thumb|right|220px|The band live at Rio de Janeiro. Blind Pigs (also known as Porcos Cegos) is a punk rock band formed in 1993 in the city of Barueri, SP, Brazil, mainly influenced by Forgotten Rebels,
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 0x96b241baab80cd1b3672ac9d3b69fbc0c509993a815cbc0df122c4b00f3c0d05. 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/5354b304-1211-4194-9a9a-2534120ff00e.json and https://artists.proofprofile.net/proofs/artist/5354b304-1211-4194-9a9a-2534120ff00e.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 0x2eabbbc069622e2003716cb58805fdf01c608c59acc08160cc93db72c1f58a1b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US7VG1473729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ca2eebe077f06a5d2ad5239f61b2dc035f6a89ca4d665fc85f00a1d9e45c58. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG1473877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa066cb7c336ab227aedabfffe75e784a9c82eae1278170863516113f5ae2fc. 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/US7VG1473926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cd038fdd58a64b00078332929d9cc8dac6807f963730bdb3f9f6e23cd5608f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG1473927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42779f0871f3ba8b2d3e8b08c9875e0f990a64f52f8b99b11967c67d47cd923d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US7VG1473928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85202353f5f97d53ce9e6dbe477a5e54077d31bdb8155273d0079d383ed00d03. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/US7VG1473931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93c6c3d70bc7d2f5ad96c25146d5655ba0f402e8f9d14dda418346b16352214. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/US7VG1473932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1db8c3e83a83b1427c35aeb2dbfa882c0aad3adc418bf5c6e819b8bc9a865c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US7VG1473936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea30e8c1abceea868d1a5db5c3af8b17e655dc324d436283dae65b14dca13339. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US7VG1474095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46ad14bf2c506c137c0ce77273fbec94ed8de084f1094926a83f84f6eec4e10. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/US7VG1474584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8824e6ff71946fc77ec3dda923fb5e9e98773ac5c7b4abb03c2d0f70ea639bd. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/US7VG1474591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3977fc44a061165f6de6ed1787472e201731a133b2a10fcd7f9534afe95e55e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRMZ72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3977fc44a061165f6de6ed1787472e201731a133b2a10fcd7f9534afe95e55e2. 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/BRMZ72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a528b2aae826109bd44c839f4ad2b8f216382fe09541bde539f455b5d13116. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:37Z), 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/BRMZ72400006.
Heróis ou Rebeldes (20th Anniversary Edition)
Para Incomodar - (20th Anniversary Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43d4a80422642a106ccecb04953ffb462a2bce19f964d75746956c7db4c6e17. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT5M42540651.
Não Vou Parar de Lutar - (20th Anniversary Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87acd149af2e0671e2258831fcdb0d19cb32cc87d2f3b110c3a31be713e44328. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QT5M42558554.
Curso de Liderança - (20th Anniversary Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6795c59faa3285d195bc9bb401f5433e1be0542d15cf726a06bef152c7f28d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT5M42502891.
Tediosa Sobriedade - (20th Anniversary Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da36402351cdaaa1a66080f368f279ef6f18b500e622a15bd2cc97304eb2a84. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:10:09Z), 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/QT5M42520709.
Plano de Governo - (20th Anniversary Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f46af696827997b0774bd2980d61460e41eee767f516c4dba679ae8064f74d4. 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/QT5M42596951.
Aos Bandeirantes - (20th Anniversary Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3d623ea325bfad7f28fe4be26cfaeab77aa5e6d499b2dce92bfc9a1c7e3438. 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/QT5M42528246.
Heróis ou Rebeldes - (20th Anniversary Remaster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ea73bef93b3b794ec5c84334938449463d01806e00a5154811e1c8fb6eec4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QT5M42514034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87a633b61f1ebc10d021cd5c055e6cb739fced51deea290adbb7cbc5028b0f7. 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/BRDEP0200294.