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 0x94db40ceafea2b4ed258ea0e496f72d470ed1a700ba420f6e53ee5426424d610. 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/80e7db36-643b-443f-ae2b-3211586951b1.json and https://artists.proofprofile.net/proofs/artist/80e7db36-643b-443f-ae2b-3211586951b1.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 0x6dc3203b6ddde7c4dabf4d2f3890b2a8fac26fe8ad4d102811367409adefaef9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR59R2302258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6297e43cd6db491cfa97b6356c39b66f2c524ed4d9de5bba7217be8da98d72. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR59R2327585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41839803fa04605e43dee815f7fd963f7251955f2f31db8b764d26d2898d7156. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR59R2340136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3c6737d0637c13abf1be727cff9e2bbfea313452ac107ec55a81a0c396c251. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR59R2357909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb53c2671f697f948c3f271641bd8665ca6261407b0f647b1f98d76e3e32eefd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR59R2366471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde9323b20a19e28e05173ae0ffcfc7481a96a4a3c9e60beeaaf73eb9ce28024. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR59R2372731.
Khadrai Nonstop Halchal (Hamachali Mujraa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c5d5c27a4e4b51b955631654cdba9b30a696686743cce81a00fc9adb69b526. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR59R2372740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97ae3bdbf2e2405a30d45a89d60e30c2267873c70c8c15ce73a50cdaf7ce276. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DGA0M2321858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eb096ca2d6a2c5b732306d0b72efbe4cb02e8a0f0626c9715d8c65b682fe44. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/FRX452464103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bc967e1c07db5d537df68d653873e521d2a55bc5d07475534281e716a603c1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DGA0M2461473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa35881be5f02f1da5802cc4065dfe36e3adeb4575b60c6849e1d22f7b14989. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/IND732446425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadadb0e21ffc2562a188e5e92c99c2b61d11aad47a1630b2ebee55f523dc5d59. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DGA0T2414661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd528c2c61f8f6d2231825e91413503ca65dfbae68267c953dafe137e99be911d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR10S2569280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c076da380652e995acc00aef44f6a1511e37d79af6fe14107a5a3689890b2e4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX282545274.