634dd91fba3fa. 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/TWD951250102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01168c53ae96153f811b4fd65b4c76fa315872b6950415a00d17e7c02c86182e. 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/TWD951250106.
捨近求遠-電視劇《因為我喜歡你》片尾曲
捨近求遠 - 電視劇《因為我喜歡你》片尾曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487a19491e72ea8d79613e29db6d18c20fdb59b0106f47ca8f68acd2f127c95a. 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/TWA212058901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c203a0bddea49ca403aeaef7866ebbd9c99889f89a309585448db949970d67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWA531398901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df802cae7e1d9a62e8f2b35a897f7a5a0f8415a802ae14d1ae3a5caf33bd488. 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/TWA531398902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9765ed65ef1f617456c4464192fcde74fe82b7cc0bf18fb4d7e4cd430ae2b8. 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/TWA531398903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2693211ad17d92e9f6c06884ff2b808f9f16d30601cf939eb30aeae961715f2c. 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/TWA531398906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f59c55b3e583e315618a313115ef0603ef261e76331201c800e066d6f35867. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWA531398908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e279666c320c68873b2bac4cdcabaf24fc633191f599ab657a6b7e57ac9c7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWA531398909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1c25dc2ab6c0c49be06a0723fc36d933d575c7c56d2fc66af8df7cb1d90454. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWA531398910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29676131d4ffa1cc909b692237cbc70d01ae16368cafd63ade661ecbcb0934ac. 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/TWA531398911.