thumb|right|250px|Chico César Chico César (born January 26, 1964, in Catolé do Rocha, Paraíba, Brazil) is a Brazilian singer, poet, composer and songwriter. Early years and career Born in Catolé do R
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 0x0f08be9a67c9c96ad684deb3750078ab4fcc4e13bbb21df546d24d008c0a5a3d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/619caddc-b8b1-45c0-9125-330f5bb2ab24.json and https://artists.proofprofile.net/proofs/artist/619caddc-b8b1-45c0-9125-330f5bb2ab24.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cantos e Encontros de Uns Tempos Pra Cá (Deluxe) [Ao Vivo]
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 0x2f9e575bdc258ccfc918506bbd070062244c05800986b6eeafe453c7054f5d6f. 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/BRPUI2100108.
Enxerto Poético de Cantáteis-Cantos Elegíacos de Amozade / Moer Cana - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd77f3ef626e90bdef40fd2d0f0fafc1cdf8b1e592d7e6b964e11b07a2d4b0b. 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/BRPUI2100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c71462623e71cca4d898c1a7e578c53400cc8ebce48f404db024c09188c2ee. 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/BRPUI2100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2686c0513620a4120d30c1d5d518920bc8ae201e692f2d7a7c38edccb5afcc7a. 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/BRPUI2100119.
Desejo e Necessidades (Faixa Bônus) - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a1325fed18bae9b721a96314463a5c06bf9abe5a660d6967e7bdfe35aff37a. 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/BRPUI2100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec7c2abf1f2d4e85f7fc6a763166e5de4eae8101bd01d8c636451b710acff68. 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/BRPUI2100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea99f61ecd8549d9f0b71d3d83f433e029bc611473ca5629159a5a5731d93378. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRPUI2100107.
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 0x640c2a9ad05c45c8827a920991a4a0ae64cfb2b0756a9d0c325a044397ec66bc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRPUI2100109.
Por Que Você Não Vem Morar Comigo? / Citação: Queixa - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bea542d540ef2bcd78851763a555c956a47d21d66e3d74bf8686c50101e7c2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRPUI2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1e93d23c6e8f86e8090d400b61366e67f4db408cbf570755e620fa34f767a5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPUI2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5419e7222a59a609e582c801597e22656535c9aa0283dd38085a6e83ff86f459. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/BRPUI2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c420ae449d1dc25162a2c5cf6945b28c236a4780f87c87edf166e4c9f617c3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BRPUI2100113.
A Prosa Impúrpura do Caiacó / Asa Branca - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191faa2c4dfe01616d7d81dbf457a5b9c7de0feabf76361fa3ecc44badf9edde. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BRPUI2100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec6d0f18be7b6364eda98b10d50e0e0809b6df3b4f843331a9ee350cde69e4b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPUI2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d552cd439a319fcb1bbd6ff54afcbadda0d2e1a30f41492e0ec351d49f90feb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRPUI2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1619372657d222ad39a546cd611498b2a9a4b7831c5071ec84cf0d500df4313. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BRPUI2100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fdca1d42cde4ec08488ddcb277f3cbcce166ab85b15b8eebc5feca55a35e43. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPUI2100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ec58e5cc6781e803dbcd72f3cc598162ef36cb03ddbdf2ac7b15f50afd79fe. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BRPUI2100124.
Outono Aqui (autumn Leaves - Les Feuilles Mortes) (Faixa Bônus) - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b3db88048878c1f3daa21e301b8dbaf9c156c4f0e83be9c64918b176aec706. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRPUI2100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34c0596a2698e698e3a92bb380109926394bbaabd0e29497f547068a196e8ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPUI2100123.
Filme Triste - Ao Vivo No Rio De Janeiro / 2001
Um Barzinho, Um Violão Ao Vivo (Ao Vivo No Rio De Janeiro / 2001 / Vol. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60542b660c13d602fda14ef974741364aa39da1ff939d0797326bae7a3bab971. 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/BRMCA0100573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbd8465fcb1614f8e14a44df93d4d29c33b2f3df096753400348ae27d88001d. 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/BRX6F1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d072d4332ecb3882446e17713178a1ed5f6d57c31c662291d310ea7555af89. 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/BXSVC2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe137c4be9479fd96de8bed82fe548a3348136796d96d8e023271542dec51d0c1. 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/BRELD0200451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeb976aa724ca8d2c4ec3005cce5244c7bd6f08adddc565c58a9ac32f22790b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BXA8C1700007.