Mario Mazza (7 June 1882 in Genoa – 22 November 1959 in Verona) was an Italian educator. In 1916 he was one of the founding members of ASCI () which became the Scouts Association of Catholic 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 0xc13d969e4b975da2ae875b0ea0dec9ecd2a6e04108edf1d42426f6536e771420. 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/fb909068-8b7f-46af-9fb7-0ae81e2e3307.json and https://artists.proofprofile.net/proofs/artist/fb909068-8b7f-46af-9fb7-0ae81e2e3307.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 0x9213161ce7793e49dc154615b8e79d095d54e927b9e2fb1a367b00a8da3e4acb. 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/QM6DC1574418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027f45a2c7c72d91271caee2bf180f3168116641b84558a268d3d01ba19c3466. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:25Z), 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/QM6DC1574421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a190a7af4bb668a5755a00a0abbf483796315474f01d3dcb65916f0fa5dbf93. 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/QM6DC1574426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf42841634fff0ef799de27f571dc58f99091fc37aa8cdf12c4697e166630e96. 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/QM6DC1574013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe372f87bf0e5d5ffea809634b530c098e65ce14cb4acfa5fd448cdfb121c9542. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM6DC1574021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc457f29a37d4bb47d874bbf3bba3b031297613b7cc444b209e581babddd8fcb3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM6DC1574024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff75b9d8923a2aad1a86b47035435dcf7bab927342794da774ba7f49ad51ef3. 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/QM6DC1574025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f868c4e2a20705ba23fe224812fe6b02549a35cbecfa746c309ed006c9cc5d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:27Z), 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/QM6DC1574026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46557f20b5bf500fbcfec25a9131e37f88dcfdf522e0601af68441884bee10a9. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QM6DC1574029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc4c95e48e5f107a1bc5ea07dae41f214e1cb369d9a60789ef2bb948722e9b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM6DC1574030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809e317950799c7ff7f95ab463524db46340db29d6c79081d0997c506e77b555. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/QM6DC1574014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b43c7f4c6fc8d516a9799a3a0f9480be3f74b0762cfb22912fb736b599c09ed. 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/QM6DC1574016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f2425a9d93678df2f8471abbaae91765c3375c8573e4a8613ce94282e1c4d5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:15Z), 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/QM6DC1574018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe372f87bf0e5d5ffea809634b530c098e65ce14cb4acfa5fd448cdfb121c9542. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6DC1574021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc457f29a37d4bb47d874bbf3bba3b031297613b7cc444b209e581babddd8fcb3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6DC1574024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f868c4e2a20705ba23fe224812fe6b02549a35cbecfa746c309ed006c9cc5d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM6DC1574026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46557f20b5bf500fbcfec25a9131e37f88dcfdf522e0601af68441884bee10a9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM6DC1574029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc4c95e48e5f107a1bc5ea07dae41f214e1cb369d9a60789ef2bb948722e9b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6DC1574030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba05bd10c9536a0ba3e31156f8a1146d23c21529235addbc9ab41f3b0577fa4a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/MX4971511307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b64a6b5d5e5376176158bcde7079f182a5728251dc505ae937e4a6561a862. 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/MX4971511316.