Léo Tarcísio Gonçalves Pereira, (9 October 1961 – 4 January 2007), better known as "Padre Léo", was a Brazilian priest of the Congregation of Priests of the Sacred Heart of Jesus (Dehonian). Currentl
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 0x031353f4a7b391f02a806cb4bb89f5703cafd15910375ed0332422adb7867f0d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5230a7aa-0bc7-4385-9ab8-845b90e41192.json and https://artists.proofprofile.net/proofs/artist/5230a7aa-0bc7-4385-9ab8-845b90e41192.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 0xeb8ece74798ecd3d7e08793e19905e9cb34553ca2ee82b4f73dd0c498845c78c. 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/USHM81960790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbe57c83d684fec00cd73696fbba88350428d3e5530b24fb4e391a09c9140ed. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USHM81960791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4831b99a0ee786237efadccc613a7259d6d8ac8a15d24c378471086dd41c09b2. 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/USHM81960792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b1f46c5ae5b8d5633619550bb9571b63cb903dce7a086bf59488b38c0fd260. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USHM81960793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cac0c83a3ca6df06dc07c0c5940ee8f0b5bd89766512ac85cbcf0ca95af8a9. 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/USHM81960794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e04671b136b98a2cc16bc87f881720f2d955c1da81cc5270ab2a4c2c19ccedd. 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/USHM81960796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ded9c5d4d90b250354934af9b77add6fcd095cbdf646fd73b6751784b40a2ce. 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/USHM81960798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4501b0f155d8065409656b12283a7f294cca0336ff62e3f98c8efe142ec44bf. 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/USHM81960805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80d5746e465b8331500c9ce982ff5ad9ecf8d37a0a98ca0630db93b7ca9aaa0. 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/USHM81960806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f38cf975a97be511cea018dc97fe017ba6f88050882e44c7988ce3367c7971. 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/USHM21590717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0210b348a1c4d90180bfdcd6579290622803c0cebecf52afc3a084d64d270c81. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM21590718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b54a66fa2e3fef6f2457d9d5e2e83e2df038881d74ce8091690eca21e88cff. 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/USHM21590719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45857d2bf0f3754b9ea268701a443f29376c09da7c75febc0160860f1dcf17b2. 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/USHM21590721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6fb4585099d4a8b00fb2347520bfd822d7e4adc8a10ccfdf316076f4e677fd. 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/USHM21590723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e9ccfc49344a441e954c081c35a367308107f489c06a10f31c126b51896dc6. 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/USHM21590724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c3fc377c11073e506177616926b65032699e67155fec9c90e84a7e3370762e. 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/USHM21590726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6befa5f0e6a73953bda0eea4693823f74312d446e98c92932db5c24ce9e8255e. 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/USHM21590729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99274290a83524877692185eae961f3c6a24cbea98ea1ac0daab713a31dc4786. 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/USHM21590730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba880f0542a207fd44aeeaa9560214d887623e271430b4c379d5c369190ae6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH1609655.