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 0xec5cc81639382dd158f0de2eb9d78124cc017e1e950b0d06e1c090c554cca36c. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa1e1dd2-95f2-43a3-9076-c42ec06632ca.json and https://artists.proofprofile.net/proofs/artist/fa1e1dd2-95f2-43a3-9076-c42ec06632ca.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 0x0f5a6c3514be057ae8e93ecf4a4d1b94a6573082fdf125e9c69cb8ba3ddd7836. 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/TWCC31800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263fe9ae6d301c323572df1032198a12579d0be8b07e6cea7ca51175e501ff90. 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/TWCC32307616.
老派約會之必要-電視影集《雙城故事》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb419dcc6ed479df70520167c0884f10310814b07f67432f15d328d7e07361adb. 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/TWCC31802202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723d1562c4771c8248d0b378e86ae58a3c7262593d85cc2c9f6fbb0311563404. 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/TWCC31700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd720e9229bcd9aafc17acdad9f9742847ceed0b1bb3b83a49a878f8e19f7cf. 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/TWA451800601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4609fdd1189eb802972f777c0c5686bccd8aa437faa8c02a98895537d2ad82. 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/TWA451800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075e35e7621deeff9a9b1857de68cbe90a9a960f555d64d0cb8466ff5699c797. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWA451800602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbc582d24ba41149faefdeee41cc43057861e8befcd6078a3cc7f750704916. 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/TWA451800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2cc05e0dd0daf0b2231decc821df038ee460423e6160b2c6dca24545311ad0. 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/TWA451800603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2553194a62f9e841c42e9eb65c094a342e96f11f4344a9ea6237002a43d08c66. 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/TWA451800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb817dddacbd0441757b52d75a9cc0221ba04ac8b37243c93f05ae5f4d397b918. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TWA451800604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90b4273b40cfaad9756e5a238027ac6671f2333ee372e99fd9816873854c2c1. 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/TWA451800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c2e9b41822075908e46c7abe5332db95630d906639cb08e9d17cc0ff2bf37. 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/TWA451800605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0b64cdf97b45dfc9f59cfc3f7e26582d91882d5e159a4c55dd531d824a29b3. 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/TWA451800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0edcb15be91b1fca10135117ed70c095ede7ca3a78b9356ca9df0992b2443d8. 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/TWA451800606.
你這個小東西 - 電視影集《雙城故事》插曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d306b567ea5f10fb96257f349b5c490778117b4c3722d753abd9d32dbeb415f. 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/TWCC31803148.