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 0x1090f8f45b0f97d92c2ea9f5cc88709424df0689d881f08f9968521e49cc5706. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2869ad7e-311a-4dce-afd2-6b2a2e03e427.json and https://artists.proofprofile.net/proofs/artist/2869ad7e-311a-4dce-afd2-6b2a2e03e427.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 0x7f0bca74bca2a2ed3d991bd1db1081c4100f8dfa3e6c0ed9b2a86bd400da5af9. 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/TWD252300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2375bdbd06e9d13cf02a9253fdf76de16e180aeb556b89af5691f70764f296cc. 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/TWD252300708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9951b41a157ae325902ecb882528dede7948e0ce1a606b1c97ab7e7e4525deaa. 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/TWD252300701.
長歌行（影視劇《皇妃為何那樣》主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce58afef547c406f3c1123d888fbe079a515292f45423dd92b46e730af3e1bd. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TWCT52326357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5a870e245c52af46b8505c1e3273787668a718072dbdd11596626330c5794f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TWCT52326358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411b685a026a62a014087a268887d7e917fd7283a991fac9d25fc6dff8f5320e. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/TWCT52326359.
鏡中窺我（網劇《對我而言危險的他》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70de088bc69767bf35c4a7d1ee964e0d174d0d321275e2dfbbdc6be30eb9af53. 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/TWCT52321022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9b3598baac03ca30847b02143d33c9e025dc08828496c6f434051c1b64f57e. 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/TWCT52321023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2a41b1c8c2c046e9dee5e2bcd10699558fa55a9a38f38978666395626a6eb7. 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/TWCT52321024.
黑曜（網劇《對我而言危險的他》插曲） - 和聲伴奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387918fd821fad1903672d0cce034d968e8dcd17577abcdda8eea44e6ef3fb42. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TWCT52321026.
黑曜（網劇《對我而言危險的他》插曲） - 伴奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47a4bbbedce0b9478730def144a11c493cf52145a7aafe891f2edf655c8e0f2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWCT52321029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7432a1d73632bc0438687601cce634ca4311bced4a8f0309582566ef95f309e0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWCT52321223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241443019a99de8d91bdaef388349816453e7e8ea16fdac756cc29f26395fa16. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWCT52321224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa195ddebfefb0aef7ff0db36851db48fe8c1f50d86136a5c3fe3f46a981a0be0. 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/HKG731697755.
來不及說再見（影視劇《突然降臨的楚先生》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e807bc035021893f60f86c79e39f04373c2549719aae16224e949aa254b2001. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TWCT52331330.
來不及說再見（影視劇《突然降臨的楚先生》插曲） - 和聲伴奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22513be5b805ebf7c8eb891e46d2485ad9bfdf23d763d76a53699898591e7932. 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/TWCT52331333.
來不及說再見（影視劇《突然降臨的楚先生》插曲） - 伴奏
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77889b1120c1079a5b73c53e0acb1c1ab8a87756883af74548923df75d1e01db. 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/TWCT52331335.