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 0xcf24494861a7191adbc4b033f89ea31aac2fe58cf16edb4dc7a2ec7fdee2b6e0. 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/a0c2236c-3cb4-4a04-b44b-a402b61deccf.json and https://artists.proofprofile.net/proofs/artist/a0c2236c-3cb4-4a04-b44b-a402b61deccf.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 0x29147fffdde16e7974fea4d160b2a293d8a3c3cf03037c0779f2d594361b16d2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA51809233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b076f4b141e0a2791bdbd2095398025a864a09e70b3caa11d16314ce76666d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ31951019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6029c0389244c0d77cf541ddac75b883cecd21f8e900fea5411af4d8552407. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZES51885776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb896bdfd3d82993439c78a64a4f6bf212cb6be29ae3638f92388272013e53c7d. 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/QZFZ22186437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4bd6e1e9ffded02f87fd581202cc4e5ec2c27acc09e1858925620c4d31e0c8. 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/QZHNA2155102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6029c0389244c0d77cf541ddac75b883cecd21f8e900fea5411af4d8552407. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZES51885776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b076f4b141e0a2791bdbd2095398025a864a09e70b3caa11d16314ce76666d1. 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/QZFZ31951019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6f8fb62fc12bd778dc7d5aed5c7ae471eda3f9268b4ab9fae5e5ab2cad97e2. 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/QZWFM2332686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319525e9252f39d38827fa8b8b3fdd4ffb3f148a31783ee48cea51ea92b5355a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6N2458410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ef44555a8fbb2e5f1850aa8d1725d9af9fbe5dbc0179fa2f6307fe7c3c0a2. 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/QZK6N2458411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a5ca34087a05c0e356e9abda6ada7359665ca175eae2d7650833512a2eb22f. 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/QZDA52248520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad266ea3a32a37b63f3aa8af0f650e9005eda7111ca5ad8eb94d8cf4d1f2b7fa. 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/QZDA82471947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf38ac5dc4dce545b7fbb81a74315440e2b4e988f993db919ddc63f6e7bfd77b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6N2458412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f9f7c6c348b18634d479a7db1d15c8e06584e17c56617b83c968713b7ff7db. 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/QZK6N2458413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04040fa1cd345b1570e81627a096dec6666507079867a7e8fa48d015dc0e50d8. 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/QZK6N2458414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57477048df9d3f17b51c24e7d50ea3d930d72b82686f6caa3ac2ac6b36f3210e. 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/QZK6P2462147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb896bdfd3d82993439c78a64a4f6bf212cb6be29ae3638f92388272013e53c7d. 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/QZFZ22186437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbd5a613a42c6138435e62ffdc8d0f95fcbe366aa55009c103bc4a9d90b5321. 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/QZK6N2458415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c719c42c3f056a4482b163c9c0d6195fd8a1984ac2237d6f6a4c9a7e1c1c09. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPLR2066215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d681d807910e0885891309c06defea690ef28cd071aee887b288294a0026f3. 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/QZHNC2088500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c79c7f11824a48cd1c7c4b11bb6cb7cead9ed75372314d8d256fbf5edef0049. 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/QZPLR2066218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3464ba39dc97cb11b42cdf8adce44a55f79ba037fe5f9f9c2120c319389ab8. 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/QZHN42193169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcdf539bb54a8673cd8d3ad274bd1ddc86a59e4ba62e9b4d4beff982b7c03d1. 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/QZHNB2260577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb624babe6ca1dcbafef0351405b91471cf67123db1ff59ed17e1b48c10e57352. 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/QZHN42193469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186e350a5f5bb20d035abb27831244197c9c90f3559b3bc022de2f50ec0d2e23. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN82516620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd984071d44ccccd13437ed4bc4a8680b929948d63d4b70d5e2d7a5a8fae229ec. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN82516619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533ce1706b17797595299e3f3b57e044355f18623bd0950c3d46c17b9c83d999. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZPLS2521697.