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 0xf88f9c26f2ecd18366fce0fbdf2685ac3cc42e269365c11f97673a00302b08ce. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e95b54c1-4de6-42af-bb32-47d01e179de0.json and https://artists.proofprofile.net/proofs/artist/e95b54c1-4de6-42af-bb32-47d01e179de0.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 0x1105487e5c2d016dc24d3fd9d2f9bee241de41287d4c1099a1451850c48fa533. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZDA72589394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb6a3d6a77ee1a62cb11e497cf996776b3ecf42ef9d8ab023589197b3d9c5c3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDA72589395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce748ecc3f9142adafee2095e5af86a3cbf2602c6139889ca92c028839c7a3f. 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/QZDA72589396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1be203e51a7992d75c6e2eda8d2ce2e6cdc131b1d965ecf61c3683f165ba009. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA72589397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d480d1a7a8b2f626429b7883a12f4739f642acd090f95c5641273bc6e36e607. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA72589398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6926b35986191340c6778840c0ba68120e6a0e7701671303a2351931b5533502. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA72589399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56ba9c9d3b192c909462668846f710781c498940b56762067a7431c8b218667. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZDA72589400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3175013cad2f994edc3401dc1cf64f02989d0445595a39d29b49eb6cab3a9f9b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDA72589402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073c3209ab04c0ae18b02298729338fd515359f9be375d800ac5412f80fdcef7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZDA72589403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87cf71e1d9416290d611e467e6b6eb0e6f66b8a8ba41ab241edc24b3efced3e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA72589404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1545156101c0985cbf2d6ccd09d26d3d517d647d3d1d7ead79a48e8bde970a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA72589406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7797769206d3658e61a98c1bf92a6d2314322e82747313bd6908d86eabc7fe3d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA72589408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6374fe37511b647d66624dcc7220eba58e5d43d3d22dc9f3a6c91ec1300adeec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA72589411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b280fe665dbc11291d983c322a091b132879bc7a5351dbb72f4f1367859b19a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA72589412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c5b976ba9d7a2dc3abd56e99a3c0c40a5afe6efae0c09b1ade81e94f732e82. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:54Z), 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/QZDA72589413.