Plínio Marcos de Barros (29 September 1935 — 19 November 1999) was a Brazilian writer, actor, journalist and playwright, author of several stage plays adapted into film. Called a "Poète maudit" by som
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 0xc2c15a16ae5f1de32f9126d4f7cb070b88e6d33a4927644437d1ec8207e1e5f4. Chain 2 (Bitcoin): anchored in block 953999 (2026-06-16T20:20:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31401a7b-13df-496b-bfe8-9bfe7f1048fe.json and https://artists.proofprofile.net/proofs/artist/31401a7b-13df-496b-bfe8-9bfe7f1048fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Plínio Marcos em Prosa e Samba - Nas Quebradas do Mundaréu
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 0x0caa096f8f133b737de3f8a1cd82af94b55bc4817bdd706ced3795aabe8f4d83. 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/BRWMB1100693.
Vou sambar n'outro lugar (Terreiro da escola)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947912220f27b00ba4332c218d4457256e7ed9c4340f3740b41955e72a4e3e68. 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/BRWMB1100694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb181cad534ef6372ecf4112a9f78463b2522ff678d5d87f2e3499fbc8944c3e. 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/BRWMB1100695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f6e818a44d510511a91650b7daa5da6386685f3545df240b574b315139622. 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/BRWMB1100696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e87cca30127e58034069b45ec8544075036864e9b27539557cc8709ac84eaa0. 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/BRWMB1100697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b58213c6d9136e5f80d9479b8571802362fa8075722c58900b7d4387c4b3b1. 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/BRWMB1100698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e592c4a67935ccb9e5b0077c95677768f62b15d59445ec56677ff690d47b82. 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/BRWMB1100705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878f3deb0ec8bc74014901bd222821dcbfa8215aa59416d82a74b54399bc3c74. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BRWMB1100699.
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 0xa50031e863a49f1544b34049a889970b213d4043c3fbfa31b6b63148b9fb25b3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRWMB1100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f94e3694cd7fc8f94deee5b7a74b963a2cffeeda218c2e389e72e3a0c8b595. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRWMB1100702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58347cd4b82572ade527d5084bc70ac7b40fff376bd2612842db7685c2aaf9b6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRWMB1100703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89586eb74e765dabe018c7f04b27db3a5c1ba5d636c19afa8d4a312fa7a4b540. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRWMB1100704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c188974cb8b3f5d93b08fc8bb38b691faf4d02c93593bc8e0c2dd9e2814d07c. 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/BRWMB1800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c774207f49d40797785224091cce5236514f594d8faeb065ba11622899a2080. 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/BRWMB9702931.