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 0x4930b4ce83b195bf8f59a8451d02823c154c13eaa77acf1b9fe1775d9c6e1678. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b190620d-319f-4cc4-8221-014477b7c7a5.json and https://artists.proofprofile.net/proofs/artist/b190620d-319f-4cc4-8221-014477b7c7a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classic 70s Music Hits: The Best 70s Songs Playlist
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 0x79a8f214afe43ef7f98b3e67ef8f9dd8a998f98a9fa0bb4c60682e5a77046e8b. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/AUXN22118975.
Brandy (You're a Fine Girl) [From "Guardians of the Galaxy" Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c6e1219837986ab13e37ebf6c3bb7d63ec57fab428ad159e800ca6aee49ef. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/AUXN22118976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4792dbc2794fe05d19fd522553f493b314172ffeeb48445b9e019a694104cf30. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUXN22118977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551b89bfbc6615c1dd13915329868614d13a4701a5e2e9a411046200546fb5b8. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:51Z), 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/AUXN22118979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b891bb44b42ad9ad435b6538bbdbef3186d62b7815210d745d9c83ecd2647a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:20:21Z), 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/AUXN22118980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ae12423d6cb4ba55b6fba9a9787ad96fe85639f7d111c1d4a5d6711e352804. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUXN22323553.