Nico Assumpção (Antônio Álvaro Assumpção Neto) (August 13, 1954 – January 20, 2001), was a Brazilian bass player. Biography He was born Antônio Álvaro Assumpção Neto in São Paulo, Brazil, in 1954. H
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 0xc70403f509ff944de9dd2267ea892d94b7e2364b92f08ebf4c468e06f117ea43. 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/4889ddd6-c0dc-4336-b537-c5b498f32493.json and https://artists.proofprofile.net/proofs/artist/4889ddd6-c0dc-4336-b537-c5b498f32493.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Projeto Memoria Brasileira : Viva Garoto
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 0xd46def08934548c4b637b2e74e09fabf3216c6c98d83c11bf54fcf94c0145950. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR6V81766633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb961ed6a44e96bd4d07c3f75599ccfcdacd633c54cb46eb0fd2a1e77f5a7a. 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/QZTPX2121382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced92af513f4bc2fa0bb4996c2178276a630c1ae3f8b5c91d99728c2aeedfa22. 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/BRVSN0300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ec42b912e79790e53e031cd8106ddf30d7eaa8fa6208aa18bd91638ea4541a. 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/BRGMS0700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e6d3ebf5279c85f4a37562fa677ea862210a745a0f768123622b80c78041d5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTPX2121378.
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 0xa46d7d7e5643ef16d2f3cc3c48e2ed8740d148140f05585b80c30b922c7a167a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTPX2121379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f0cb950c0fc4da8e082b44cc0d53e8b595297a1e14fc4fd2219668d11c071e. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZTPX2121380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900c6623b2b99026f1ee400521f9f2274b272b53e268f30a10d10ed885406eba. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZTPX2121381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13feb71d4af0d2f7b0d259bdb731fa21760af7eb12370f58fef7cbcfcef00914. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTPX2121383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0060c1472dcd4d9ef40a9a6b522d6212db2d69917d6589ebe6684db3c1a2db7. 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/QZTPX2121384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef84c64fef35d85f13f8b5be1e996809db19c03aa4e097b2e544fc596864933a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRVSN0300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf98132638329660a12d59a5e31f281d58d68581cb7db865ec066fb2af31293a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BRVSN0300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc3724a18bade8a7583d57875948fd5984911529c989c18661b44a593f4dd2a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BRVSN0300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd812b452e6f74a061c8a65d95aaf471a2e97405b71779c1334feff477fae7376. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRVSN0300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38774ad832714700ab06aadc23052714690be1d85091f5783b387ed4259fa77. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BRIMU1100013.