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 0x16baf1c25dddec471f2fdc64754f0e6e828fcac744e83451791a03a137d1bf15. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03005543-37af-4bef-9a74-be424d05a200.json and https://artists.proofprofile.net/proofs/artist/03005543-37af-4bef-9a74-be424d05a200.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 0xc8d9032121a87ba4eba55318c9da4647804e11313c66622eb5c73ab4a73fe38e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWU2407963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c6448bf81ad564f8276f006c8c9c9c638e7c00306f708dfd04307fe1d7751c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2498269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084d02e89a2c2a9f54f97baf98ebdd89d2a0011cdaea9715592b43ed831955d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6H2498270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf330d465733115253e68b8783d3802960b79352734f1feaf6747e8a1548132cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6H2498271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdb731db5626b65cb0437be0cfd2869e8da303f1d904f3f581cdee4db76c908. 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/QZTBE2393593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ee68fe34e78208c067a6ab9665645adf016a451d40c2e31876c09b695a088c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTBE2393594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7477ca24973dcb539bdfd52ce12f12d01431c585c85c1528fc6ed4f553f9bac2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBE2393596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb988b69cdcbaba93bb529f0ca2396a2c72dd6a8e448a77dca63ff02cf8f9239a. 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/QZTBE2393597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4af1a20d6e6856976257e77280305825063d87cbe16ba94b3b788c74feeecf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBE2393598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdd10e4f2626c398ba48922d5916fba62082feb658a1f13a77cc0120511ea02. 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/QZTBE2393599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384adba93311f0ab06c9e0fb31968a8b41c7dbfad16235e919ddd93537796a7c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZTBE2393600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403d6af57bfc25bb87b8a84a4116950352ef6b45138bf596266d52cf62009804. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:55Z), 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/QZTBE2393601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38244c2a705d726e6bbf62db9c14694ec1027fe6411a72bef4d3c1ff113be3b6. 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/QZTBE2393602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a56191b791418e62add932aedd726d572a291b2b641ab82b965734c3dabfa39. 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/QZTBE2393603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8d9c0d1f79cf68ca61d661959e19a308467442cd069d38f75f196cf14058f. 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/QZTBE2393604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f3b78fce7003e80cd5ab6ab8f5040b8962a46d48ad2893f07129e15648d5e8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTBE2393606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23335095c89d1d83a547d309fcfd874f16afbcf2a1125037369cc4f706dc9de2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTBE2393607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae4a23e0c3f57c73804f243cec6a7f4727772eca13b9e92277cee824064c538. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTBE2393609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a2bb0dd55d09ab5b3b8d50aaa7b13e7ea8b836ba0679b2b3f640d22244f149. 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/QZTBE2393610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5942d336ac0488d25ded273519b3712dcd500bdede63f739351d3a117d3a9a0. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QZTBE2393611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30a89cf3d8898d59fa8650cbb239fc8f08c760e0ab0102cff149b7f19efcdfd. 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/QZTBE2393612.