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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60ec17e7bd669fe157acd04db7c85da0e8f2894a672d335581f192d6413250f. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44ae2b73-2ca5-4b7e-b9ed-dc10d4cb06c9.json and https://artists.proofprofile.net/proofs/artist/44ae2b73-2ca5-4b7e-b9ed-dc10d4cb06c9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70546fe13877d12ca340e7ffecdf4e5668728def851fed3601957120daf67045. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/BK4DA2506160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c845527e3032b0bc4261f2b534707538960f64a400d18aa6ae7d6134f16d271. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:26Z), 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/MXF172528008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c2e74f64fd84a88cc964f5652f0c2de86e3e913e36982db560b269dbffe047. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MXF172528097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7007238cf061d7db40ca782a5ccdcc88b5c14b1177b30867a234ecc4da26111b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/MXF172528132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1375db91438f183795505a636c969c3d40096b245be46859f6780fbdf39f3e95. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/MXF172528131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c845527e3032b0bc4261f2b534707538960f64a400d18aa6ae7d6134f16d271. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/MXF172528008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e0a2b754339c9cffb603cfe56db89b6cbef0dca0cd9001a5d557efb6448cca. 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/MXF172528137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c2e74f64fd84a88cc964f5652f0c2de86e3e913e36982db560b269dbffe047. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF172528097.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6525cef258de37ecf14ff3ece2e3c8a50e3cec510df0bdb28fe98480b4537d4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/MXF172528140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd59bc7426a391211e5892e48bb6b2be39eeb716dd89723d0ac2392bbd9bdbe5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF172528141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9a3d28651b70febf36036daf1816d27da7759cb8e7c4f67e2130a42fa82105. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MXF172528142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc473c898ff5ae0defe529ce6933b2eca552965305430628e18af650b45e3760f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:33Z), 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/MXF172528390.