Aldir Blanc Mendes (2 September 1946 – 4 May 2020) was a Brazilian author of crônicas (journalistic vignettes, chronicles) and lyricist. He co-composed many songs with singer-songwriter João Bosco, gu
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 0x2acd507c8667dde7675261d1141cfde29de7ae2f4600fa33244ea3cd1d872371. 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/8652a482-e643-4845-bb74-764a758d26a8.json and https://artists.proofprofile.net/proofs/artist/8652a482-e643-4845-bb74-764a758d26a8.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 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 0x4b542e684908e4b76d139dfe1d942c7e26a64362e08275299511495364de01ba. 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/BRECI0500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5476a85ee079990b9567948d830e98b0e8f069699e9fea941b7e35048bd0ea03. 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/BRECI0500298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe968c65dc15a152497e73836eee1939c13220cde7fcc15aefcfa153e64919a5b. 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/BRECI0500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3877dbda801b7c6889b863bbfd02cdac18e5133dad04d8dc69301e46b6160417. 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/BRECI0500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b9963c7db028b478e366b26eb89a9cc21ad1c3aa049eccaf2bb669ac24f09a. 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/BRECI0500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282109e54bd20cd316ab801b2b016128aa9911876197f7ebc4e9faf8efcca101. 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/BRECI0500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c1a8796cd4a47d91af402d494dc58944dc7f87df1c71c45bd390eff0df05bb. 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/BRECI0500296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e78f4739a93d9823eb1fa8300b2864334e3f8c5910482b5d9c3ff12635b73. 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/BRECI0500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb5d9c53393846e77fc57d6e5c4a92031243616bc3dbfd0186c9d24fc0c0ba2. 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/BRECI0500299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade526f3cfcab358e7e2a79bfb7008154fe3630a58cab32a9a19bae5fbce7db6. 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/BRECI0500307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449a7b07dbc471d53901d0c4dfb7d65f3fe4a6a8bc43b9dc7e8fd3de99c593aa. 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/BRECI0500304.
Aldir Blanc & Maurício Tapajós - Volume 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120ec53b2b4f36dfea0c3d4555a98a8143c13042b2d8bb98917ceecafcdf422c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BC0UO2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b4daa526df7726e6c05e094a4afb1f88d46611013c578d2dca2aae2e054cb5. 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/BC0UO2200013.
Aldir Blanc & Maurício Tapajós - Volume 01
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999403d1428a669eb5545db1c3d67de097c3f41eefa9258ae0509d3c32c8da41. 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/BC0UO2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46fff08422fe235982b870394341cabbad4abd0c6d55b2f016a88b4473cff75. 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/BRBMG7300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1488487f6bb7f78ac58ee0b44c40242ecbbf3b6cf335e7f683676ef140d090. 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/BRBMG7300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0aa8be8e6706628bb9c45633fda3fb1a35e92f30f5cc6f2dac4a187dc94a59. 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/BRBMG7500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f990f9981bccf0781f8c7af4f7c6dbb4c56f72769c9365f465aa7c79b9467f4. 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/BRBMG7600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369dbebb7cc5dff88a708525add1a14c660fc2b1a3701ba55c01caf5809deed1. 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/BRBMG7500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4bfd2ef24de32995a81546f53b8db66aaa29cac65c31693a3566975dbbe16f. 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/BRBMG7300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24cfde7959fa0b1f4071d1a3f8557cdd161b38822feccbc8f29ddd7006a6ccc. 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/BRBMG7500028.