Roberta Gambarini (November 30, 1964) is an Italian-American jazz singer. Early life Roberta Gambarini was born in Turin, Italy, where she attended jazz concerts, clubs, and festivals with her par
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 0x77dd61a8abd1ef78be4bcef2157a9079616082bfee2c3f15d104a170e2291ad3. 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/49c34998-4f08-4ecf-91d5-2489b5e0a6b7.json and https://artists.proofprofile.net/proofs/artist/49c34998-4f08-4ecf-91d5-2489b5e0a6b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xa85ba4135d90647c4778189785bfccbc2741ffb21a29f568b73aa49b7951e26a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USFWU0600003.
Porgy, I's Your Woman Now/I Loves You , Porgy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf798616806b843bd6ac481a4dce9c662614882c302552b1a795f80246d9a7405. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USFWU0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a0ff6eabb1a073be06e6e5a6bae87b47573b0fedcb225a1152281404342d9f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USFWU0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bda2f050e105279cb09705ca2865915d68dbe6d1a4103b0f480071f493318c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEC820678401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216b8c78456f18fea767035b95a132f041ab3a1ead7ea9ea7ac587e044866572. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:28:53Z), 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/DEC820678402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb64dc0144eac13dd1716315bdc54daf09d94aea8fcbd8c616247ff9116d00f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEC820678406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39648a2fd6d54176289368c3689e8c4c8424261566702d267022f33d08d552dd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC820678408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62115ddf1e5c4ebe8da4eae7f5317ff27b133a53c469578d688666aba6bb8a5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC820678410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6ec6d3a144e563fd47b2a086077e6203933c34b43e9aa1bb79e12992f17383. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUM70704543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a1e818a3feb5c83b4dee6c2521b0cd3f25258e5a4726bc70f635524411f2e9. 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/GBUM70704547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3398323aa0a78c3f1d72d930e9e8d8a92fcc948a3c16da13a44bcee1539da1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUM70704549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f49fbe18982e430da0bfe4c1b8a4e5931c2b322fd725b7adbeb156b867a72a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUM70704552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae733ff11dc7591c1aa26e531e2cf6a067c987505e89df7d709a7bf338a368f9. 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/GBUM70704556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d39a47dbe49840fbb8d2f871d52b36b64c34e414c4b81dedc5328197c671c52. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBUM70704557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe618a7f3b19b2d3793a1bb0b00a2e747c59c46aa36b68ee78dc99e7eeb49b41f. 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/GBUM70704558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14f93fadeb6b30fc8da651d2930f0291e5bf960cd25a4d07c1e73441f3ce54e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFWU0800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376d34397aa7b9da8c91732f8d50971e6afca9fc00c0d14d9efcbba37681df2b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USFWU0800024.
Medley From "Cinema Paradiso": Main Theme/ Song For Elena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc5e32ca358fd08692771db99cfcb92798b9621673e844d71e683dec0827b24. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USFWU0800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14f93fadeb6b30fc8da651d2930f0291e5bf960cd25a4d07c1e73441f3ce54e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USFWU0800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ae1f0ac484ae784ae7285fd076da0a7798e0ed8a9500bbf8eb461fee82cbba. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USFWU0800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa63ff840691442ee58387c0cd7a8f411c957bd3f019c4b360ef55c8f884d5f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH6321404646.
Connecting Spirits (The Jimmy Heath Songbook)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100a7b9cce517d38b2f9bf9b72baae0942f16a11fa5a2e5f74adb514b45d9e1f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEC822415501.
Disney Jazz Volume I: Everybody Wants To Be A Cat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4b97591892ff1fa26e58a271ea97fe39c92f0c7c2099c84c72b1eddc565340. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWD11049670.