Grêmio Recreativo Escola de Samba Unidos do Viradouro, or simply Viradouro or Unidos do Viradouro, is a samba school that competes in the Carnival city of Rio de Janeiro. It is located in the Barreto
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 0x74b47d5aaf596fb1ed3478c4f3d385945ae1544c4ccf84a57c30b8a788841ca5. 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/22804464-7a14-4f08-868a-60db7c3b1396.json and https://artists.proofprofile.net/proofs/artist/22804464-7a14-4f08-868a-60db7c3b1396.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 0x636ca49b338f62c18f25f78c7fe33277018b83f8d8852d7efebaaa624dd59024. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHZ42038554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629608665f8c1301e102b9322d16196bb1356cf6e04583d9c7f499ce56b52a18. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:41Z), 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/QZHZ42045884.
Uma Homenagem ao Teatro Brasileiro (2003) [Ao Vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a771a5c11591dbc99e2228491586d9864d24c436fc2c295350d691cbdf11a3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHZ42046403.
A Heroína das Sete Magias (1999) [Ao Vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97264c339ca5382e6e4e64ab04182acaa2918701332a894b6f04942fff74c4f9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHZ42046688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242cbcccb3810ce287746573be28111d92469732099813b5d3e9b1757fdbbde1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHZ42046579.
Sambas Históricos: Viradouro É Minha Paixão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a993a95b4dff4673f561b3a55df5b6eac3273db9dd95f1c4ec4f01ea819123. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/QZW9L2374500.
Trevas! Luz! a Explosão do Universo (1997)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713794c90dbf261c4b11279f5f3ac2b348c7683523e3858cef7c8b5fd5222e53. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZW9L2374501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d6effa4590fb30dae5a9e7b08be84e57e5cd3fb8df756ef32d07375413b989. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9L2374502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029118961b8dbed99157b0a49f16fa6aa9d7546be04f71cfe8a86ec1252aa0af. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZW9L2374504.
O Alabê de Jerusalém: A Saga de Ogundana (2016)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4500175d2f88a74ece0db1163b38e180448bcf5de0624d458047b4cedf71471c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9L2374506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868cfe2265921d57634b737e13493c2c818c3e0c2b9da27f54a44d1f2606ae8e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZW9L2374507.
Glossário Musical - Pontos de Malunguinho
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ecfdb2e7cd3f8c98cc2341498e8c8005db2267312229499b65a4f82e6bbe21. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:47:55Z), 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/QZNJW2496828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c18a0bd6e450936bf6074c959b8a7bdba1fb94d22eed38c07f54c0aa9288eb4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNJW2496829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a3dddcedb0206f15d9d989fd34f3d4dcab4ea318ac8afe9f6ecebc16b00101. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:11Z), 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/QZNJW2496830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a34ce0bfb3869db319a4b6457747fbf7640217a0e09719d6c98ba4fcc4fcd2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:30:46Z), 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/QZNJW2496834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c54cfe57aa1ee3d334065a4969cce78add51082187aba24e7df32c1417bac81. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJW2496835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6425c658de94af0363f3a1095fb07cfddbe41183aab6d4588aaa09b529f6d345. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNJW2496836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecca41ec0beec77927287874a5bdfc356ca68fe4686b07e067251b539791c01. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJW2496837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed099abd39c0858be42542470d3ee17fe3456ddfd25b93e2c1e8655f0c0c1763. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:47Z), 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/QZNJW2496838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c71063df7ae7415cde3af52867e1e62179598e9c654774dde8c271afff4fba. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNJW2496840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ebcad3b596f7eb0d6cdcf1a7f42b65c46dc0ae301b5439152ea3c8d9115eb6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJW2496841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdc626292f63332888289d5eeb7768aaa3def54b8589bcf1c6ad00debd1ad82. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJW2496842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee6dca06b907aefb599e4565f2aec353cef984bd130249efe5bf3ba51ac7dc4. 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/BRGES2200006.