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 0x4a7db50d88d33b1b8317d984fbbb3cee129ca15426eac9957b91ca4f230ecfa0. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ec32e3d-d75e-4adc-83da-668ca7f479ec.json and https://artists.proofprofile.net/proofs/artist/1ec32e3d-d75e-4adc-83da-668ca7f479ec.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 0x399f3a70e654fa80e0833ac4f234fb18d3637826934deb8666b49b74a7637e59. 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/QZHNB2089139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a0604b9905fd5486fab5f4d5d6774cfb7f4d0540983cd002365636ac44a2d5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:20Z), 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/QZK6J2120875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31d11ce42bd46f869b57cff43314dca8bf40be847438c16e5c8ccfee742582d. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZK6J2120876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685edb33093ee2baf3e5371a966256f17adefe6c593936101b95a83a63a2a02b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWT2128917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8d53c8a299705dc7bc796065171bed3230bdc7a1625650d50e78ee90e82566. 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/QZNWW2130130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db4554a9e1f2123e977b7dfdefadd24ee133b787a9828b065fddb5acc29b8e1. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTB22248421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c70991754128e470ece8c386aecf20b274b2a36e61402fa62bd3ff0e378135. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTBC2350578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d96abf2a7bc278ee3c20cf1a151ac91e7b70fed18bb31ff93f11b2babf4c09. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:22:39Z), 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/QZTBE2309211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f6b0907d392b0b6f64796d8719f65f4eacae49db411a06e134833b5945b8f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZTBE2309213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda0fa80fab4e0bc449aacac41627e9308a822b48cfc6389ca9e45b20731c7e2. 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/QZFZ72475596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acb26fb2104c00dd14839133074151fe65985d5dcc4ad0537f089c4bb812a5b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN52426080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4215da9fb05c5be075984818b950958024eb6ca874f2560fc2670f3b53c2ede. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6K2465599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0317263da6cf7da05a9ebb403d1f58987b90ac84cf6454e178dcd5c23d09f90. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWV2477115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7d1e1cc24f2aef357163e1f0e61df2d0bc2e59f6f704d9c68382e0742c9d01. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB22406955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd8ca546cd6ff4064e56308eef35058a218929999dc027defe5d8f66a98a7e5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTBF2418292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18167a7f1dd5e07b979734cee06f5dcfa94d7ea8f3ec7b032a2c034f651490fb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:28:33Z), 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/QZWFT2440369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39751a3fc0b8012256dbe7916ba80e19194d0f0a5054a78c577f9530232cb2be. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZWFR2420503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899c15865143ecf35a4c20bc21b6b9b49d10581a31eb886065a8c318210248b8. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAT2590466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52b7f31639d2f3ff0f18d67ad5dc642d9e0b087e5c85005433e90888f11c1a1. 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/QZES82507694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c56a2d32606e3427af59019d386f64afe50eb81967d431f88286885f55fb15. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB42582667.