Howard da Silva (born Howard Silverblatt; May 4, 1909 – February 16, 1986) was an American actor, director and musical performer on stage, film, television and radio. He was cast in dozens of producti
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 0x0f3ed23f866c1b3349bd28e09dd0cea92646d2b6e897c475c2c947c7fe83e89c. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/103eb820-5890-49ab-b3ac-29c842a28502.json and https://artists.proofprofile.net/proofs/artist/103eb820-5890-49ab-b3ac-29c842a28502.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Oh, What a Beautiful Mornin': Overture (from "Oklahoma!")
Rodgers: Oklahoma! (Original Broadway Cast) (1943)
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 0x8fe862fc746958f1c9f4f78982bbf138d1ea996aeffd3af057f29062cbad523f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445601 — a six-check JSON result.
Oh, What a Beautiful Mornin' (From "Oklahoma!")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677b5d84e6899c0ed4ac937c4aecba2f8fa05971af2701adcad0c43de46f2e49. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445602 — a six-check JSON result.
Oklahoma!: The Surrey with the Fringe on Top (Original Broadway Cast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ebc00af7980f7f5b8382ea4f4182d2a0b1d87a790b9536cbae2d849607087b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445603 — a six-check JSON result.
Oh, What a Beautiful Mornin': Kansas City (Will, Male Chorus) [from "Oklahoma!"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a426b144a2e068fc33fcc08cabf22f8908b219e9046abfe01a799fed982941b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445604 — a six-check JSON result.
Oh, What a Beautiful Mornin': I Cain't Say No (Ado Annie) [from "Oklahoma!"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9c62218ba155fdfa8688200bcaf4eda2b1857453db225e99a66356c610a43c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445605 — a six-check JSON result.
Oh, What a Beautiful Mornin': Many a New Day (Laurey, Girl Chorus) [from "Oklahoma!"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e40204bcd48f0c31efeacef1999f8e860d8e156e534e3c86352b0b8b58e86. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445606 — a six-check JSON result.
Oh, What a Beautiful Mornin': It's a Scandal (Ali, Chorus) [from "Oklahoma!"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ab9204275418d0123efc9930b0e1b487ac1a958390e1b352652e97ec37bbbf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445607 — a six-check JSON result.
Oklahoma!: People Will Say We're in Love (Original Broadway Cast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b814f78bada6f4f3ad7c5c8cf2a4184e5b68c53cce22de2bf4ec8cdacfe9624. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445608 — a six-check JSON result.
Oh, What a Beautiful Mornin': Lonely Room (Curly) [from "Oklahoma!"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d74d0931232ee2586bea2b41b5aad64c2c0a76520aec6afa394e4802aa847. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445610 — a six-check JSON result.
Oh, What a Beautiful Mornin', Act II: The Farmer and the Cowman (from "Oklahoma!")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bbbba464475c9507fa33c752a33c4d7e20b71b2057992c926cf8bb16d888fb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445612 — a six-check JSON result.
Oklahoma!: Oklahoma! (Original Broadway Cast)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871b119315e1fc2a21ba1430a0bc9651bed5e142e2069883a5363148215018bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190445614 — a six-check JSON result.