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 0xa2664eb5e7ba94ad3a6c208dd08b8ecbace6c20d49201806742d3ecfc4ba4f07. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/119787af-5c7b-4a26-b1c2-9f572fece272.json and https://artists.proofprofile.net/proofs/artist/119787af-5c7b-4a26-b1c2-9f572fece272.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 0x586cd29c5f69e586019eda48dd4ef2bedff04c8fef2e19956c0a24875a7bcb9e. 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/QZFZ62173066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20004e3418db17c851a68863bc23e08af7556b0c4bb982b4c30b0326e12978b5. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZFZ62173067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d924f366cc268df3317713e6ea1b1cd7c986d49f562d1754e0432ec41c683f. 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/QZFZ62173068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbeccdb915acf1e9cd7b21996a7512e6ed1f53eb3e260949241de2e6e235c3a8. 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/QZFZ62173069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908c48a0bdc666c39dede484a0502fec5b322735b53d39710268c9bfa6857493. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFZ62173071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1b976793b91e022be8092ea596eb48795daa7c5f6ee8e066e0b19af27da1ec. 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/QZFZ62173076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d44014a104350835d02e16a1b851718fa3e81241244d83db09ebf41b5011dba. 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/QZFZ62173077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f8335132d1c4b3b24876343e82de4435d160e1b6c280de30f69e8110d1b069. 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/QZFYZ2557442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4759a7f0715707a63f2b55bb795b62b99b46ba0eafecb36661b0276979e805. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZFYZ2557443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9bb6d3a1ea3f9e2fe42c9c527f7a312ed2c3cf620c148457d47f8d722a5e4c. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZFYZ2557444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6989cc6a86d57cbfdf6c1f0c054e78c0d82203efbbc31630cd9087fc2e9d441. 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/QZFYZ2557445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd030368669bfba591f92a9d894959147815728c341cc8978aa64a135f956253a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYZ2557446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd212155f716548c819f36bff9d7f085e5d42d0aae1a41473767f020b9f64d8e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYZ2557447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2eb205446f0a48b3d36b6ec29e7c7a0f28815c48c50f6e7fa542505245bb30. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFYZ2557448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4285f9b1c0840ef8a0263b4fa91cf77c738912fb2018ba36b9302eb6fa4e572. 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/QZFYZ2557449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df29bb15eef5266095ceaeb26e905309f5cc60ab08fb21f63af9f034fae3ad5. 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/QZFYZ2557451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa631f85ccc526adb3b3978c7e94a551aa6e0766b39eab09f9f0efa3f311fc3af. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFYZ2557453.