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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 0xd17166a0d7971b25718e72dc2cca29c3a10db41ff3cdb7b0058dc7a05c80b3f8. 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/afd50591-36f5-4d83-a582-ead95ddb958e.json and https://artists.proofprofile.net/proofs/artist/afd50591-36f5-4d83-a582-ead95ddb958e.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 0xa7de143749a7d7a412a0b29b2b9c7d8596a188fbc9dde30448e55966e3c666e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BELU92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054fa33a73b52f131dd4f7f90cbfce51d511a0312d1158a9cf63115d9042a134. 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/TCAIX2489618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3298f4f5706cd4433471f72254757fe0797ce7420c3871130769fd5cfa3220c5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIX2489832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecdc027612ba2a0526ffcabf3379ba722435625bd7ce3210ee0e141fd7f8541. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/TCAIX2489882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8297763ddf10b3a859b8d5a2a441a2a1dee6528af2981ce589de653a3a92b8c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAIX2489910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca704cdd0946bf9e0282c8bd1a3627f41fc994848665f49ea01cc1c78974a4b2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAIY2418445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6213baf8414ec59fffd0aeb78cf7e8293132156e4636da9513019d643ab3d083. 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/TCAIY2418451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35c5ab6b4e46e723c18e2117c541041bb2be745497e24b3f201eeefefe94741. 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/TCAIY2418455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca49e94277642718db68d041e06a986c1037b254222e8005cfdb038c0840bdb8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIZ2418456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416388c08b13fbfe10ed47cf8979d9917b5340ceb7b3ac4527ed1d1b1c86484d. 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/TCAIY2418462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22ab090cd981e5404c99d8a90d578abaa9df49872c3062a8d46a365bfa4a150. 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/TCAIY2418466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a235971ed02e0d31f47ee0972a8607e6c38008248e7453719551600fda8d578. 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/TCAIY2417774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412c64efcb8eaf86f2a3b19246d8346831c1602ec79d676d23d5344fcdb8ff7f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIY2417781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e6f7a5bc0005652bc33c9db17da29fd8c87c2242f0d49f5b2c7daaf1863a40. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAIY2417784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd836fbc72e7ae5eb7a0fdecde24f3f23f62dc30d5444f89d2da11c5ebf759a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAIY2417787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5b6935c07bfdd01f2c111f7c0dc43f77383caf31b1d8495d7a8a791c23023a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAIY2417789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5acc561da4c05d415c2364d228001c4917e157247b7dc752b1ee1081f655fb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIZ2417790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9278aba391ebeb16d59e7180e50c1a693926f2cf0557099d1f089f2c763bf82d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIY2418558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c8471fd0012fc3bce49ce29b21303bfadb14207a4dd448c1f36141f099ba33. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCAIY2418575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71078cd7a9dce706eb162f38b130ed9a408138540849191b177bbe0ab444d0b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAIY2418299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3515e1c865ca72ba6b1494634a15fca57ed43d418c8375103c720c0d8b1824b6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAIY2418307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd98bcb237f92c587a50564c9a5deceeb6eb7d0d1046380bd8d63bb7ac8ee7c0. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIY2418309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1336a8c03319ae9890848292b40eaca5dc5938bbc93795c0fc925884db4f292d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCAIY2418322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf3b9f426bc106cc34ce965646bdb27e6bee59a814a951d5b58c6169ecc4e23. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIY2418325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5278eb5a30d9d1e4590eaadf41524b0ef74c57e3843e5f7f4351949885a8072. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIY2418333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9586d80a679094a1686cb8de702c52c2cdf9d18603d621990f902f0f4f17815a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCAIY2418337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4290fac4da251ed621bb4476b0447278df275338ab74de9dc1451e93cf1a18d4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCAIY2417947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedaf2608a4d2ec88f2f5d997b9a896b106359ba4e7372037dae5ab753cab330e. 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/TCAIY2417959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f017a0a506398064173de14c92b9d4fb3e02db5278bbe78c9d1e888dfaeada. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAIY2417964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5969c6bddbb8cd0269f8e6c4b60bbb4d6748a7932614f5f72d752886867c0e67. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAIY2417972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fd668e4d1b4ddeeb728804a9f6ca03b7a53ee4d8c8802e004cef18149911c7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIY2417979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01a918268f36d98187d33c205c634fae8b14ed5be44674a29d005be5efd1698. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/TCAIY2417982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc1a6e6c0acff762acb8b9c99a1398a487a74950dbdacc9cc80b8d2a99caa50. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIY2417988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12a3b84c0e0343c951e26c95d4aea80507d1bde0f157d6baa35510ecd575dc4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIY2418763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa792bd3c6b6de23bcabdbf5675cd045c001ff3edd23929d4c4b192935136d17e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAIY2418588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342daccd3235c17636bc1e84add2aeec808522a7ffff69daf5e1d8410ed75348. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAJA2441951.