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 0x72074f6309287d4f35739843e96abf8f5578f5a5536f675927625b72cc52d5e6. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/356ac730-bf9f-4376-91dd-f2728ed27d8c.json and https://artists.proofprofile.net/proofs/artist/356ac730-bf9f-4376-91dd-f2728ed27d8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
VA Innocent Music December Sampler vol.3
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 0xb7c7f1dc32b79418d8f4b3464a9190a9a8199468f276118a30793b12ab6cbaed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US83Z1507717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6027b7e5b1c9e9c5d1b6d1375df7800c621e985fde928130268debb7e209baf4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRP401500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51e9bbc9b6096b74f76c60dbe78f0c35b9856205c212bde469b8e31977e6ef0. 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/FRP401500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0247e64afb55ffd3d2112d09158171c7809bc4cc556d7df64d4d6720c7dde831. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRP401500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a777d472b909f6c1c2d81673b7ffb124ab1abb3f5aa794c9a11b686ecfd5e6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f0b79ae93648a7d52e3182f5e9346abe149eb10007e3aa4678eefcb8c0de2. 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/FRP401500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97153136a3b377bce6ec4d6805144386c7a6c9ba37800019178a89e00acd9e9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRP401500340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422c60205edd28fb2d09664b9ec632445aaee510d73637ddcdaf3d78975c3487. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc039db20046eb09155f9974cead67a48fb08ca76623f9d7c2747e43582b98654. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRP401500350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5a33caf40c160e80ed83962416ccdf9aa6da678cb1309de575fe9eabd5d3a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRP401500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3035861bbb3fa768f4209e79276c8901d8371b0a7ab612b5900de8c39ef5b08. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff03d1181e5ab363a15f1ad5c2098fb461143d55d72dc33299c4e4bc343f27fb. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRP401500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126115164734e8818bdf52cbbead3d726c690a85ba4ae0f345688eb9267a6ff5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f73ab5767057c798cf487ae219ea3769bddd1f2136ae7b0c6e07d83797c83f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1185941485d57205120f98945085bc3dc9c7a92b07f3ba69ea543aa35a576c5b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRP401500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc03dad7c9d91ac24fc9a4a5d4601ccc44e1d7ae2441dddec86f726a10f78c22. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FRP401500250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3e41f25e388cd2cd52e53df2e83b415b232cc9e5d9a689d653aae267aa9b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf559d48f032904aa73fe57d79066759a5598787966a6cd974248393c6aad483b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcd16384e386761eac3867bfdb14249bb8dfcb121272c3ca5c6175500ff3fa8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRP401500400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b59de0a7bffe73093621a77995c45f64cb2a0ecdbfb2c5e97dc97202945f91a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772967c5b9aff396318dd92ef4d9cf4bb428a72ceaa381f4c2677d9cb35bdd1e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FRP401500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7abb326ee7f02f6c4620eee3dfe1b7b291b252c6577e18bcf3b694c3a18b3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRP401500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfd01e7999b8ba201fe8846136df5a727de1510005d5c5e7d684afb35b96a27. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRP401500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0b507770fec935c52df2d1f7e834f222b5c1bd842b54f0c4b39b5aae2c9e31. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRP401500290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de44320f4656c765e1300cef97b8f59e0dfa3f74b7a8569762ffaa7cbb3ddaf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRP401500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b631b9c27bf3aa54abd12b3a760d3ba4a1e82a4c554c264b423e4fadf8658d0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRP401500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6302887895d881b97813d082cfa43a8d5a5a2fd0b250143d52bf55d718bd9759. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRP401500440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d74d997811f8d4f6d01fa3aab4ebfc3684c831ae37fb71bfe20086d672d0eb1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRP401500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede2fa4a64b178021883fd909697bff1ea935c612d4ff0b7ccce57a8d24c290. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRP401500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb160eb89775ec5b34bc78b0c9586dbdf741cdd4cd4668bd5474ad2a9bbeb3. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRP401500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c127cb81ea7b0b8983cd4225fbd6ec57b220a5973bbe63dd75651090180958. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd6b5cfa47a9b381ae3e9edb586e256995665a0b6fa563e4dd2cdbc7f8af7e7. 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/FRP401500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890082094c65f6f0bb1ea61bfca20f9b63a66c00f23086f22e1b4abb19094e14. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USTCG1096561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62036e6ad5c2d1dd7fcda2e3ffe155a9e2bad840569666291aa3287bcf14d84. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USTCG1096563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eb8f33a3a55e4ba85c0e3b993e1d7859f9d93ff84949ae47abecf297e46da3. Chain 2 (Bitcoin): anchored in block 957240 (2026-07-09T00:47:38Z), 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/USTCG1096575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45950a8649aecf0c88392a66704039c7936216ef4cf00d2523f935d3e61029cf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USTCG1098888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213c93eea558f15af28a3555e3c599bcf495ca0a6673621626534a9d985a97e4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CA5KR1903346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934e5a74f36636a7737c0945e32bd5a2a62821d186e1111bdd55c6d97f886357. 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/USDY41832618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec762f70fe9f5a1899119b3d62febf4028d5d7100624edfe5f2cdba1ee49137. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBKQU1588934.