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 0x62e205a3340dd0b66a5c6718f0193a294ed54c4ddb9ebc0b2630702b1f90763b. 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/f5298b26-84b2-41be-b617-914f2a3d6112.json and https://artists.proofprofile.net/proofs/artist/f5298b26-84b2-41be-b617-914f2a3d6112.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 0x1bcc5a2485b45bb45c8c60603a59204a703d7aad2ae94ee467c7d45fe8b0a53f. 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/DGA0Q2303148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec26702746c4284505eb34de089e02b26d25cc385f2d6538521288c8f9b20ec. 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/HKG732487326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2772f533a8f4cf4606c397b815cd3f1aa4cc81ecd8d95ede2b324fe6885f72. 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/DGA0R2324119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e1d8a128bd1834085431f1d1b182ee17a032b87a984799df077b63b3e3c97f. 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/QZZ972333887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3292ee3ef1cd51379dab3557085e46cca68e7f0057b63a650c0e0681b4c7a5b8. 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/DGA0M2317546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7e0fb833741a5b9762b795d33eb4b52245963c6c51b61e26af7f025bb5d1e4. 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/HKG732348366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412f809e2482edac9c75cfd3a2cee2b805da5c279b0268bef6fc7aed557ce058. 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/CNZ842300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d980a0deeee1e2c5251019d5fec66dd88bb22f979a63c94e32f2a867dda4b4. 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/HKG731608127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf954aaa67588fa7e789d1738666dba0034a5e0772f1afe55c4755e0474bd3e1d. 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/TWV812186701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa122e1ee47ac48bb65820ba4d0d18cb9faaf50631f587532a18d9c12c66bf397. 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/FR96X2120176.
歲月無聲是誰的流年 (影視劇《月歌行》插曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ba7a1038665ea065c3133208bead76f668b6df030967e3539411810e8e7d2d. 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/CNZ842200326.
《一念關山》影視原聲音樂 (關大洲作品)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcc5a2485b45bb45c8c60603a59204a703d7aad2ae94ee467c7d45fe8b0a53f. 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/DGA0Q2303148.
還未曾 伴奏 - 《一念關山》影視劇傷情曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da4b7dda257c1d0f224e91ebe9b2ba9121bea668a3df9a8525b7e1ee31874d7. 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/DGA0Q2351520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1944da732349995b288d9201ec9654281065ea4b1c2a77292f6a109938945a03. 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/HKG731619980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a951a9a8492369c536fcbb81a5f12118eadb8d0102de56cd8d4129289297e. 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/HKG731741197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5004d0125a7174743a51ebc05c7e13e629af85b931da6e02d6c86148ab03d7. 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/TWC612050603.