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 0xa0bf6e7aab911e1d0c231364140ff25dfd145dec0c466aeab2db114d9dab8756. 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/8a0ff94f-e045-4dea-b87a-bd9c62ff0cfe.json and https://artists.proofprofile.net/proofs/artist/8a0ff94f-e045-4dea-b87a-bd9c62ff0cfe.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 0x4e4e51f70da9e2c7361dc490dcd1e4e3691044297eaa9e6f130a20573daf407b. 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/QZTB62274206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b03d918af4adc6dd44d2c2a090641b1387984a78a154ea4fc23a9e9b2e78b1. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZTB62274207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139744cde2aa064c41bfc1452b66e8f98c4ed1b10e13832ba31ed62b48b8239. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTAT2207683.
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 0xdaa8f421d00f39b6c152492e5e817ffad99c49a1cd8827ad8e665ff1f2383203. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTB62274208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff5beee06f0c028a1514ebabbb1d63f60bd4127f8810d2461775ded5251978c. 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/QZDA62438663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3076894e1a7b848ec305f72731a2938485d5605c21f8cf625d30e1ee53877457. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZDA52429585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f65fcb0a36e5a4e76d1d74225299cc35305ea11e42523a018fe3a26edcd0690. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA52429586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6920818b6442855aa8491af094e39b927d7c4eb4cebbe823a691ee1d230d32. 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/QZHNA2450018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1b41ad0bafe618cc8e4c29ce470bc82bc38468053f7703f1f40c40dedfea7d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLV62308973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01d5689f753b54f00b81112c7a411d568c2d7a5a9a5dcca8049df2c8b778abb. 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/QZFZ72083244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fddbd15ef16d6181fb11cb51d2db21b92fbe317407eabe38d2394d437ca139. 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/QZFYW2003750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7218f4e2ec7ed4fed98c561f511ce300f1ae33b5cd277e1c6586d799cc462f9d. 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/QZTAY2446628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13d57ffcdd5b22d03fba369825f67d90871320c8bd24de2c2ed70f627f545d4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DGA072419148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21273b552bdc326e8d1dcc7dafa6dae46cae185e05d1c7cdfffec54c59b3c0b. 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/FRX872435809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd573daa4d0a2f305baf1cdcbd8206d4cfe385f0eb3d49c58eaf6b366166b0a3d. 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/US3DF2474316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33453e1cb8361a80f1566c321806488974769916a78c3ffd8824095330da0c3d. 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/SE6HN2451955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d173ddaf6b5e516f38be8f101a9c47c820f5c7305e24dcd56af9b73efb495d1. 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/CA5KR2463684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e69b410a56a3ae03354c6ec169dd9136cd1876c47ee81f7db466c4f9c0fce2d. 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/US3DF2431564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883c83492f29a936ab6e6aa78cbf0123af0245d3dd93abb530d2c296660744ab. 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/GBKQU2442634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb644cb91817414c4329379d3826dfe03ae545f058b19e3f93b8f3b325436f3fa. 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/FRX282460023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22dd8fde977e0b079b5963b1a7cecd68e77de20bb6bdb58ed5362149b7d9463. 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/QZHN92498435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6692c5a64357344664d378d155490884d2f5146981b18e77ccdd8d1176d6c7. 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/QZHN42405033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5005f7c8d5867d92a6e8b55aed522cf3b33387061181bfcb2cb53234a788bb17. 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/GXBDT2342664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c27bfb851a93266573d578003f63d2aff49db037ea73dc7af60f254eeec5a0. 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/QMANG2236044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d9a6bf9db59761b954cdeed69df1561f4ee515fef26afc1b830ace061b380f. 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/QZS632243249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62365d3eb1c8a28d95624cddb5f6442b4f73eb0119e3512d7d9f96ad6e482a9. 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/GBKQU2400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21105679abd4b368ce6ad099d5b5dc7fee2e01c999d3715f69b958f0ed06c7f6. 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/QZWFJ2317046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c501e1d841a480083c56bec67e580da6bd8ca4518ca0c98613f224e6db7809. 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/QMANG2256174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d9cccf628b7431bf05121fa01ef01d90fe7421d23f9af885cbfb1c86a21d31. 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/QM3DF2280077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ff567663577cdae7d91cd04044f97152bd8e928476c267fc0d8e927bdf5ec5. 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/QMANG2228894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a5861684aeae2fbaeec0d8d76b3d1abe461356d3fdad8a660c7b17d12eff97. 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/QMANG2215278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca047366e59a5cd6f2b7843190073f56d8d2ddb0d5f7d996aa0898ec103f53. 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/QM3DF2272665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08012ef28fe7a57537884eeb601981c77890e3c879a8ebfe6bddbcd28870ae27. 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/QZDA72351476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5280a18eeabc341ec4f4daba371f89e56117bb39e3b3138d0a9b5e5885e01aa7. 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/QZFZ31930840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8d57b3581d94276ea962c8bcc2ca68a3de9081f9bc4b4b2f1afa6e9400396e. 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/QZTAZ2313443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7b2d3095129e384ee9326890cea9c2e4ae5b911f8189c9b79c3b40b64651ef. 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/QZNWY2341749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59f1aae2391fb70fc0507ce9ebb1e181e99b9243030f9136afd675041562708. 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/QZMEN2390739.