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 0x695bf021010cb99f313b5a6c2f6c7bd6538555a83e21ec185825858853e9bd59. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5365f7f8-14c3-403e-924e-313013ddc69e.json and https://artists.proofprofile.net/proofs/artist/5365f7f8-14c3-403e-924e-313013ddc69e.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 0xf0fa72b0dfed6ba03736ea689df620a201bc4d386df4270200798b7cb61d421a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNJW2566719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e04ca4bfaed4e968d94acd23fba5106cab53f32b7a427733366f0f401787b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNJW2566721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31e0b2faea3ba56b46d8d5e9f193f183b913396e5dad1cd36992de5b6e1fea1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNJW2566724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeec99ea2bf166dda1e66e718a42fae3a356f44847ca57828a2a7bc00f7cbfc3. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:09Z), 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/QZGLM2594295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63edfdb068add34f4da3ff2c4d914d26f502030c8b2cb803b7b0eb5ac965f26. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLM2594296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b18aecd42c2dcb3ce9ac7a2aa1d62fddf6f347d6000a254596c29e5cd746c2. 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/QZGLM2594297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e687c7db893718ba0d23d7788f5da7515bfa597849cc03436d4b05c6220213b. 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/QZGLM2594298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44dbda5b48d59c251ccfebcbc96c87485a0610ea7b5b0ee9c756ab543f435f2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLM2594299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfcc72e1ad89176d4902d0655cec6406e154469c29870888e7e7901276358ad. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZGLM2594300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f74e60079c09fbd703480623dc8922e95ba4d8f585512cba779dda69d234d3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLM2594301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ce8afabbb95e94edd3903cfbd79a19a8aa44b2939551b8ece19d58e5406564. 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/QZGLM2567797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaec345ad44ffb356b43ea15bdcf27297297188a5d3f8d9e61dadb986f072283. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZGLM2572260.