1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xfe1db5461c5a243bef36b020b177a41e4f437761a3f4f8484feef8e89102a2a3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5418a26-a27e-45b4-b132-54020ffbe4b3.json and https://artists.proofprofile.net/proofs/artist/d5418a26-a27e-45b4-b132-54020ffbe4b3.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 → block OTSBitcoinBlock must exist at that height 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 0x10ed617690033618518d760eb541ab9399f50526862a201a36a82188a301aae6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA42397791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ffb09d16f2ed8ec6d7605c16da9a4a76acf0928fada543d302161f31ad1152. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZDA42397793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18be2db9db45e8c4b13c2da451bca6fb6a71a1ddcb1129e9d21d35841ab3a8ed. 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/QZDA42397794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e149c632a05412a4f71f8618ca1007ce6c8751aa0f9e716b3647161a36b642. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHNA2306276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c6977993a8aad5ad1e4bb020b65f40b6715e31f64cf34dc866098e4f3fd491. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZHNA2306278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347d04e99c0d6c70551a76d2006165f9333cd0b7c833b1810be83072a877d545. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6N2391729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448b912cb11d9ecb30c17baabb3a3ed2fe7744b9bc398383dff6da6d5ad6bd72. 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/QZK6N2391732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7133840dabf29147539e156ab6a2a23cd8c7fd95e8367736cfe3e4738f175c3f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6J2347542.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa33a1b128778607e1d1aa3ce3fc54c8c0bc1877ea88d8c824aeebd155a45a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA42462175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ccbe295e049c0ed670773696ca1551fd119978a78d0508032fe297cc3ea7bd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/VNA092401612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb5647fa47b93fba0233ae7eb500110498854318f5dc51af459a13244197ae9. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZZ772430474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd53372968eb9e37a0b3361c5673f30082223de68f8961a2cbb1314476bcd155. 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/QZZ772430490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143259a0f573d16031e1d8d7961604dfceff74e6a9b5962952d3575e5fd07942. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ772430491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dade13519f43e3d82cb1f19f530761f7a6c986b514586b9ddd463ef5019702. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZZ772430492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf6a76df2fd45842e5a76c549f1bd8c46ff5a5fe97b647d069155442d29bdc1. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:23:29Z), 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/QT3EZ2407207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1df3a2edfe7f143061b20de87438bb40644bcbcc66879e83a7ee907f19521d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ72547973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa971089a5512b571e2e10a22009b8a429f97e6a5959abdce23d39afc065d2e17. 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/QZTAW2567868.
lạc lối trên mặt trăng (extended version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c2ce519b2b3498d268adaf8b410a542d1b6bccfbe5df177101fb88dd7257ec. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFF2564270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d5ceda6e6374d194f7514616e5c630a1e72e7a1bcd572144dd34e7a26a388. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFF2564271.