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 0xac164e66fd8dfa898e518fe170b52b966d0a4fc68338bd319a39587f14f505f0. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec7fbe66-cdd1-44ee-b924-29af912303ee.json and https://artists.proofprofile.net/proofs/artist/ec7fbe66-cdd1-44ee-b924-29af912303ee.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 0x20095f85913373f65c99971d72c7741b03adc53d64af4bb3f0b245753170c453. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTVM2374939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462efd656120aa244571396d4cae1123a3cf234d9fbb6aa37aab1ebebd1a71e1. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:08:58Z), 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/SMRUS0078561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4d4832ef1731344c25cddc92467098532e5b6f8bbc2260b12cb8486bb2c195. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:11Z), 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/RUA1D2553332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b8d505d0257ffb737663606bf00585377c175a7766d136065e640f633bc248. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/RUA1D2573409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3124ddc1652cd4d218bf1bf0c6a40a2c2abf3d3bedc0a89c3ea7b2e9f8d5d2a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/RUA1D2589651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35daf6a1d57d828402e9c4e2e9efa1fdf43d0ac01c8b8a1ab3652c0015a39af0. 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/RUAGT2521821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238c021219e1180b742c4be0c57952b0e9a602bae72c0f3785aa3cc765be9558. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/RUAGT2555892.