Biondo is an Italian surname. Notable people with the surname include: Cayetano Biondo (1902–1986), Argentine actor Flavio Biondo (1392–1463), Italian historian Francesco Biondo (1735–1805), Italian
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 0xb6d6576dd1fc9d1fa59929cce61fdc19aecdd0e6e247029167ec1e47d6a70baf. 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/3d7ace87-acc5-4a0d-b346-d1d4487fbaf0.json and https://artists.proofprofile.net/proofs/artist/3d7ace87-acc5-4a0d-b346-d1d4487fbaf0.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 0x55ab2f5df7b497c81bc388f020ae3fda7df1afdd463233c6177b9fd44cd09842. 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/TCACT1653334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9334be7a4e84670bb8014a48d0e32cead07ec2950b7cccf1c6116604370f59. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ITP5D1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb037d78e2375ef25bd1445c7ffd65b68e96b1ad818080c7dafe43cf690741c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITP5D1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13c652c9a289d9186fd63ea6f818d3635392e670e612943a6417437a9eabe9b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:06:22Z), 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/ITP5D1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfbd06d2df1de71a39b7db250ef887bc0b21590d941f9cfe45d657628ce177a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITP5D1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e468019d14158f205826fd348be8f1629222f15904de067c73cfaf4a293ed4. 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/ITP5D1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a6d1eb8cdbd5460b3a3d2904e016ad65e0e3aa79af7cf14ec0647cccb388a8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ITP5D1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e700b6388998259ab0602accc65de65cd8e5c398907167fca6b74b9e955f9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:12Z), 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/ITP5D1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785214be71e1284b29226f083f23c665d3d6a6e98b01607174844bb63022036a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ITP5D1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82491a0448ac96fb1f5bba2827d7bf1e27d831f2bfcbbd5bc8f4081356aa3d9f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITP5D1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7fa2a7f0d895587c85a67a4dcc0d291e48084b2663f98e491704b4d05e9bd1. 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/ITQ002100379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a45f6533bec78a2ca142a96e2daca8b6679fd8424a6f12a7f03f0ce486c2fd. 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/ZZOPM2110619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6df560ea77c6fea32bee9031158ed5bc501ba2d5aecbc08bd6b3b0f1eb716. 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/ZZOPM2226486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c73b7b758e4ba560d590104080c63e8532bb7a1178d633a8d90bdfe014bad8. 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/ZZOPM2228973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7fa2a7f0d895587c85a67a4dcc0d291e48084b2663f98e491704b4d05e9bd1. 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/ITQ002100379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77531ae8728f9a455d4755e31d02da79636b6abd52eea5c1ceb0a26ddc641e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZZOPM2228974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec74ddd3210781dd99d508552a5aac784856a29a3799f22239f723cbe516cb54. 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/ZZOPM2228976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969cdfc0b41f93422329afdd8b96da1bb7b5616258951dcc276a9df0e2d5a45c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZZOPM2228977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67177334e933eccac92c164f03cdda3a9ca5d0fb7b3387a3a1313464a024b35d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZZOPM2228978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6739e19956f2a860f7479063b5b349ec43697a64c29705333a564e1e267b9e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ZZOPM2228980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f9590a28e71dbbbb911ea6757cef254c804caf00caaecdac1b6b1e4b4f2ff. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES71G2317488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea15e7aa08fba711d99a5480349eb5312a9060136eebcb753adc95723e81276. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2236388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6112dad36c7f91755dc217a82766bbedd47aafd4f683cf5a7ba5137555f97445. 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/ES71G2325464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa39579d33ad38f2fd931e9a3e09ce3c3ae0385e689d4134f5ac6f87b727238. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2325463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b5385ce5ecc64628e4e8f672e675fadbd7642372430fd2589b2e4f9a4ef62d. 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/ES71G2325465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c45cab36582f5c57559db6d467eb8990facf17875caa703f24e73e9462a5b69. 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/ES71G2325466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f9590a28e71dbbbb911ea6757cef254c804caf00caaecdac1b6b1e4b4f2ff. 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/ES71G2317488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb905b5d216212ff3704bbf1f0f1379e8f9a45a419202a634ded1a4d61dddb8f. 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/QZHN91977722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab43a8db1fbe29ba4af9622eab2c37ac9e120abf8f0712d300284f92064cecaf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2325467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e6372970069633660ccd60123557c3df7099c757e051cd7a301a74aaaa7406. 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/ITP5D2000001.