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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 0xfe5a3e1cb134d753fb129f90ca5e24d5f02324dbbe957374c2b4f3eb3cb009ef. 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/9f422ec3-223d-4511-9ba4-f780d5a9155b.json and https://artists.proofprofile.net/proofs/artist/9f422ec3-223d-4511-9ba4-f780d5a9155b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xd6139399b83c109b28cbacdf5721830ef66048d200f61d0974bc7801f43e8e8f. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZK6P1963920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c8a838925d820a740f8fd1f747f9fbf1ecc1af4e0de7e593ccca42579a653b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZK6P1963922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaba4c761dbb5e1a5d92b4a52366164a9f39d701bfb13bc73b0f76e1af3a4038. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6P1963923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef3e80a875789619624281d5371d97f407b67a43034a759904110fbc0f12cfa. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6P1963924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ce4ddf64403aae1e70987affa851a53d9f3a5bf0592dd1d82bde6a72df9cc2. 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/QZK6P1963926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c71d653d06ff040e7def9e37adc7f9172b6f7d02f759fc0ceaf5317479010b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFYY2027117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d10bd8eb5709408e300a6260475f19ec572ba5d05eeb309ee833869d667f841. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFZ32203574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fca24b32852af8abb1e34b6c12adb62041cad43559da73e6a940e547b79155. 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/ATDY92200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65db08a665df71bcd7292774a84480613f9458122e35e5f742d2f3f6feec7d54. 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/ATDY92200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65db08a665df71bcd7292774a84480613f9458122e35e5f742d2f3f6feec7d54. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ATDY92200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d75d6e8278f7f0d877de3b95acb0c3125ea52fa07ff33a5b0569f563c737d4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATDY92200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d61a61beb159de6c9e346e6a2bd17b4b7b29d5ee6fc3fd3b110e5a9278c5bb3. 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/ATDY92200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0e6d3e3d81c5277e8e2591fae8b147df77fd1d51f23fb2bf7e763faa2afd1d. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/ATDY92200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe611a938c1c197231fe294ee6198f3dab2eb3983443315509eaf796caba74529. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ATDY92300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f656a189da9cb1109cd19f9888c79f3c16399e50e8b6c5b88781cdda15d2d4. 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/ATDY92300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1819454246ffe2e59a639e855175ce2b957c71d5a522725b77caa94437f9ba. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATDY92300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec81feeefc74449b8ab88954cf6d030e3e68019ba0c4ff995ef34b584451160a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ATDY92300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a8f58050f4e831f570236d750b7b3d64c44865bda3f786773af5030956123c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ATDY92300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b929da519dc83b0741d081f02f238fd89dda48c9404a97385d945dbf58b9849. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATDY92400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032640b5cfc43f9e3d3359324a98596161878cac29dc5651b32b894af4851344. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/ATDY92400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3472ee1822fcc2ef1a322a97d1db1216e3e53479ec57ac209365067a5f137b. 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/ATDY92500016.