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 0x4d29864d67283b73fdd5d0377456adb698c7e73eef86e6f0d390162fe33a0789. 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/ac55d6bc-33d9-4edb-9874-189eeb4510d8.json and https://artists.proofprofile.net/proofs/artist/ac55d6bc-33d9-4edb-9874-189eeb4510d8.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 0xdcee250cb955894a05bf8a022047b8c987f58f5450448e3f5c7161ed70404b6d. 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/TCADH1767749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e6a050ea9a17e67fcfadfe3680627069030753278bcdf507e0158e7061ebd. 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/TCACM1651085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b765e52b136b4df79db8ab71469968b9cab3b26c9bb2d13e4957192bb5a239. 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/TCACM1643070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd072fa3f68d3e42a56c841402bca4fe71299e8bdc1544b7a8f3879b467fa392. 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/TCACM1643156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2011915dcc9e6af65ad8c96927c3ddeaf38013406a2d9ad2f280f705e042d38. 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/TCACM1643157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bfb394b145c73a6bccc43a3891171d63bb48b64d3fb759fb5863a92b3d2107. 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/TCACM1634114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1ec6ec658f3411e4bcacaa9c4f216ec61c0701468e7f620bd882893f8b03b4. 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/TCACM1634491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ac673b7c23e30987fba5f82deefe7f6157337f0960e2d29dcedd2f3df44729. 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/TCACM1634573.
Contemporary Igbo Worship & Hymns, Pt. 2
Contemporary Igbo Worship & Hymns, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d27a2057c4dde248f19942371c5b05918b128cd4a8e6909824f5860529dc1d. 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/TCAHQ2370143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230bde1cde6d614ee7bc54be3d88663c11f33d003ef37716443b8634c8b56081. 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/QZ5FN2231811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42954b5c6e219cd40f58a50f18d66e1eab54f0ea6f9fcdd7090103c4fa8feeb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBWUL2153364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe848adb76df64ec19e310ae344f3d8c923ea29e58f66fc3f74315d52a99e5bff. 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/TCAFJ2126347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecb500324ba863b47893cf4cee1c2d5a339cd3480a9f88191910161bc261f4f. 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/QZMZ92041128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6973303d77453b9de96a5a09f9b9ab145d8d9b1b7d78e3461a3eeb8652b512. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAED1992065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f30a760ee912c7fe45fd92e773c101355f98e61de10a07e09296903398edbcc. 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/TCADU1809794.