Roberto Perera (born 1952) is an Uruguayan jazz harpist, in the smooth jazz and fusion styles.Folk harp journal 1982 36-39 - Page 27 "Roberto Perera was born in 1952 in Montevideo, Uruguay. As a growi
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 0x794419df530a4a91dd08ade77e2f209d9823b36e9fe569729f07909cc99f16d1. 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/bdff5440-d0b0-4a28-9133-7bafe6a4ef3e.json and https://artists.proofprofile.net/proofs/artist/bdff5440-d0b0-4a28-9133-7bafe6a4ef3e.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 0x4b3c2644f8857cbc807acba03145e83768e5dd9796ec39f753c7b2e8eb96cc60. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:11:06Z), 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/USHU20401302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6359399c7e974c922e5fb083fa9a8870ac0f1e6e1c3bcdcee342a7597f68f2. 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/USHU20401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dfd8cad420e8f5f26b14b4872b333ea4098d80bd64e2b10ec4d30cc6577662. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHU20401304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5696e8effd5c1f4bc51b5ab7dfeaf8c2e1a6de6dc456af43ec322d5c8769a355. 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/USHU20401305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c613309453b910626072474f0fe5b192207a9253c8c650a83bec78dceff5acb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:20Z), 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/USHU20401306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc727ff6d51edb7657bb8eb03e2fc4458b9b5c978b75a8efbd516344e231bbb9. 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/USHU20401307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b7c5d05c8eca663cefaf07ec821fe41a591941d5259289680f63e9fec77a4a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:40Z), 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/USHU20401309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805484a330d7b60d6ef4bf2b00d15f8858b4b88b755a8b2377e11878fb4e4ea3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHU20401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aed9efb6832e5de9588aaab7cc4669df22cd839c2187d3e7f5075fb9f52070a. 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/USHU20401802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67c9f8f1ad495e01ef1a2b0b3d1a5080cc60f04fce10a20d4bd2ef28f79957b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USHU20403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29dfc6ad537422c11669bd858b150933291847422de052a73527022f26a39df. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:01:24Z), 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/USHU20403602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c6e5baefb0d2714f3e8b6230d1cb149a86ee2371d4a08227d8398a16a072c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USHU20404904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f91148c118e767c299fb343a897f77e37b5254ce54364beb9dd2ac975d059b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:10:53Z), 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/USHU20404907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa92ab44d8fd944b7e805ad197ad3d841ee24addb9bd6c2c2064e6d2375176b3. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USHU20404901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4371f6d4dbe0182392df91df7552d409310f6dac3c254911dfcdbed6d82dbe9e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USHU20404905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff39e096b8f1b6e9e2f494bacf3e6bb4ef79cddc7c178a0391bb8b7a8c7fe78e. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USHU20406602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93213decd9b4f0341f9a01775041b2b352a29bc9f35bc23275addfe6e00416d7. 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/USHU20406603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448a73472ddd28f5337e1bfb4e3da9727d5d0d59d3d4e1f45697ff06800a2b4b. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:17:19Z), 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/USHU20406607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6abd745871f843972915270c154ef72c9bf4bc5ba6a2d5687f959f82e7d511. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USHU20406609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee566843e2e77636152055427e3d4f26a2aa9c5ad2a6f61c8f948655de3ef3b8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:05:33Z), 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/USHU20406601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93213decd9b4f0341f9a01775041b2b352a29bc9f35bc23275addfe6e00416d7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:43Z), 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/USHU20406603.