Harold Vincent Guardino (December 23, 1925 – July 17, 1995) was an American actor whose career ran from the early 1950s to the early 1990s. Biography Guardino was born on December 23, 1925 on the Low
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 0x5a2b9523ae6ce9221a6165ba52dd94b4d50c51e293ed98f284f3671a35ce29ae. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/888df968-bc09-42bf-b1ff-575ffb50bb0e.json and https://artists.proofprofile.net/proofs/artist/888df968-bc09-42bf-b1ff-575ffb50bb0e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Original Broadway Cast of Anyone Can Whistle
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 0xbd62172ee49b027f0632ad9dacf6f19d28686d3cf59deff38382fcdf0252d9d6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10213306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81211b43eab185c8d819def7e9cf3df66c16470ce65e9682256ca05011d40bc3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10213304.
Woman of the Year (Original Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafda8b931cdecff897f6a7be01921ad6a4672bff1bc617b1d85360d355ee9e00. 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/USBC11500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b548d7fd88db6817745cd8e79eb7c07cdc68a451e85d910b5c2f9fd25d6ffc4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USBC11500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cd9fd08e661833abbee53231794a3dea644b041dc59da93c6fccb16978658d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USBC11500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ca8c13bdf604178be94b5fe43fe581ebbc6542063a1f8cfc66ca5dcc32036. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC11500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed94761bff6317912354fc2fa54ad6df61ea35ec8a2c1c9f35fd26443c2de453. 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/USBC11500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee59ffff389209120ecad977785e9af160c9f451bb753a078a7e737664b38914. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC11500084.
Anyone Can Whistle (Original Broadway Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e5c458432c9f1f9c4237ea96d7a33ebf99c2686b99879e0ee0e3a7fa9f00b4. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USSM10213302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77722216194985489d38236a736010b40f2290b72e9469e3e10695adefb34b24. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USSM10213303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd62172ee49b027f0632ad9dacf6f19d28686d3cf59deff38382fcdf0252d9d6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USSM10213306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384ca7c97c7de1061d19b237edd167c407a1a4fc971ed2240cc15f5d7411211d. 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/USSM10213310.