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 0xbbd9ff5e75ebe6cc1bf772451f8c26e711e0a144d3e4e659502606746b81db27. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f2c6050-5eac-4a7b-97db-30e99cbaf738.json and https://artists.proofprofile.net/proofs/artist/3f2c6050-5eac-4a7b-97db-30e99cbaf738.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 0x05098ed89dc62fae1431bc9ed95b12ea154fa4e81c5bc163306b7111e667c960. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ4JJ1784755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f72399b859c0f16e67873c0bcf4086339291b0648cda50ecce2c347c855c47. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZ4JJ1784759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e5882d9f4c632a98888c1f36b7e6b15221b5c0668138a6ae55efdee933357c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ4JJ1787370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5018be77c9115439d9ccc29e673797bafeaca4e29be370bf65fe8e436a5e57e. 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/QZ4JJ1787449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6441c27fb98aa62e665f4bf926964cf11f1b62a02893c623d9f77dee4e20137. 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/QZ4JJ1787450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bd695c01dcd557ed0431cb2186e405433dd0ce1e33b2d687d2e4154b56b5a8. 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/QZES51813294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c96ebf3223112c782a0b2e0e15ee740e4307d9a978a7e0af91e317a093b0cca. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZES51813295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14e8ba7575b6a378f394df9939e183f9f9299204c0ee40279232e4c4609773e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES72004325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6f8bcbcce707217c82c35434c2a84ebebfd21707333d03151bf31789ff8abf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES72004328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2c64d2463649f148fdf54980d96548d98686e8cf2630cffb853e59ab35cf3f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFQ2582074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb09b4f86650a1f27105aa50c711fad856acac29a00cfcd241948691ac96945. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFQ2582075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90c4625b8d0809f0d26dc2fbb86280e840bdeaa4ca0eb64b4bfcc9a24a44906. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:31:12Z), 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/QZWFQ2582078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692bee993c2a30259d5a01902db1aa82175a7fa47feaf309f5b700d83022c510. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFQ2582080.