Barré is a surname, and may refer to: Adhémar Barré de Saint-Venant, (1797–1886), French mathematician and mechanician Adriana Barré (born 1995), Ecuadorian footballer Alexandra Barré (born 1958),
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 0x253d61333c5d79fadfbc70fe8bb0d776a8b274a474abb63cde4bb7d3e832c3c3. 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/a44f4a82-fac8-4519-b2bb-d81e42941bfd.json and https://artists.proofprofile.net/proofs/artist/a44f4a82-fac8-4519-b2bb-d81e42941bfd.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 0xed4568445a6e515a2b39384462002ce33a6d6c8c72273d3e5a1026f20256a671. 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/DEXN32300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb873238ca5c2392e7721b0e74e6506ec7438f14608286a865a8ad022feb153. 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/DEQ322400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b3d4f5540bc33859b84f840440f3dcf4f14391d2c802ff9139098a320d7bd0. 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/DEQ322400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf9ef3f8d989f6b54657e572bbab7eb86f2c3bc9acb44475d71fb1eb5731556. 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/DEQ322400576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ae930ffa660fb08c290aec7d0891f1f317c916127935643947581acbf2e4a0. 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/DEQ322400581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930bae70dbf16353b185efab56890ae83006231ef256c023d43c4a8f386aa289. 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/DEQ322400575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52cf7807334b2a8d2bf9e26af4f7264a8da9e72c61fe0bcfac5554a0c988323. 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/DEQ322400577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d321411ea3cb60a475f5f2012f31b23d682e67edc504ae051a1282485f4006. 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/DEQ322400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78549db7df03b53ed1f4986576e59ad4afc64349b7a8d9fca67238e61aab3d33. 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/DEQ322400531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4568445a6e515a2b39384462002ce33a6d6c8c72273d3e5a1026f20256a671. 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/DEXN32300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668817a068315c28f3984f2d7d6362aeffb238d44ff43f2c3cc69d7a2e21b907. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEZC62382949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa878ebfca3a90354a80d8024c92c03d38d9631b9a62d4450fab4cd7f82da0e. 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/CH7812241157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaf3f491d41d9e55502e7fd07c248fb68adbe5b5e6fe8a1baaae68c0be68e2d. 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/DEQ322300475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1d4c9772b677e5ec0308cbdb99f3148ec6ba51e59be87a8b227ddeddc6cc55. 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/DEQ322300588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaf3f491d41d9e55502e7fd07c248fb68adbe5b5e6fe8a1baaae68c0be68e2d. 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/DEQ322300475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaf3f491d41d9e55502e7fd07c248fb68adbe5b5e6fe8a1baaae68c0be68e2d. 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/DEQ322300475.