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 0xa9a0217bcdb652db85c49209552d95855ce6b87a6f70c20b80abeed324ef61a1. 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/441d408f-cec3-4f64-99e5-40c963693fb1.json and https://artists.proofprofile.net/proofs/artist/441d408f-cec3-4f64-99e5-40c963693fb1.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 0xee5f51b7a99f0a63eb39bc8b240a315e12caaca87ea8f0c6fd4c386ab62bd3b0. 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/QZHN81967651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe8e370838999a8f459e69612994d76a98a8c094b896bda54db5d80cef6d8ae. 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/CAENV2167696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cff21a03e318dd651f9eaafa64a076110022069ce453ee965b0519e58106de. 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/QZHN81967653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1821656bad1f6b82b2a09a4e25e2101685e32b729c5dab6cc17e912db96f0b3. 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/QZHN81967654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49319cf146db69dbb4428dca9ecf1a280b89bcb50fefd43527d578e7ec3a2ed. 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/QZHN81967656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0abd0c9173dbf78de779e77e1a36266db5fda8d522d33182565703566ca2fe5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHN81967657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f1f70cafcc0c043a4b5362b1fb96629a4c405ddea9c0a6c9044724f666065. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCJPJ1946489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f49a3f9b11d62face1c623e70ec81a4e3aba299d686f4b7ca4e2c3480d486f4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:40:57Z), 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/TCJPJ1946495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f82a966f520159b38fd9d0888e5bec5fa22c35a078a58647237f6232137211. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:44Z), 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/TCJPJ1946497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4a78f0de0f7d9aa71bd23867e16778598b591c18d1a6d53694927aeddff95a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCJPJ1946500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52ff4e345a6289e92ddeb89734a8ef9e31c44b0b0f8eb2316adb148eff73055. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPJ1946504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96716ac38a45dafcf20a03cacff013c7913fe45c884733e2bf071b9cb86c6271. 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/TCJPJ1946507.
The Songs of Innocence and Experiences. They Are All Demos.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397fb586341a18e4c23e58bda5a0df148a8b7f8c8aaa8683f52fe0e96d388727. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES72087756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7538515c6cafcedfe599c900091f7a79df5cf9e9f30226b95673618aaccf14. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES72087757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd351b876190cee628f7556927b722457e09749e23fc359ae8ba2c8f1a359d76. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZES72087758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb3f317679434eef6668672ad649e7a09c36fc8bb1124057e3164bd8276fe83. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES72087759.
A Bouquet of the Meadow / Japanese Old Folksongs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f470982f68b7b2045224e01e97ac18232adac386c13bc40d1ea6c624ac4b580. 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/GBLLT2027954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2adde3c782856206893a04036aa1737082b173d6f84f31b71fd636092a75242. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:23Z), 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/GBLLT2027956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316b5aa1e0044fdd6f95f50e06cdcf03e6855c8c5d3d54a22485b64a32dc423d. 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/GBLLT2027957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb197d338f351b3c8209c4b548b295575b3b50572548aebedfef0cb040f7f8fb9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBLLT2027961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2633a0f1b95615ee703b5bc5434e8c191dbc9b130a00c2473cf7dbca4712b990. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRS182051687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05489de6f971012d9ee8dae5011b4db1d75a67810c040ae1c8e07a98625d9b63. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:31:00Z), 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/FRX872013380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941f05013c77fa4d7187ba15f8517d4f3665d4fa456c7ffc32ca19bbf9d0f0ac. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FRS182051689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3f0c7ef611612cbbd3b6c0a7398708335646ed9ce044718c88c62677b4c12a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRS182051691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d18f9f046e1fb56792b4e11eb8ecb384bf4b91adc303b704dec99b386348994. 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/CAENV2139180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb792d97ba4ec664d8268f3a6762b9edd3b776ff5c15abffe093d7dd120d21a15. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CAENV2139207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d7af10c3d73271fdcc864acea6ec237e43f83283103659ace2142738b75af9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CAENV2139179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3c627307920a01697397339edfc234164a8babc6b9f4f05c116b33d9839cf5. 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/TCJPQ2294115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1761d288b1fa30c124434329ffdbae38248c6b9dd1aedd91c9cca9e222aa3634. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCJPQ2294103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1d54b2cd1f794ee4f781c1d442f349c4cdacd9dfafe65c556533a003e97884. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCJPQ2294108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac4867e8ebff4f4742833dd0093229ce2bde719514735c915a68fb8b123f9f4. 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/TCJPQ2294112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3c627307920a01697397339edfc234164a8babc6b9f4f05c116b33d9839cf5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPQ2294115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7850ed02708fc6bb7fa17085b823d8239c2dcdbd3015215b605f5ca7f180a4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCJPQ2294119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1a2a7c52f8c6b9b09080ac3e7de3915b130ceb20ea069ae41907e5afbc5c9f. 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/TCJPQ2294124.