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 0xdd8b3759d46e1bea3d99f20b4b32de32c7db7086974e6ad17193c879d4e3a26e. 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/b0e0418d-f5da-4312-bc3d-aff5fa81d525.json and https://artists.proofprofile.net/proofs/artist/b0e0418d-f5da-4312-bc3d-aff5fa81d525.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 0x99dbfe32d6908229f64524197d70822b025be3510281df94afe17f5281c2fa1c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABO1300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6577055d1e1c24572ba48b7026e33641f8ce077cef715b1c6cbc2e9ba61a1f1c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/TCABO1300538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bfd733047091f62abf5cfab81c82527490572c7ac26eb727b9843e52da20b7. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCACK1536745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347cb8588503dc50db2ee5e848aeac165ea1d92216916e93b307dbd5bdba87d8. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/TCAFY2118374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898ff3cb952dae7b5efa611591c258162438de8b7cac71065e7428a9b8d49156. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAFY2118391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bcbf0d9406307e25af7a1a777d235f0b1521ced74d181695480e94a088d62e. 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/TCAFY2118421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ccd9c7674b35a8464f7b7e9894b19bf1127331bb6fbdb6ccfbfa76676e5715. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHS2346914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2723f25bbf1edc39655d6e485cc73310b078804520eeb548365545336be727d0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJH2506611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebf0b9d0595c6cf97ce47d9364c3c39e446cb172cf4f5a747baa35206742a74. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAJQ2510913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b68466b0e39a35ab087d9340e63df61fe4c02239e14ae8b3330bed85b7b360f. 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/TCAKA2528933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe244000ff6089368c5ba5e384d61d5178c0ebf65e9bd31abc444f27b6ca51f0a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT65Y2581402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae67471ea5146ab2d2af1732ad997fefadac455f8d5cc0f23893fcbb7b985863. 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/TCAFT2172554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3b72e6202c35964ee24b0eaf153de2baa622b54aba76b84346f34b7f165faf. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZS7J2202478.
Tilibobo [Feat. Mag44, Solomon Plate] - Live From Lusaka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4a4f49da2f9be86701395274128eb46ecc2d5a77bda34701fea103cac5309d. 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/USC4R2333129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6aa963328072b4fdfb63f650c654788b8695143a089b8a9fdcbc1c97984f7d5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFYW2080382.