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 0x22173e573e07a0facb8c4c86118bf200d341803dbd47e5d69e974de24b09a91c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91bde27f-1644-4982-b02b-6408f8b3997b.json and https://artists.proofprofile.net/proofs/artist/91bde27f-1644-4982-b02b-6408f8b3997b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Seasons - Winter Mixed by Mass Digital, Vol. 1 (DJ Mix)
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 0x7132dfa0b4d9ecf350a2fa6c79ed6dd0f13fe4577e4b57a012b42f3426810feb. 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/US83Z2213307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc30b15cc7fa0cb492a189478e3c58d998af30079689ce5cb1c462970ced967. 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/US83Z2122865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c2718705baaf5e61f7db93b3750b7552d763d919b3e92112a1c64c0dd6fc8f. 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/UKSP42100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3122fedfe8f9f5df86914065d798b25c22fd7576a29828e03b24f6d33ff25f8b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKSP42100180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eb517b31f889b6e9e6f65ac0df1df4d8abfbafa153f4e1c1f8267a6d38fb1a. 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/GBKQU2114213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9317c620a73f2726a08b92dce8acbc669bd5326e2fd1ccf8fb3f05578b0d6adc. 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/GBKQU2114214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa457424af76b6d6910b32588a6cc9607d86c8e81af0b2305540e89feb724c53. 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/GBKQU2114216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c67e0499e230ff391033dc92cef855cf9e1a6f4d33805d1f0d9f3e78fc3ee9. 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/GBKQU2114211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62b635491b95d176d75b7ab88cfa9f71796d4a00d8089dde8e4d0699ecd2308. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:33:46Z), 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/GBKQU2114215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649cbdfd3d2c73eca00205962f70136de2754911a330cd16fbcd27fd884c32e3. 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/DEN061501222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba652c79c9b26edd0a92838e8978d4eea369be43feafc08f2ebae9e1542d9e9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEN061501220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa48ff544130e07346a44f120fe38ade19668927d7457aa15058a5adbebdb232. 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/DEN061401416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99a0c2b8f1cf815f1ba1752a15a8a713eb867294ff942f87aa48453f4c745ad. 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/DEN061401414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a95b50457dded15d9ef59301d4c44cf835d016ff5467adc67b9aa05305bc4. 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/QM7282423675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c33a27607134a3d57c73009ea8d477276e80f744eda6e5f782caa93ce2041ef. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US83Z2492340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3830bd20c382bef53ca081a403ba569539d8ab2552a96630bb6e2ca4670884a1. 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/US83Z2492338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8051ffc629f768286f38575cac0044a9fc58c6915c90be801f3ea1f46e38ae11. 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/US83Z2492339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8cfd3b953f9d6261bdd45774385abda27d6d7e131f107e102087a87073e94e. 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/GBWUL2479098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412f7453fafb625d5e19a256ab91a629ad85641bbbb6292ec1278945c784bf9b. 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/NLD682400059.
I Want to Come Home - Mass Digital Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370b38099c6e7afcddf4262e680e09d24ce8953ddd7124137cf6b67aacb714bf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLD682400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462fdb4d79e9919f43b36baec2d74401e32a21939d1fa8eaddaea60f5f3b9914. 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/NLD682400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ab9a172bcca12483fede9aff3df4f421d66699605c6d09b49a2d73a8976d65. 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/QMBZ92364317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1467c66d9e82f4aa4238e481f149be733fe5b90682d59a1db4a4aac5ca6d9827. 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/US83Z2301198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22c6706dbad1c9d4867d1dc7f2031e198122f386a317ede583ea4ebc949ac72. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH3132300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90223225edc79f39384cd2223afe72b503f70947acd0b7b91a8b3c562839f478. 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/CH3132300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970c014b6765efc0026b0ccececb4a2c917871775c07b5a60fd3a18035b182f0. 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/US83Z2229616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59347e6250263c7e71c1ff15b491d159344679362ff15a17c7c668d92c08c5a4. 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/GBKQU2269129.
When The Leaves Dance - Mass Digital Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80eac13132ab71f623767581389bbfb215e9b69cc32ceb01dfa6114c6bf1ef1. 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/GBKQU2269130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65b0b312c87f06368d654d21285b06831ce3c9847a7d8823692688f2e8a2a45. 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/UKSP42200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef2d584f839196f41f5e8e6d4224a0a416deee347bfb1e05b6408393628492e. 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/US83Z2212817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecfac26a03673fe89b138e3f4827bde2ee9228974cd3f096aad229abc644717. 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/US83Z2212819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7132dfa0b4d9ecf350a2fa6c79ed6dd0f13fe4577e4b57a012b42f3426810feb. 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/US83Z2213307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608d02a0293f214da40ebfcad291ad42250e102baf78c128544d701b3ef20302. 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/US83Z2210079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f31631f2273517da2fd802ba5e9addcbc42e58460251d66d65ad96d7c7cbe96. 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/US83Z2205579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7c76684ab6b9283b70a999cbe08b67b2a362949d0ec41441673915a85ad94c. 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/DEH742202451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd007deb842b17355a19a0ff8c25f2b9ca8a3e59a8866e2dd290fd36527bd8366. 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/SE4MF2100359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21da1e6211a198383073d4b337db7bea38f4daddb774da24c6932b6157eb9b11. 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/SE4MF2100364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb18b737e689e4c2b132b5d7684b5e8f41b86f3c869da57e26d69f8e2db6a1c. 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/SE4MF2100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ab9a172bcca12483fede9aff3df4f421d66699605c6d09b49a2d73a8976d65. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QMBZ92364317.