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 0x21239a652f86d9a4440bfed78f04939675cf3f5b8fce46248f8dbea3f88154f4. 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/85527453-7158-4e46-b12e-4ef5f0c3b092.json and https://artists.proofprofile.net/proofs/artist/85527453-7158-4e46-b12e-4ef5f0c3b092.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 0x33ad667c8cd7df9387580f48df5a657742eab83a5553d5b1f0365436b2efb356. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEF078302550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8d43ac18cf4aed6b355bed8e2d7c32541d59fb25d45f4dcf8667caead5552a. 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/DEF078302580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaf5f34136299c1fbfc0f820582f3f9eb8139014396a2d27985e6681b66b23d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEF078402980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78084e71380dc9c49fb3aa61f524e5b790cd50a7cb0fe5beb46100d23bffb78. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:16Z), 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/DEF078002640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8fed438d0b7c4488693b34818353001fbc32adf917d3dd25b67020a5e5dc86. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEF078002690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa355e01ccf82b3b0dd6b698864656412afd24c67c2b667cf3ebbc29b2176390f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:25:05Z), 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/DEF078102590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd85d12939e0d4c4c997a5018a7ac6f1836ec4721ab11c5400cdc9f0165c130a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:36Z), 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/DEA309310500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef24825be914cb8e1c442c517bfcb3b17b015e983ab2c0072935141bc9567019. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:53Z), 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/DEA309310540.