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 0xcbcd872f6d3ffca8ee4cd6f6ba091383d1ee218cc09ce84f71947c8909a598c9. 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/21f02d47-903c-4a39-85f3-c5a00535d394.json and https://artists.proofprofile.net/proofs/artist/21f02d47-903c-4a39-85f3-c5a00535d394.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 0xebf9b3749493eaac043f8c61f8453e9f36e537b4838f763d9084e9f3eb98f015. 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/QZGLS2439185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d81dd34042ace5f188ac678e2e0c976e70fcd6c7a88e53f38126bb252979663. 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/QZK6F2261272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb052f543854682a45eb8fc320404504d10ff1faebe0881aca702d2335e0c0322. 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/QZK6F2261280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042ffb6349c226893c20be1c4d2ca54008e67607abf5c2a5596887509554b07d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZK6F2261271.
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 0x45dc0d79051f5472474e546e2688d637a275baf16126f3c64d80c9f27ffbdccd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6F2261274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3c0d4dfcd5db043e700f0648eac1b1a43b0355fd72f5734fc43038e146c3e9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZK6F2261276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5273228616af1e08211206ea8c86c260b4fe6ddaeed5899ba0f995f30cd89022. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZK6F2261277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cf75862a5869a0a81d9868d51224c7edd6b73968ea67fe9b9f12cc27af2192. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZK6F2261278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9898e66c4dfebd6e411b407d5bc8736c1abb9fcb4dd8c97a788a4dc9881585b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZK6F2261281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffb0772e008c705b371e3829a21e8195c9eea23f81325c88d8c15af46804664. 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/QZNJY2443134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7559b75456130ad71695ec84785a5d6010d6d2b3d484fdef8343e59839cc5fc. 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/QZNJW2310737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b79cb7a16f98bbce9c7a3c25e3c0d1da8e80309f2f11ab987eb852565d10367. 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/QZDA52239890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75adb3aa30c7ddf03551189ef1dfcde79a9c5642ee81fa071ba2db4833644dc3. 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/QZHNA2074475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67178bbdd4935fe0152c29cb5325ba9dbc20e4db00289d16f060405de65f2c4. 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/QZES62070298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fedfc43f15ed276ac3d455e51ef02c44e14ad6fc1e2b3cdbfa4e9549a5792e. 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/QZHN92149809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5fb46ab57d2e00c969b5486efd54dabaf51ecd9a3a73ec4676405f5d6c01b8. 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/QZNJZ2341559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dc8f00f61473f8a43e17039030fa0044306ecfcde4ad172548b4d02370cf45. 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/QZNJZ2341563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760bb9dd57661d93795143c4514627f2f8b0b8c5474557836a599110675294e4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZNJZ2336131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e8c08ba5bc1eef651723e94e6835c9070f0a03635290e61252d3f1f2f36f59. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNJZ2341562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdc033f449f10484e00355c849c3989aab899c788cda44915eabad6e0ca66c0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJZ2336159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9046b587d2df387f0a518a8091b71847e619c47c8434dd0592bb920ae7836a57. 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/QZ5AB2322116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ed4b58841dac39d9a59d35120499be10ae051141dd914bc39ad4f9e299c208. 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/QZNJZ2455577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93164e8bc9aadf5617c8d601513c529b313c4483ea04e2698b378a119de8af99. 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/QZMZ92366950.