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 0x7b3dd750e57bd0bf1e6efd3c90e1491437e0ad27ed60c13ab23d56ca81e46d66. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96488495-52f4-49f2-8316-7c485ef8344b.json and https://artists.proofprofile.net/proofs/artist/96488495-52f4-49f2-8316-7c485ef8344b.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 0xc8a69139f882acfd91ea8887b446fbd5a8867e93092fe0815e484c1053a59a37. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BXOJQ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b4a05bed8a9470bfc54d27bf5453722c746179ac7c1806264186382df6ec3c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:38:06Z), 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/BXOJQ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95959e23dad87d5769debc445b4e0f8658c998deb1134f3d4bdc99d896e97c5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BXOJQ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1434f5f042f11663555404dc661b3269113483ecdce06670f186cac3b4e03b07. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BXOJQ2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eadbbf8c33680b0da8c9bee6e8cb8c290a537c1be66e5f70b8855d1c6c254e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:46:30Z), 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/BXOJQ2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78bff053325797e4427e96343bd529e56ae8088118a78777c2454a378a583a4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BXOJQ2200006.