Barretta is a surname. Notable people with the surname include: Bill Barretta (born 1964), American performer Gene Barretta (born 1960), American author, illustrator, animator, and character designer
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 0x900e699524595a0b7f18386d5478e2396933696a22d76cc19eb16b53ff3403d5. 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/dacddb1c-7aaf-4b19-8047-07fce3818be0.json and https://artists.proofprofile.net/proofs/artist/dacddb1c-7aaf-4b19-8047-07fce3818be0.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 0x012e6175a2f8daf40c147215f842732dbd8662984c258820622304f2d865eff7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEV2104245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9db1270d027847ece72539d002bc19da3cd595fe749b03de67d979361e1006. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:32Z), 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/QZMEV2104246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccc465753441a33c41f7203739c1a6fa915f375792ff726fc9aa61a7eebbaf4. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:22:37Z), 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/QZMEV2104247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76fba61a01c1fe712be0a58ecee5ef5f9b235cce3ae6c94a1735a6dc59b6c5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:03Z), 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/QZMEV2104248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439024319a97fa5de327d5a16fbb5ff898a0e4f0722ce39fd753e44898a4b471. 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/QZMEV2104249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d06387582a6daf0a9a7433a5e45d1ec2db2956b58af0967c4850758c5856cc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:09:54Z), 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/QZMEV2104250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963c553169bd5cdbdc37f21ab3575affdb84d9e13f5cb73d9a6ce8fefb4c7d0a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMEV2104251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8e9ae5307019f63a4db05b485a6e265ef1fc659dd18f50ec42f83ac0d46526. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZMEV2104252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261260f6f3e62766c0c502f34dfd13029d8f93b5ae1091a0253c85a43d4c58fe. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:57Z), 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/QZES52361391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecd299d41316e42a6d60bc20b3e1e3c94bd4ea6938225419efedf486c3d2409. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:39:51Z), 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/QZHN82358772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f20127e80327a93780e15ea6c463ed7b187de9cdd04764aa96f8de41e4c953. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/QZK6Q2358198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd644d2ac046e1dc97572e727ccf6d1d1509f9e6b14988915e2311436809ea97c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:34Z), 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/QZMEQ2334065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6816104727ba9063db48ba7427a60b8b44525667fde57f57554a61a3fbf3b12. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWZ2347911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7f99aa2ebad8d2fea0b235efe749bd3ef73aa153c9dc377b1c86556d83e1b0. 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/QZDA52361922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49aa2003b36f28e8ba6a8e29e6b97d9c3e1abc66c16a1794d88271546562e53. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZTAT2317394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe111863c4621b69af39aff2be03155a79b56bdbede8661bfb7288068290a5109. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFL2338332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0445af963f8a3ecd2cc7a6b2f6d5af77d99f7895762cd0d6dbdb3fd851acee14. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNB82484204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9c85d1453e579ce3ade8330ad0974e9a84a6c86980d1e9634a31c24b953b10. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNB82484205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7824e7fbca93c2a2559ffcd1344d07576042d64381678fd78d2867f0643bb551. 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/QZNMT2400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37b0d68e5bd1c59d189297d5d2116440aa9875b9a515aa584b86aa3f58c2a5c. 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/QZTAW2452328.