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 0xca01d0529c0f8ac0bd0f937a4954240420c4d8bac11f68f657ceb2b032429d78. 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/4d4ad6ec-7c8e-45fa-ad6f-edcb537810ca.json and https://artists.proofprofile.net/proofs/artist/4d4ad6ec-7c8e-45fa-ad6f-edcb537810ca.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 0x1fccd4892001d3ce6f9dfcc4273c696ae5d4becec175897cab0f80f56b4c205b. 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/TWDL72108118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb65c8441adddc21946fab8258308350698b4befc1925610084635540b4106ec. 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/TWDL72108119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d05328be19065b8126b88e15e93046d90dab5ef213d5f037aaaa15d504095d8. 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/TWDL72108120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7612ccbce0dff35414d8d0e32ff8a3938c0e129285513881e915e0400b241ee5. 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/TWDL72108121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce11892b1e9eca375a01b59b8ab96e07f4a47018530fe53be6224b10a55319f. 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/TWDL72108124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210c450458bfa2ae5a3adb389d20808169c901fc1659a9974dfd441dba4bf403. 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/TWDL72108125.
你知道我的名字（全明星街球派对郭艾伦球星曲）
倒數說愛你 (電影《倒數說愛你》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08964ca3c90cde9cdf231d8677f2dfcfd793a6def5156dbf8e7b543803aa04c9. 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/HKE672300474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d4aacfd41adf76f08a103a7dad86262e390e2e9f8a56d4b4743520a834fa2c. 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/CNZ632201670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9c8e5c4815e7dd455ad9f232f88ed7ce6f959cafaed7bb529da26ed4d5a014. 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/FR96X2207674.
想要陪在你身边（电影《以年为单位的恋爱》插曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd028f0b198c0469c1a460a73c6c7ddcba1d5072c712ddd3af9468839d93eb6. 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/TWDL72010966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bc420a12829e8b2721a8e939a42e1d20a043f9879ad1f9ef64fbb59d7f2e11. 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/QM6P42469128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd20d54fded1ae330dae32477f0e22a924be8906b2c21d6bfd5b86aac51b62d7. 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/CNZ852305636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fbbadd6b80e76c0d8a7a85963497573df2f42b3d675f03bfd1607455c2840. 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/CNZ682300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7692aa71203d3d36164e2706dca3f7d1a0c4d8d9f0672480c659c5736fbecc1. 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/TWCC31801696.