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 0x9f4c0660768d41e401a9f51119ca15830949acb5d510390850d4527defc05361. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2ec9f97-81b0-48ea-8672-bb7bedc54660.json and https://artists.proofprofile.net/proofs/artist/d2ec9f97-81b0-48ea-8672-bb7bedc54660.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 0x16ec9df111f3f5c7be0f82b75fa85e3feec32e1aad8ad68efa86cb615b7e60df. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/RUA1D2414212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe276ff3c18753a124c1609f647af7987cd5c7de501c597e69b5099ea98de6a7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUA1D2449341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ac2fb738bc7e1a02d4161e409ad140fd796917ade230a0c0b2ea187a0d2fa1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:22Z), 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/RUA1D2474276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ab723cad6e72908c25c79ac2a859b80a6b9c9f1244c3b5f395487e301337e9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:20:56Z), 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/RUAGV2411011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f7c5b12190ba2952e25bb02f31edd23295d680a1f1bc04baf7f387d102ad21. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:24:18Z), 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/RUAGV2501598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8c753f52c9d3745e930a9232f1ca96f997d546478936a983ae4fd0ac6fc59c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUAGT2554811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eb10896a204d17f5c986ace0a471a04460aef08fc4d3a1d2064e49ede41893. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/RUAGT2564555.