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 0x3708a05d196c37e2b0ad457ce71764b4caf989b3ef64a8543c59444ccd75b35b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b48455ff-cbf8-4621-bcf8-9d2d81dc1fbd.json and https://artists.proofprofile.net/proofs/artist/b48455ff-cbf8-4621-bcf8-9d2d81dc1fbd.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 0xac7a06c55b6b13cdaee25ccb205dd09a0db71cacd7518516936d1d5737837186. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NZEL00300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d9e5acd1e3e1df9e41b8eb7cd53b39ebf4b7195dcd5312f629e6951bcba5b1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:06:02Z), 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/NZEL00300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d999cfd4f756514aa72042258a8c7056fb75945762f8091b07959cc772567c0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NZEL00400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a1c5b12b5e050bb52c27d17bbc8675c979ddc6347250bf2e6688afaa67935b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:25Z), 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/NZUM70500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea0f528261b5e316dc422257e4401c0a63a44279a49535430cefccc4e1bc8b4. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/NZUM70500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0918f7c0233ec26606b0918965c4ab5cf1e9fa09c95e4c7fd6800564b16d8f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NZUM70500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb9b654ba8b0095aa87724f8972da99b6e649a98ba52c261bea16f2aecf584e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:36Z), 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/NZUM70700333.