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 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 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 0x6ed808c1ed59590b81d7fa23e90d4627a9827f86662c9c8fc4c61ca409a5317c. 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/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 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/USA2P0802912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2cd1f94a2e8bafe4552b6a95d1d3addc7898c2c0664cb066afc42b1700fec5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:47:14Z), 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/USA2P0802913.
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 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/USA2P0802915.
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 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 0x28e3625977080e864c63aa456c10362d3bfbe74624a382fab3a1db2143fc7b07. 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/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 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/USJ3V1290630.
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 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/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.
I Love Subwoofer Records Techno Compilation, Vol. 34 (Greatest Hits)