Matthew Barber may refer to: Matthew Barber (singer-songwriter) (born 1977), Canadian singer-songwriter Matthew Barber (politician) (born 1981), British politician Matt Barber (actor) (born 1983),
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 0xc89983290837637c2402c702b4b5643a183d8c15e209598f7a5a83a28efa3c2a. 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/1281743b-bd7d-40ab-a05b-d4de002813e2.json and https://artists.proofprofile.net/proofs/artist/1281743b-bd7d-40ab-a05b-d4de002813e2.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 0x7a1379602742c23f29001d444e84d0f302704d97f7e539edb3d5375bc7a14aa5. 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/CAO370803702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3ad68721db2d608d33ed329d5987c34793a4c40427ee73dbb6220f7187450f. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CAO370803703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe790e76037b09e8ab637c9407cd970cd775c946555a4fb4d536918b7302c4a. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/CAO370803706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e2f9e6b728591acf0e09c3f7cae01f9e268af32ee4f6c175e60d51b2e59756. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CAO370803709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d8bfc3152107acd5b266aa668f0e200e43ceb2c882b6c1caff1b9bf3e1f223. 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/CAO371005601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c4b060a02bebdda8dac132f875b72d8152d31bf7bd4d7105b6965472cfe76e. 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/CAO371005602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d6a8700a92f2bdbff38ae26e90a6c28d4d7364008d13ab908af6ce6a7ff6fc. 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/CAO371005603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41af2814e47a1dfc04c6ecc861eb093ec4f70ef3ca32ce9c81a81e9acc98091e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CAO371005606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe414f2a97aadc2c1530e731b47e25c083f269fdecd7f7f87be377a8eba16266f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAO371005610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b79deb112d09f91885f993951dfcd06cd09c749cd50a5c1e82e7bb03a800e6b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CAO371005611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefb88984876eb49fa3a58a1625af3feea8a6fbff8cd183c521c2362ae3161aa. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CAO371107508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e85e74d27fc9307ec23b9fecf1a8876dd803508cef52281fc04112625b1ed5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAO371610106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f1f7b1e1a169be1b89914e2b38141d5b82dbf2ac05fabb9fc35b6343d8e6ea. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CAO371610107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d68f2576a38a00a855507a7ffa0670244c57b40e9d04cdf7ed454eecf229f4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAO371610109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4d235083497ee4a48ba8dac3dd6e09eb38adb45dbbd0b6c8a3d638f03e13b0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CAO371711601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5ef6a86fb1178e8277257c62d885e9407167cd8415948aabf136f2ad3d6d44. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CAO371711603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe199685e2b61b3ec4937dcf9a091129febb9a68772bc6e5180bd51342857dd4f. 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/CAO371711610.
Songs From The Gang - A Celebration Of Joel Plaskett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3168918d31511063ea226dd6682c4bfd55739775adcd6f463dade7769c014de3. 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/CAT222480175.