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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8a999ae62cc802178e4f45549c57f35dc11360774714f11f194769ce66d5bc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e45a22a6-008d-423a-910a-0e3e2dbb4cf0.json and https://artists.proofprofile.net/proofs/artist/e45a22a6-008d-423a-910a-0e3e2dbb4cf0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6def7861d46e14c4ffdebd1d01747048823ccdce6d7557dac78278e0c4f685d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ7R41950225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdb535bea9f9f2c56e7c9509120863c94277b73f570adf683de9f7587502966. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA72128258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb551c45d695443aa994818f0f57811125088613e042962b2822100610dfc5c. 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/QZ7R41952014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8931e775b10f0eecdff4bbab62569d78dcb2e3a208b5123d4f46c9978c1128. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ7R41853255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9698c938426df8a4289f7d2d6f890f31d239d89c0b033893a2819557c99f1b03. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ7R41851616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6952448e3259072218d3fe726a139eec88d3b74a7bb641cd98ab86b2196d5771. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA72066216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca25bb4c2a0550fce9abbdcbb14cd6d7bc43436a351013a0cca545f65c9f2b7. 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/TCAGO2205918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcdf002292f0cb14193a69be85dcdf41683bcb43d8fc771ebb03b5539a18a20. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2385129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebee9ef3441a37db2839d011d508817ebcbdee1813ad78e2c373164d8879f21. 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/TCAGQ2234700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa76d9f80cb4330fd785eaa3aacbfe84f00b76f5d9a408013514d9a6103599f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ7R41952560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1083c20b80f4766fba0f8268cca024374befc76121fd3b33eb611d9ff2767e. 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/QZ7R41952463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6919cc580f549139fa1a8d1e954c07b40955403b05940a01165663846f418ed. 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/TCAGQ2258498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511c412bd8e231b44380ef64063aba56fccb7cb0e8163013508e974238f04e3. 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/TCAGQ2228626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ce43c9a1aed7e03e51714ae7a44fd505ac7d18f10cec7d2f497cac5157478c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ7R41950698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b7404cf2761341fef81cdb16f65c44968e35387c441b51e436c2b58a5e3650. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N22463788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a752b79e32684c46d31c44734c942eef6d127f61c6f9d86529a9a4adf43b74. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2469434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576845704d9e3e7562792750a4f6f1c04137fed3e9a1b53ab99079066fa8c311. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72184882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55325efbddbd8986ed8a26d8cfa4a6b74c1a2fc2452d6d099179c93592b91ce4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:47:36Z), 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/USX9P1402246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c74f6c1670bf52bb6dc5de2e54131dec85e7495be9df83fa118bf8d2c422f06. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMDA62165389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5811023da0217d050e8afc1416a9c19aedab9d3135154a7b82ca0a2b31779eb8. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:39:45Z), 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/QM4TW2118674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc710080aa02a1911a4ddaf8fc77ca7c3ccb0c913993ef4056e9763d456641353. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2100838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d1218264662d1dfa3c5f4d120582c9d3bf6ba83323a6238a5d21c30587c26. 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/QM4TX2106812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a704942cc4d10317674eac84bc8ea505088127547559a9f4c36afe5f5194a35. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92140559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce10c8eb2d750cbd103d3b94d0692af17871fef4fab9a1ee45dbf55ec7db25. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGQ2228399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e5f3cec4c7e56f0ec9ec601fb8389e51919ced58ac03327915b8f872286f62. 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/TCAGQ2234599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0abda08c22cad925f69afc779e327f773165c181f34a364132982f5af4051c5. 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/QZ7R42050352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d3f209218f2352bab5834703fa996c5ec3603fde12d4e72222583ea1b1509f. 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/QZ7R42050112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1867c67fbbf2c6ee19ee5ee616e344e09cdc9a3f1e4e753c6d5355397adfc94b. 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/QZ7R41952108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509081f555d1978ee812f92ad2c40d81afe723f5abbeb0e75378e7e938323163. 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/QZ7R41951778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b2463adb0cab4cf348c8d3bbd52dd0478f11e92ca6bc2b662bba5f50d6a91e. 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/TCADJ1754804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ba80c9cf31d2db1776207d4528c36771ce0417bebaa55e759fa65f8512960. 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/TCADI1711536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eda72f2c2b9426b71be6ed777aa812df9c5899efa6cd1271aac4b8cb09b1fb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ7R41851966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c3a27d144a5b6f87ea65f0f6a812b30ec0ecf786a7ddc3566d34c5baa056b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ7R42050449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6a30bbbbd91d60b51a9b47c896672fd5e19ff0628cda31ab309147e6d2884c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGQ2235085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df2af92d41ece2c2a2a910ef87ceeb8d40bbcb28f46e5412a612cbb50c76996. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:23Z), 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/QZ7R42050659.
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