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 0xd585d8ff7973aeb7c6e9fb0e35903865958a89758b5952a1e5fb25e6951e4c34. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b61bf97-387a-4094-999e-0739cb6ed831.json and https://artists.proofprofile.net/proofs/artist/8b61bf97-387a-4094-999e-0739cb6ed831.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 0x20965f5ce58576bc59cfa43484bd78ba109e3f1b9c7797b5ea9f3e8a225ae3e6. 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/QZ6ZR2200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83711659e0e8a7e7a4040e07a6575e0e376f8b5c5e5809260e69d6b09f81c15. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ6ZR2200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fce1bd005c8affbd203fdb41e540d41439cff906155d4bd1a0427b482bf636a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ6ZR2200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5ce2a52d11103bcd63f9c44e4bdd4ddb08ea30ff344d0ee3abf39aa04d24b0. 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/QZ6ZR2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fe33d42da9ca0cab07fb86a02dca7f215bb3c8ff2aaa7305b1e71c7decc99d. 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/QZ6ZR2200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6acebedc9a186692fc0e5de1f3f9a4aeaf700ebbe0b6c6dcc72d1c3bbb1d451. 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/QZ6ZR2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ffcc64aadfc3d6978da65868817ae2a79b95190cc86f1ecd5d82b7ae0d2b17. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:56Z), 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/QZ6ZR2200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940adc12b3ce2dd014ef6d9c5454283731d0b0e1a5fae62763c321144ac0080b. 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/QZ6ZR1900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe798e5525e2cc2ad493d3d266ea95003a8f67c8efe3a0dab5ae0766480a17780. 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/QZ6ZR1900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9fd08054c882688cf4b20bd2ff22d1652101d7ddc4a7e989c33b76c5294e9a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ6ZR1900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e31bdf9841ec36e7e59a12c7baac30a5856acf28832cd359b60cb2c3456b6ab. 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/QZ6ZR1900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c599acd0c508fe5dcf5feb994babd0b53e7c32f206e9ebeb1d7a73aff7f4ba. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZ6ZR1900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8335f58ec4caaca603172c78b91d3e5d767bf54c22d29becf226b1e54f4bff7e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ6ZR1900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dc09180a20f6043a06c5a30329617d4b9c6d6924bcd44deb7730f188b7736e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES91969401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4cdebc7f25ded232fc326a75503fbe340ec920f7d813b7fa8be2d248437204. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES91969404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5ce2a52d11103bcd63f9c44e4bdd4ddb08ea30ff344d0ee3abf39aa04d24b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ6ZR2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fe33d42da9ca0cab07fb86a02dca7f215bb3c8ff2aaa7305b1e71c7decc99d. 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/QZ6ZR2200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20965f5ce58576bc59cfa43484bd78ba109e3f1b9c7797b5ea9f3e8a225ae3e6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ6ZR2200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e31bdf9841ec36e7e59a12c7baac30a5856acf28832cd359b60cb2c3456b6ab. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ6ZR1900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe798e5525e2cc2ad493d3d266ea95003a8f67c8efe3a0dab5ae0766480a17780. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ6ZR1900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c599acd0c508fe5dcf5feb994babd0b53e7c32f206e9ebeb1d7a73aff7f4ba. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ6ZR1900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe33b6d86730588198c534a42b92da19fd2d195eb7639350bdbfad60ec20b9f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:34:20Z), 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/QZ6ZR1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48894cf9d596dc7d9fd1db3701867ad96c83fde35abc71043b86fd401752929b. 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/QM6P41500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b2fd2dc1329e9f21e0aba41decc4281ca4d0da230af9e7cd8bd9129161ce3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US2851610001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c09bd77047a43df408b76220031b5043c9bd889a7932503907ff68991e310. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US2851610008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4561ed9599e92fc33fbc18b6dbbb0425057e3db8bedf6d07562034e422ff22. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US2851610011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83451d8a6dbf7bb24e59e662e47ab18850aa80504c2100ddc2b695ae3a2c57a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US2851610012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc68bba6e5cfbab85a12fb4540580b90b49db145758f63c51d548f72b8ae0df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US2851610016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2d14288dfa1d249680789744eafc6dd730ea8ca339941ae60d6de23b26a373. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US2851610022.