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 0x9c03c26653c1baff096e90351ee5f28cc908255e632d3a40faad6f8a2164c3c5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cd6f4bc-8a43-49b0-b203-8fea4c0ef12c.json and https://artists.proofprofile.net/proofs/artist/0cd6f4bc-8a43-49b0-b203-8fea4c0ef12c.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 0xf7487e15e28f9c1ce84389ce6a1e13c27ab1583f341a28b8a80407761091610c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:17Z), 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/QMEU32023594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe409b388a43eeb128298adf62d9fc557f710ec9c9145a6cd4943e346d8456d8. 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/QMEU32023591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17fd37999c66035e7410cd10a87935e64013074fad5996f4f1be0f74b3913e1. 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/QMEU32023590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400325966bba5e4d8369f501118ae6be5a5b0307ca8273420dc44e1107f3ab7d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:49:03Z), 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/QMEU32023592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c56866b2edec3fca1b7fe0c79e154d11f8c8051777d2f0b2a32be94c2bdcb7b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QMEU32023593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931eadcb17d95d43a20c4a12bf5f92ab82e26df3745c41e5ed2fdbb967806676. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:36Z), 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/QMEU32112311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf617f4cae083f2dad519250696f317db02a57b68b6c70563e97af3b58dfcfb59. 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/QZNWR2438672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43268410df0557117c766e3807fdb715800f1f242b5686d9a813096d4fea3eff. 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/QZWFF2473606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bee818b0c31cd0ae2cce7fe3e1abb90d8b220c2c4ddb2500d819b8d82cf613c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB62464195.