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 0xa6d083887154bc80a11bdca380f78fddc8af856ac0c0a4210b7eb2cb4a0ed72c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bd71d67-cf09-44ed-8859-a110fedc13cc.json and https://artists.proofprofile.net/proofs/artist/0bd71d67-cf09-44ed-8859-a110fedc13cc.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 0xf154038357eb7f1c8d0b78c26ee00973f4030710db4a833fa3ac0e7c9c927a7c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI369785010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e0b8424fd1e82bebf9b47e82ab604e9e41b306b9529d0de60981f592bc6895. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLUM72400389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b9823902fdeb63580be916009b962c1fd9bf7fc8cef784b277cd18083fcd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL2DY2400698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cb646020d39d1133f11e24ea741a914904086bb501b78870d4d42fe5b67512. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062407398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b9823902fdeb63580be916009b962c1fd9bf7fc8cef784b277cd18083fcd1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PL2DY2400698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7f0bb1507b346f6e8f62ee961b30547457443ac594c8ed640bd51a7f875212. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLUM72400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11503577c7724d7c9b857bccfce1ddd4bec6ad11beff26719e3955b6c75d3047. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLUM72400392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e0b8424fd1e82bebf9b47e82ab604e9e41b306b9529d0de60981f592bc6895. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLUM72400389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3c4fefa4565af475eed849ca7af11ff551d182b4a505cbf855daa1f6aa1641. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLUM72400393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8855a3188bb863d003cd2f7489e062f3f6a1f84edba6ee2c7f0e38f52ae8e0e9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLUM72400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa066012b44650540686baeec7795dfa42d58f9d8a36d882c2dbc1337c97baedf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLUM72400391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f437151f64d842eb873da45223dc8b17e923fd713699b87ba7d024f219f21b0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI360657530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ea232d7910aca3707d4b14ae2996bc8b61406591a4e0cc75490b83779deec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLI360657540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42789a88971f3d7925d5ecd7d7c44d41b70e0f15329d971eae5332dc175bdc96. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI360657561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc570c8a30b9e6d10d1495b3b945d093de9964af91e1514cb70b943b7ae0dc637. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI365752570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b40f67e696f808301a1df5ff1fb1fe2898e10c6628f21e638adcea06602e664. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI360657580.