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 0x9580c19a70d93e8f45e4ee1a3a7e0f54cbaa48c9d5a4095bf0a7c765aeaf9301. 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/36cf9eac-257d-454b-8188-456783962cb3.json and https://artists.proofprofile.net/proofs/artist/36cf9eac-257d-454b-8188-456783962cb3.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 0x1df4fa32468e31822096fe94cfb93dc062ac3493314ac76efe72d8856b1d3d83. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/BRUSA7600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2836ecd50ad64f2feb92f819e636cb502a9e5e1279ef878e469d39f61141542a. 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/BRUSA7800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ea42d0fa67f43c87fc3ebe2ad71a0a88073951f8f3e7f3328fe23ec9a65f18. 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/BRUSA7800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dff0c54255bfb9ef85fd91a4c26531bafeb706df3c00456544e244afe01aa13. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRUSA0700439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e597b6360580eb2f4c601f3a3ef92417f9ab1d6bb746341d56b392e5ca24850. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRUSA0301229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfefbe37024fab1146f551678c3fc73d7d04eb34da045c2c46e3b1b602e7673. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/BRUSA0301230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41411123f0fb47a065b873312d89e31f77e3bcadc5b15ba4c2ca1fb884c8b8e2. 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/BRVR11100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519e9404da9bdb796c865f2edee7432bb7bc958297087ceca6b6ee4601407b34. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BRVR11100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf751bf9c1ae0e051672089133425509381b3a7c072768fc5d6a21ea6a275ee1d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BRVR11100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788842758d14824fac4acb4eb13c77a89520aafedd4d1610310bf71e9a3f5fcd. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BRUSA0700441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb800bcfdbc39791c34172a9fedb2daa74ba77eb578d031a928aeb37c5861ebff. 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/BRUSA0700445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c99caa9e9a5789a6e04c0496b2eaffc26ada096b928f702c924dae9ab69cae3. 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/BRUSA0301243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93902f71c1aedcc65a081c1507b413712662c1a65121dbdd08e14b5289c63d83. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/BRSSF2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2968f9ce208b73a90ea25a8f783850b4f6c99ecde8b5b2e2d8ef3fb3f273e0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ5AB2475645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea94d0451edb1591fc4401963ed42de8203c49878b11d0fea018e6e734f59ca. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BRVR11100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f0779efdc5680427f4576a5c2bd390c19431310d690b9e01c46847f5225d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR11100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b29a44311b16ddb65a9f9449590b97c0aa893d38c3ba00c6c6ed47999c7e993. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRTMV0800226.