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 0xbf597ce0581c0851451dc8f9a6983d213c4e3abe80217768ff62792f6013c868. 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/11a145f2-d818-4aa9-81bb-c48bf42901d6.json and https://artists.proofprofile.net/proofs/artist/11a145f2-d818-4aa9-81bb-c48bf42901d6.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 0x981ad46e0781f34c3c25ae3736f77f753224210818fcf27a3c315fe54dfcd31c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBCWU0601882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03be17692609dc08f7b67cd41c10c3ebf9eca94a42a6aa9afb6a60d890ee4c12. 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/GBCWU0601885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a376b1c0b8217c14f4c3198aca187f8c65545e8f5d7f19d012fed90661ab81a. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBCWU0602139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70f5573e9927a7de5e05a4b43fbec4ac27766ef2a14b843b1bf41a71c1209e2. 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/GBXDB0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5e9ea24e46425254382e49f6b91dab5dff858ce42c3402af7c27d05773d65. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBXDB0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbda86f433a0bf27dc49931c17d690521fe62fc7045c3b9a7bdd87e2cfc6fb4. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBXDB0800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093f87d1ce069e0eecd972fc7f5643a4d00c7b722f5ab3b8ab2e52ea4cc99804. 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/CH9141100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4098a5c5695c8b1478fae383a397c851402b7a03066b8168385d58c0f288f18c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH9141100010.
Alex Wilson Interview with LondonJazzNews
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c84ca960640ebdcae2e9842ff0aa8078380964aae27defbeb1c307a7d58a85. 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/UK8D41426532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b2ee632e32023d1d84b146a897ebea0b82bde3a948c9ba685e229f820834c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBFT0400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7e26e65ffc42cdd715320a414a1155137f35e1e414a70eccc749728edb1f90. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CHB772200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d950796639655f4d5fbdc95a8efee6cc2192f7f573ca574b2b8ab3d668e731. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CHB772200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ffd4e9eff6f68c238428b4ffdc67952f7a382db421668155f6bb534bc68adc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CHB772200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb6ba19142582df199e3c544b6cff3794cc3e7a329b537a883006c3ea73dcc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CHB772200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab005afa5284c7bd0d3ba6fa4a5d76534e6dc1c1180bf35eaaeb4b4ea7a89e2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CHB772200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a383cc05c23349a1cb43cd71b94239c340f351d08ba63c62e000eddb15f99a4. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CHB772200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c10149c65f231d2802fc81d0bff56b1dbae0ce48617e674bee015db6e09a72. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CHB772200046.