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 0xbbd1e1e59d40b3e55514c9e17d4435b8d21bfa9e2b4a534ba2cf7b0aa434a7df. 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/7ff20d50-3f31-4968-9d86-8ca4a56cc769.json and https://artists.proofprofile.net/proofs/artist/7ff20d50-3f31-4968-9d86-8ca4a56cc769.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 0x28d4b795a8a8b5709457d62c85506420d2fe92be492ffc2f53631aab216e4b23. 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/QT3F42422833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa297001232ba7ccff639138f668a37662431ddd9e0730216a246e873225b788b. 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/QT3F22448591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8842da642eda1509df220dc95dda31c9913b24e83a0964fcd4b4d71f8b3d818. 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/QZFZ22539250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc09a337c6890faee33777b9bef7538a7b1d0e25f917c55e3c11acac36e4336. 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/QZES92537944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb89d5be6ec0172f62fe68fc7e3eeefcc66744187db1d563ea4961bd85a26b3. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZES92540082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a68486701d6269b2e478dec8cfb9868b4d0712f4da841e669b622eb71859df6. 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/QZHN62551447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb89d5be6ec0172f62fe68fc7e3eeefcc66744187db1d563ea4961bd85a26b3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZES92540082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9ef151d638c034031e1ab1df46ab5bf9327d6946d5c2ce74f5c3f7ef8c7f5b. 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/QZHN62551448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f00f377cc942af30f151ba321cad9550fa3b12c928e4cb2bf73e65a1150e169. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZHN62551449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ea3c5ec4a1cce55475c06d92e12c3303b13de80a68d014a80ff8dcdff4b591. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHN62551450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9600f2c57874a860c412076e02db414a24452dca5b63c83f529fe775815ce. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZHN62551451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1b015927ec6953a35d733a3265cbbf1db1d48abb7267d987693972722bb301. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZK6H2580604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb714f11fc11ffa806d21e4547933e0dfc0564409db848cbf77004faf629e98f3. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZES62518811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f5773e5f7e7abcce7785d252c97c6b5c439099bf35c2e7ebe5b055655d0f94. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JP92Q2528338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d3a724cb33b2b7fdc11de9e499339f2d0bbf7183b009cd51b1643b89cc707. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JP92Q2528318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96a291147a7dacc70dcb6059e8235bf0adcab3bd820423ba1dea677f7d8680. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JP92Q2528320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1574771434df73a447f2eaf4d79ec8e8fb3c62ceb45dbb82695c631f7b209d68. 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/JP92Q2528322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de184d5b370d7824b45f0b0afd05bcdb411f0a5109b88b4b415fad03e1b715b. 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/JP92Q2528323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c1ea8a75aecfec2e7960d6cba68d56a7b0eb760a015bd0cf40dd0e26d7af05. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JP92Q2528324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8170d2d5f0fe97694f5d1aa39fd702c8a6e1da9d7ab9fd5d16b6aece03eb6a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JP92Q2528325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ccb294bd8870c78ce264c6695b8aaf5d0a39b59b89a0b4896e107e40121a8e. 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/JP92Q2528326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc9007da24ce630650e00da97e7720340706078e13ca04df4812c22580d8b9d. 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/JP92Q2528327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab43a543e4d06173764e74c5cfdcdc9b3b399f0a4bac3c72e8d1893d5af9186. 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/JP92Q2528328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff8fd44236a9fff4a8b8f41464c995548ac92a6b3077847a088ed5f5d8fbc01. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JP92Q2528329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba407b7b0338fe8b251c852ab5307e6f33ec1ca378d6ffba688513e7d6745997. 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/JP92Q2528330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff54a529f443db4164a54aedee491228753a031b463bc00d3e1b9d533e73662. 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/JP92Q2528331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffaedef449553bb999d54aa7387794437a41f65a27453ea2f727a331740f6b7. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JP92Q2528332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9285bbfb47e55e914575d78b9aeb623c82ccba4ccaeb563fbd1ef96c8e89e2cc. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JP92Q2528333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca202668c09e05471dd1d715ebecbee36d6bc1e4a618d9d51b94937e6265056. 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/JP92Q2528334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10a8973e2575499f3ce81584adb6caf2202fd04073cdf7bb8f7007a5184708f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JP92Q2528335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039de07543d53fdc52c85d1b2e3ad38bcfe21917921aa2d2eab2e9d456f76c1e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JP92Q2528336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad554ac1e0a407d0c9b247c742be9ab62941598c1c649d0ddaa294e1b1fd87a. 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/JP92Q2528337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f5773e5f7e7abcce7785d252c97c6b5c439099bf35c2e7ebe5b055655d0f94. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/JP92Q2528338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d6cb424849038f479c187f402223f95408ef5c2f0c53751a3a9b39956a5006. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JP92Q2528339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1178ae28680f97151ef306721bacb115356d02e29c32dd92157435a2ce4af38. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/JP92Q2528340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6462e14be3a37e6f331cb8779b607df6ca49cdd037f2d7c9e4fccf7266da2a. 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/JP92Q2528341.
The Things That Make This World So Sweet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bbeeb2cbc011686030cc8ff5df3200d1614dd60f98ff505d9ae1f8d5e50408. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JP92Q2528342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef2ebcaf5b7f56bbdbef0d56465e4611a5bc66b97c646959c8d1fc368ab183. 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/JP92Q2528319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdef826ccd611718c3982701f1d0a416b4ceed7ee8d8e40ff0882636a36be92f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7K2595945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfb190358fa395b97c104b2a8b6b4cec112ae0b1a4009a383293ba7807ed26f. 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/JP92Q2531050.