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 0x5018f3832c2364071d63f1f4bd91b6f9187e70cfb59afd065d92e2e8df404bca. 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/9c040d62-e805-4ea1-8095-8ceccf9f583c.json and https://artists.proofprofile.net/proofs/artist/9c040d62-e805-4ea1-8095-8ceccf9f583c.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 0x5f1f8ce61849040c6a95e193f96403a7fd8d3ba36da0ef5160856a2780c7a152. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCACY1714507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a14c060d3e6919b059e40be780845c3b0aa88de21baa8b6a65af9ef74c22f97. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:25Z), 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/TCACY1714526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a573f2d9c6f23dedc2f8b3aa6f8d074ed4ff6d18095758a32213f95a7fa305. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACY1714528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a75711133be3d2ad417a46fbd927afa49ff7237df3abc343261eec8c8cfd78b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:02:24Z), 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/TCACY1714546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00666f1fb8cb4336fd29840fdeb77f9c6e6f56792d352ef0e91e9ad098f9c288. 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/TCACY1735298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e25af0261e6fd37ac9dc7e3e17946a1b7569be59bde56189b766e7d78e9504. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:55:20Z), 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/TCACY1735299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcee2438ed6952eabdc1ff5d20bc974590fe1499bdd6e0ea1c232380285c0a0. 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/TCACY1735300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68257e524b6bf9a728e4c20b8d3a10ad3894f17b0607c2b7a2335b7e10d18f8d. 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/TCACY1735301.