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 0x8356c2eb63c9269b5814dd1b9b63847e62f26e804cdc880f2178c5b6ce8abe11. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa3ac64a-6b00-43f4-8b40-1fa5e0568507.json and https://artists.proofprofile.net/proofs/artist/aa3ac64a-6b00-43f4-8b40-1fa5e0568507.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 0x38470685797d0c0873a65072ce0766345b0f2aa1cfc1b8259be2a4571e7ea702. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:23:08Z), 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/QZ4JJ1830274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13939e90ca654b0bbf14477dd203846c4364371c1e53fbb9d33fb05187bda1e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:50:33Z), 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/GX4LG2100382.
Sir Step Away (From The Telephone) [Bonus Demo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad12b50293a42f119dca778549adb65810a71f06e4835d57243157a7a38bc1. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:56:20Z), 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/GX4LG2100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0105e1b6c4d6c5590b78cb0eef8902ded8e648a70cd8a33ccde95a8e2aaaea24. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX4LG2101294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd454fc4b928f137902372504f67cc969cd92a8b21bd14d891f13af03005b9ddf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX4LG2200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c03956d77e60cb10e8ba6033f3bd2b0b1a56b87f472b3b099c327e682b9a4e5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GB8MX2300912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8190c3677d320517e1f67668e352e76c8b464a062ac513774bf5d11b4431c516. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US38Y2401158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345d35d0577b7e1d2f089cfd789b12d8dc911775adc5cc9a447e33b7feeb1771. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:12:58Z), 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/US38Y2407310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd970a13426752cb0c152e374ef6c86ed42cfb370f64458e7cc2d719d949b9bb2. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/US38Y2416635.