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 0x8f47c883c2c5ba829e92c6b14879faf08316c1b819f9311d654658cd1a8b5e97. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0f2a4ff-4304-4d96-a62d-1e0aacdb054e.json and https://artists.proofprofile.net/proofs/artist/c0f2a4ff-4304-4d96-a62d-1e0aacdb054e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Three Ocean Variations for Mixed Choir: I. Havets hand (Hand of the Ocean)
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 0xa8837e3e16f0a48a29136268d7d50867d9810af5add6fc0cda99031aeeb5fa1f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAGA1702202.
Three Ocean Variations for Mixed Choir: II. Vid havet (By the Ocean)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba6f1089709c2f36ef3f53d94de33464257cdb6f9efc79b3c9c92b74fecad31. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAGA1702203.
Three Ocean Variations for Mixed Choir: III. Havet (The Ocean)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b43507135c184c4230746aacc18d195fdbc2a6e95bbd617b1168b849c67872. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAGA1702204.
Two Folk Songs for Mixed Choir and Piano: I. Ant han dansa med mig (Ant, He Danced with Me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9913cf01eb3c8459ce1ad7ddae2953c05c3588ccd8b4f31c8663a757efbbe7f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAGA1702217.
Two Folk Songs for Mixed Choir and Piano: II. Femton finnar (Fifteen Finns)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626fa830b7588536f4035e1a1baef9f46e8bed8ad16bb9c00d3c09c36c0f47d7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAGA1702218.