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 0x593fbd5c6ec3bf71b9c1ae80b3b062c57b7aecdde164e2d9fd256f35b3dbeb4c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d582fb99-82d3-49b4-838d-a5be69d43f08.json and https://artists.proofprofile.net/proofs/artist/d582fb99-82d3-49b4-838d-a5be69d43f08.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 0x02058f0b0a3f96b952a488c0ab1b5a12dcc4aad121312e37b77eafe565961627. 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/ITUM72100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5144fc0279005761edae2e153dfbeaabd061d9c0f74e37b30dca8558a26aa317. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:01:13Z), 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/ITUM72200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8167f5a96e5929ca1f213b49b07969450aed799e9d378b17c4423de419a84412. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ITUM72200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3074d83be0d09bf7c562e4cf1f47653f23276383b8d334445568008942b7f7. 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/ITUM72301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b25fd9ef50a7ef292700f9b32e26d8524e7ea578cb91ec6ead44b9bb2a510e. 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/ITUM72400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479519033ba123e897cfc6115d3043e0ebca27530ef7b8188be040798bac01fe. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:37Z), 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/ITUM72400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b25fd9ef50a7ef292700f9b32e26d8524e7ea578cb91ec6ead44b9bb2a510e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITUM72400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9861dae7520d01bed64e95bb80a80ac5c14597d8c7ec9da6b5236558620c866. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ITUM72301364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676cd3e8784119225a2fb35be4074aa5c96bd225e071974c198b965c21c2ca19. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:26:51Z), 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/ITUM72400918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6cb5b3a3bbbd3fa46bc23a348c0ae732f31de5248a56b5711862e89deced13. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US38Y2501186.