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 0xb43d173147237ddcc0ad2105bd4745371899e9328fb18110bcd4414193766d1d. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/118fb379-e683-4c1b-8f37-3b85738233e2.json and https://artists.proofprofile.net/proofs/artist/118fb379-e683-4c1b-8f37-3b85738233e2.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 0x15a0168fd65fdebf69e475b28b679e36c74751c2ef52218639089c8f207d87cb. 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/QZNWR2152831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1f189be40cc4d915c70d9040d43bad4b0711f11dd3a5811e8ddc6313e00a1. 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/QZK6F2343837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6856f87a3d67cb3aad4fbac58ac8ebaec0fb18a7778f73eb6f019d43ba52494. 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/QZK6F2343838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebaed56277d00907e705901e3c583337eb7c24ed1f3c7298a53c0b888f4c62c. 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/QZK6F2343839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7763fede6df7375a096b6f827308d2f7b11e9a70c5967cc4f27f24f01f78ec. 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/QZK6F2343851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1373b09a24318bc85db8526138cfad9a39a0ce7668a18bfdd31d80bc79972c5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZK6F2343845.
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 0x88128b391e6e19c20f0ae4f1763e2b6914232b7c460436aefd6439d2675608e9. 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/QZRP42206643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6e166767729f98c73da7e61982ccd3fe9e3be7edf19f2e259a2a163817928c. 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/QZRP42206648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522bad9df21940c8bf5058d32cef7e68fd31da3d11597d49f3eb74337b63f8ea. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZRP42206647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56e7eb0707b2131ec64433a594a122d680a9d6d035850f85433be3e9ffc9612. 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/QZRP42206649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9282c76a392da3e1c82929c88087eace1fe79edd34424bb6a3a28ab884783e6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZRP42206652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2d59ae0fed87941ee615f3d75292aab180403d34e887ac4b01c6ae1598f50f. 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/QZHN52462081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26c09bf6858cb3ea72fd1f46e540edb71c8da381bac5bc63fb0e0cbbe4da319. 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/QZHN52450957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527af9a61d1c1f4e720f6e007f738ead33dbf8ff89b3cc9b2dc2ca688043589f. 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/QZRP42155247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d4376867736eee741d7e16208d6233068ddd6d0c3ee1d337159f9274344ae. 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/QZK6N2196123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6d67f0d1b0a4700d447f994483577539996d84841f67606c89a211e815b2f9. 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/QZHNA2179665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfb926066fb17eeedf02d84404cd6a194d25f3eaeea035744198ab341037ccb. 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/QZAKB2152925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2f1970bf60be758a6dc03c293b299f09cb1b4db98fa56154bca3b25824d828. 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/QZAKB2152926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1392886c3cea919e8c62ef0b76c3a32077dce386bfe563d4a1520b551c46b49. 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/QZAKB2152927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cca7f636cec6eb23d4231309ad17c1e4349d361c2150f62c872c7d736ef49c. 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/QZAKB2152928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdcaf92a72954de69a8948f8a229d9bcc259b67dd64f2767a9080a5f76ded04. 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/QZAKB2152929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342e02915342f805d310c7b9065fcf020fc6ab09a94d058bc39527a2365b38b8. 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/QZAKB2152930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422786682646d4491ddc0622ecfb2a89fd90e8072f3b9040c261a1144fe16c4e. 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/QZAKB2152931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd67f791bb978d1a3c25027ea4c73ea37d8170fa049c3ac4e75e7045199d79a4. 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/QZAKB2152932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe103b15d3a70f31c00d5acf35f57686afca8629c3171f1be0a4d551dc5acdb7f. 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/QZAKB2152933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ff0ceedccfc462d1f094f3e5a0352ad4def18ba7a9342da07ea63c839982ed. 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/QZAKB2152934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644ea5ea7eb32e01254051371cacb96502acfb03722361233d006cc569f644f5. 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/QZAKB2152935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2358089c6f51a35a7c80a86ee3b2a7dade86f716ca0750185bfcbb11fb438fc. 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/QZAKB2152936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5f43004ce89d1fa8d1f3ed83cb15025402533940e6a63cdb727391d7ab5dd. 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/QZNMW2136502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84adc2ad7e4d355e1edfd075d11d88e0c9f4290837e057c7d435947dcb6f0bb7. 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/QZAKB2152937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc040c036f49a646baabbea1d83fd28c58bf572be753bd6d8bfa4bcbc7c1cdba6. 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/QZAKB2152938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d7a3dafbbab72f949c1d609fa91265ded47f8de33d089f4c040ff453dd6899. 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/QZAKB2152939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bec4b8b0242201e182b6be8ac8c9732186662d1ee6463b19b6db7949d3995a2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZAKB2152940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f71085dc50c2f59930dac42f392538b6dfb6de762aec4cc1459a046e6294410. 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/QZS642101669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac97c1c2d1317f624812fa9fc605b9c088a488196dc4420e5c165eebb3cace5. 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/QZAKB2152941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40e74f6fc8e92dd831837dff868a09203b3026ea3ca62b64f810f6f9a53b8e5. 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/QZAKB2152942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c11bfcceabb015e80aaf414421b22b5ffee8cf07c52df8b04fd12028471a39. 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/QZAKB2152944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077098e44ca6cf639cc902413e7bc4f45636883730e79fbcb481b44d79831130. 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/QZTAS2256348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef3e7d945ff5abd2ad623e8fa34ff4ffedb1d174bcef463a11f59f546a149ee. 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/QZWFM2362195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48713ebc476933e9ba87834c0eb3d00050cce36e0362ec85f97fb13db019a64. 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/QZNWY2325346.