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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5920509e0382c295a26c07ebcfdde8c129710880296fe8f2a3224274e78b92. 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/09db5ac8-b3b6-4440-9571-76fdbaede42f.json and https://artists.proofprofile.net/proofs/artist/09db5ac8-b3b6-4440-9571-76fdbaede42f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9defb2f2ab29a6adf34d38ed9d5920dfff0b3b658310eee86035f17c46e85901. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFK2376135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd626b01c0343d51f0d1558b324d4b3f879d790b805c252afb3335b5607862c7a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFK2339184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4d5991e6654a9f3523ddd82d7905617ec8d12953eed2acf4d482d534305112. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6K2298495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cbc9fbf995811ef7bff122ee42d6ff7ca0f64100a328d203d4ad8001b47785. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX202031301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3089b02b081211b166abd85577fde72cfeb63bcf6924e20ed63ce9ccec9ce492. 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/QZWFK2374705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b0509d1d7bf15b8052f5ddeb14edb0ac756f8f1355c27855a7b729f5203a05. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX282121771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae879c098492886a586bfa218faef2dbf97024034bfca1edf9b9f896aaae5f. 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/QZWFK2376136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35d2e41e7fda814b6d05d58a08337f7ceb6b3d4b68eb7968a49e732397c8424. 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/FRX762141960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9070d940daa4f5b48eac73d1508dbc437d15d50d812ade4f4f3d3818bebd58e5. 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/FR59R2277478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c9704b74a2225c4787f1c41707440aef7b42f90c2f38d8a2c64e99040f05a. 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/ROSMA2200826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cee2eda36660779b20ff17484f56fcadfc24905d3a2a1b0a127b6a0f80e989. 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/QZWFL2363652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d35a515e9328ffbd15bbd2a3b8fefac252fe6e6efdb1fd06be224604844af20. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/FRX282399516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744fe559b3895f9e6636a69d15c54e96b641530a1102f593e944c09d017f4562. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZWFK2376138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd195dad9202599c632af11c53a588acbe52ee5c7a57bbd9f8eeafcbd7e92a9. 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/QZTBE2391037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d76eb3cddc3aaddf0856bf3258e17083a16319b1020e8000713fae766aa53ac. 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/QZES62472159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6fd54962099ad4e9117e9865e822f5385a9380ad24d3816f692c212905d04e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZK6F2482682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd3f4a866b68c9329e4e1514a86c0c30fab8aa1f80a3c8de6a8e8b96358c0e3. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZRP52424867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cff06704603de96e32041b60f53c708dd7ac3fb2145e9a719653073aef09bc. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZZ772420366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ef5d3133b7741253d14d70836b8e26363384122852b99fe431b9dc43d472f1. 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/QZWFX2434535.