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 0x836bc4791ad2d9e8cfd0350d01be0d5454655ec08662a7daa5399a700e559099. 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/86052e22-03b0-4b2d-b2e0-fe2f24097122.json and https://artists.proofprofile.net/proofs/artist/86052e22-03b0-4b2d-b2e0-fe2f24097122.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 0xb48c1cdaaf0671c8bd8a2b4753bb279ca21f438f43ba611cebbff9ffa64b1f0a. 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/QZWV32460193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13a6fe8ae05568d67b5b8d16cfc271b949a6be907f0aaefc75316d35d2353b7. 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/QZWV32461343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b33e3abd6f70816b3042fe9082644151bc265d8cfd3d7c2feb0f0fc802a4b2. 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/QZWV32461344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c7c8faecc76cf125be862b03c97359ec490e80d69c59406b42911d30e6b625. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZWV32461345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93337c6dd695804953430619b094cdf0c237886d1525d165b9e8d6703f057412. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:19:08Z), 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/QZWV32461346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629a08f2f1f4f9decb17d59ef96fe37d86e797c458418fe4ab0693573babfeac. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWV32461347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe833b87b293542d90d8a57ad22089f35ba6a96bd1698a01dc42a8aed90daf5da. 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/QZWV32461348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44524222ce059be252707068f989cf97154612610d102e4eeb55920bdde8f0f4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZWV32461349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105086f94bf4ec76359f350f4a9f5ece6bd90cb4ca03326968c3324ec339fb39. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWV32461350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e1754e467fd6372d0c76451ab064e92790353dd9d85457a5fc742bf234fcad. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWV32461351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaee603d85da69de1be84b3ec08459f0131cad22f51196df5407dfa64a674c0f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWV32461352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fe696cbab1715a7398f56e28cb666e765033eea92cf986636faee7c0ea1e72. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWV32461353.