May is the fifth month of the year in the Julian and Gregorian calendars. Its length is 31 days. May is a month of spring in the Northern Hemisphere, and autumn in the Southern Hemisphere. Therefore
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 0xbb41dbc54cc11c2c98ce43119a1e7af6acbd8d5441ee201dd2cf7b1340c9483c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83ab6c65-5ea5-459b-98f6-b8a80d1e96dd.json and https://artists.proofprofile.net/proofs/artist/83ab6c65-5ea5-459b-98f6-b8a80d1e96dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Al Sahm al Taéh (After Mozart's "Soave sia il vento" from Così fan tutte, K. 588)
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 0xe0c397a2b531dabaaacef9bc2804e44914546b753fc137c2fb1e6c2322e6ec4f. 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/FR34F0500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e3c27290dbdb4619d565c31823ee9671e2e9bd181da3b7f05eec81f89977b7. 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/USBB40580261.
Ya Shady Symphony (After Mozart's Symphony No. 40, K. 550)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be7f89065e96882a78138f89a723be97c865e356272e06f70c27c197f64f615. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR34F0500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be7f89065e96882a78138f89a723be97c865e356272e06f70c27c197f64f615. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR34F0500100.
Classics Reframed - Bach, Vivaldi & Mozart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c397a2b531dabaaacef9bc2804e44914546b753fc137c2fb1e6c2322e6ec4f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR34F0500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be7f89065e96882a78138f89a723be97c865e356272e06f70c27c197f64f615. 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/FR34F0500100.