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 0xf562d4e7331c9c11ff4b421bdc955507414faaabbf346ce9c36f07c3b1f4471e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/418f93cb-0832-4877-9019-28516f45d1e3.json and https://artists.proofprofile.net/proofs/artist/418f93cb-0832-4877-9019-28516f45d1e3.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 0x6ed808c1ed59590b81d7fa23e90d4627a9827f86662c9c8fc4c61ca409a5317c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P0802910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc91b70b12072dd8d6d325ece4e204287008d70c9ad45100aaf53d58440fc320. 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/USA2P0802911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29c5b8db516eceaf5e87941aee35cea9e952449fbc8095ca2c452efcd12c37f. 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/USA2P0802912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785bf2cbf7ed10e56b85503ec35e3c5ba300b275874fc02b58d5759b0c51f8ea. 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/USA2P0802914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467b1a5932e0d4b193d4f0bb7283735f7a910f756af8721eb1fe59779a9df77d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P0802915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a93a76e61c04fef976d23bd57bed0e7ef6df165bc529120976212f5fc56e6f8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USA2P0802918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec21174a99327720b614b799b641e43ed36424246e5a47b5198d1f807830a93. 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/USA2P0802919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4520f9be4817d640f2c0a122b3cb01afcd87cda45808cfcbcce2de3f9cc1f2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA2P0802920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442fdc3ec85ea8a61f2edf9887161bb22d4555147543072317b0f707ead04ab6. 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/USA2P0802921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00fae9f9fe790e2330918728aa35ea3caad561f970d40fa41a19edcdf0fc9b7. 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/USA2P0802924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815831ddd5e32a0ac7835e2d8740c5ec984e4402e9782ddf354285bd21247325. 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/USJ3V1290616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51847c22f1864589b01eebc2d0390988e47890d3dd0065261e0b78b824e6e85a. 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/USJ3V1290618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5ae9deb3f1bcb8d497731b81368a1dc6e6f9ae32228c0de37b37f7f89bfe68. 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/USJ3V1290620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6111bed73e5ca3df489da0e96114cbf9118b4e196e43754ab318e7a8b14c611b. 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/USJ3V1290621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8a26708795771a80904bb1643882bf7ea36735c9a80b03f970db898c9d13e5. 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/USJ3V1290622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b65287a063abd9feff68fa3432f1927d8b193202e531d6e949708603d76baed. 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/USJ3V1290624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e3625977080e864c63aa456c10362d3bfbe74624a382fab3a1db2143fc7b07. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USJ3V1290625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5319345e01356ea86a00cefd13b2a51a889ff77f1465bb5878c462adb9f13539. 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/USJ3V1290628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afd1030007d8185a590c81ee1ab4c183145cf8b43fd00b019d132e917346980. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USJ3V1290630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797ea9991c49a442534994e7077349c3704bd184610334da01415c7c9163e4b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USJ3V1290617.
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 0x8e1622f0af56a9a952ed4b47022403cff95cd4c3426cfbcf3eefc5d160cc5948. 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/QZMZ92466590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233a66b9f31d0fa965fc63dafa8afc935c43311b8515827882348dfa984afb0d. 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/QZMZ92466592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace0d8bcce86c3bde4b88dbac9a19cc52ff1381afd2f1ed4b9de8577ad2fd1c5. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZMZ92466589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2cd1c7ed83a614aa6cd74d728e1acf719b6a04a01ff298b21c4dea2800789c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZMZ92466591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c3356650195b9c72ccc5a94e7045e8961797eebd15b79fa0cf6fe31349b08. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMZ92466593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261f93e553416b7a870213f21207a6578be7d0db468af7a7fc6f90ff2f15cecc. 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/QZW9K2274594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc5efe6431e46995ffc5b57cbb60cfa9e2b4c2c2898860df83b864c23b14454. 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/QZW9L2230766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ce99d88df05e3a2fdcbc1286bbcd0f605d7a1426a9f502d816fae02cae7483. 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/QZMEM2284786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881f7c4a6802b2f35d7d2adc7e50ccc50e6325c99559f58822d66eeeaf0980ee. 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/QZHZ42223907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b808a60287b2bf7a69a13ca01434e612f9a3fc87e5aa81fd59a63bf91df7fe. 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/QZNJW2118871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3494d796e23e1a51efb1091a597f332fd660229dd23594be45dcdbc1d9dff9. 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/USL4R2083925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496ed8d3db5d8085d7c5c57b359933f3d58078351ca317708158e1d04c4b2b7d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ51921712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e48dc145bccfa07d9eb713be3cbda867b7a998f9a0303c67cc81893e92916bd. 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/QZHZ41997552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65579bcd3a02ccb1abdcdf3f4a76e071454760b47d1b8020c73fc2a92e154e9d. 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/QZFYX2571955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09acb52c660f1510f6e7bb8a75e91cf2790cdedc65d0a952fa560955856fb910. 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/QZTAU2389020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a23fabd594df398fc7c380bc8fe5c16514e95998d9e69b4e7e1f5671428caf9. 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/QZHNC2288514.
I Love Subwoofer Records Techno Compilation, Vol. 34 (Greatest Hits)