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 0x4b2688a9c344d4abf130f0c5aa5d8cbcc848f381b1ca520d0b946fe8c596b313. 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/d3091d92-81d4-498f-9270-33370f3256e3.json and https://artists.proofprofile.net/proofs/artist/d3091d92-81d4-498f-9270-33370f3256e3.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 0xf0701ab07312b5256452a67ac7d2af4d9e75cf5a2c5fe55b2d05a17f245cbdb9. 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/CNZ682300116.
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 0xde523811f3914c7ed3c4213a8519d9389f285268f28881d2b0faa3ee863223b5. 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/CNZ682300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45c6c194c8b60021e846d0679e61bea5e2aa58a2aadb69fb8b899ed33bbbc78. 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/CNZ681900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d36eeeb6c9d1475fdfbb1bc1aa904af972772309fe7e4b6bf870174d042f407. 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/CNZ681900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8128e9f0b3ec31218170dc0d793d96045cf6402f38e7a425015213a002c70da5. 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/QZQAY2335724.
友情岁月 (电影《前任4：英年早婚》主题曲)
友情岁月 - 电影《前任4：英年早婚》主题曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed76b70f969f96640e293cb5fe1bb0922adea50b3f67c379c8a0b63b2343d9b. 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/DGA0M2326573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadf2459e7cca92bb389b24f0404ba9987786668d09396eb48920e7627ba815a. 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/CNZ682200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11506d63e50da09a4cf2f283872b8dedbabfa255d5f4ac66318c4abe1ffe590. 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/CNZ682000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b95681baba8dbf6332a7c63799045f4062dedd258bcc190a9f132ac83c2b20. 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/CNZ682000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c40e6abcb4deb16a44ace586a9c3fd975e059d265e9f0c2c26d9123747e065. 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/CNZ681900030.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0b6a61c25143a40e729813a1c917eaa965fadfa1a0d4dbab9d62b01c52322. 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/TWCC31800462.
說散就散（電影《前任3：再見前任》主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4c8049ef015e5fb65af44acbdb11c2ee590601f8a7ad386c9fe07b16fb2158. 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/TWCT51718531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6058bd5f00cf8625dd4d67d608e01c94a33d0d7559f538526c68028a050cb3ba. 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/HKE022234798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e9b434efd2ab10437a5444ae5724a14de12e94784c3cf78b9e249a2f88b362. 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/CNZ682100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098ba9b5db791aaa89f84606a261a3bd4af944750f1a973dc44ae2454bdc7fcc. 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/CNZ852203921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684bce417e5037fd46e69de22d336c792e40e01f02c6a410bd6b25fa53b9f6f3. 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/CNZ852309232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9350be26c78a1319977abb263ef37c4a1b6bcb8082f6426769c4c200a67bc8. 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/CNZ852310273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90301fe782b0a6bab724298abb92cab040089df6485cb81259f6e5fa0bfde6e7. 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/TWDL72106998.