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 0x4f82a77413aad3e55b520aab81c42a48bdc8f8f21a87caa3e4cc915cd9e9fbb3. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90b4a030-fa44-40ff-9365-925c926030d0.json and https://artists.proofprofile.net/proofs/artist/90b4a030-fa44-40ff-9365-925c926030d0.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 0x2e75665fba99c195b43e0785edbba1ad89eedbf957476baf104c987fc0a04951. 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/QZGLS2405638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eba090d3ef527b44a24ce08d4b3e82180f2627a230a441c939ca4261abbcb19. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZGLS2455361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eba090d3ef527b44a24ce08d4b3e82180f2627a230a441c939ca4261abbcb19. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:05:02Z), 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/QZGLS2455361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78134a7ebfd72d2300c03f1af59448c5b620697b3035deb7c3bdf3d804bc78c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ8A2411568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e060b8b2f1e5325ccb7129d33c6cf62535569b8d428eba27587d87d28a09a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZW9L2454302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e060b8b2f1e5325ccb7129d33c6cf62535569b8d428eba27587d87d28a09a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZW9L2454302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c29744aa28645f35bfa0ea0a5c092498c449378c388abfc11eaa0b4597d24d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/US7VG2549505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9081172faae5249ca55aa012fe5ced6eb7e235ddc376ea47461447c549bca7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:23Z), 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/QZHN72588946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d7cf8e1eb08b840717932edea3e9a9f06329c315487f4685fcc7f4e0c9657c. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZHN72588948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a99bfd57c6b0de0e0aa00765b0e6f7133ab33a63b2657a8ebb2676e7a6d9c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN72588942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f944feda418eb954bcba2bfb5bac7946d137f19dc7b0cdbb6e0ebfcaef0b0b2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:03Z), 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/QZHN72588950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729635b3bd6d69cb6f4eebe74b3eba4cd7b83e8d070aa75be9e217b3b96ae5b2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN82551272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8857b94e2496dfa66f462fa4bab74b35a5d28f8783558ad0f61529e80771946d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:12Z), 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/QZHN82551265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2484601fc8e063b02185ed3c0a5f77443455ebff4f4ee7c0bf1520834d1d7f35. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLS2590291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2484601fc8e063b02185ed3c0a5f77443455ebff4f4ee7c0bf1520834d1d7f35. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZGLS2590291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d2565b52e005be8a68b513cd154c759c8233e7ad6dd6f11ab6238a62a8243. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:33Z), 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/QZMZ92589962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8119ee24011316a1d054bc38bfba73569dc838bee831466b3f4e57a1d23e59. 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/QZNJV2557687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7984e200190814053d932cbd5275831f03a5ad4bf226885795b1d64f746550d0. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:04:14Z), 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/QZTAY2547746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad4fd0ec8f1ad86a249ba7a3bd179db78f5e73cee67be4fc769a159be65aca8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB22536248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdadd34cd2bfbe84c9d8b6662f1f68704c72fc406412d206a95925a82e34fe6. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZZ7W2575719.