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 0xff3d9f8d1761695ac606e8e94c1631e3d5d8e137362478e2532f16e44438503d. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed01a89d-2502-4371-aadd-08c37db2e969.json and https://artists.proofprofile.net/proofs/artist/ed01a89d-2502-4371-aadd-08c37db2e969.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 0x4eee7fbc6d93a4183b5b8dc21e83e5cb14e99dca5977c02ccf02c75aad7e51ca. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:40:26Z), 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/FRZ110900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e74b05b8d00bd740d3801eb02bf47eaba79acd355bec5d80b5b4047d963c607. 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/FRZ110900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87319a160a29cfabb94511af503d4908ce11db119d10781be493baf6700b95f5. 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/FRZ110900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8527727ae2e194df4fcda354704c9504eb31d45a2ea28cadcbd048f2eccb950. 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/FRZ110900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8a6375200f9f98ce7a532ba37cb4d202b66a9d2be76dbc1cf245df4cee33c3. 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/FRZ110900054.
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 0x0df07e25cf1d5c5df668267c2ce263bcce0c67dba8bc38a539b35f373dd24528. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FRZ110900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2e8db03ac1b7dd7cc6b119184677fe57bf0c4c032b6d48a123269e13e3edb0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRZ110900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a98c8e658bfffb25c1ee7a52dda067cc16061b312e4723057f363b6657c97a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRZ110900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242b1bfd4e7c10e35dcaeb004884a2f1ebfa9861e4ca49a72ec568bfd9558aa5. 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/FRZ110900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e6fb6e1eb8ab30fbf4f1bcca90f66b3cbd93d0348eda512a439a5d9c884e6e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRZ110900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa24a77817128ae5b03feb42131e7b176383c3a2172e02e8f107cff0ede11fb. 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/FRZ110900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5526148ca9e2ceaef265949e60a0540457e6d8a8503dce3db99af3aa9049e744. 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/FRZ110900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c19740d1cdeb2c3791f208a287e699b8b639e2e451e51d4951480d34d5710d. 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/FRZ110701101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc822caf78b56df0c5325013f5380e689546498c4660cfb67350a0935eb5941. 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/FRZ110701104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa374414e67453173ff840a84e03805f357b274f4e40fec9a83d0135aa59cbfeb. 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/FRZ110701107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d823d368e76e9951e1e586c794ff9c24f2c97a1eeb2a44262c4d94a4906f24. 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/FRZ110701108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6846e14a5661c2e91cf1e8bd64e154487d5439e5279ceda82dc1e46439c9eec8. 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/FRZ110701109.
A Portrait of the Nephew as a Young Thief
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1872c246d6881cd6bc1d944f690a8ec2b629d760ff6651800115658c0e4d055. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRZ110701099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8a07a2271c8e535daad3298a1268aec44a374f3e5d134793ecb6096b64dbe8. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRZ110701102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22de8df8e9291b7e758e90427d6e908070e6823a3ec08ab9f391db24228f75a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRZ110701103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6781866dd5b46ece91112607ed94ba64584d4d1d6ea53c284ffa6c3cf28ed4. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FRZ110701105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7e6b825086af4ad607c36cf5daac181f9b483db7ed7c7995ce06a15fd1d838. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/FRZ110701106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ff7f5d69624642fe9e9484f51add8b56f13df08ef03c31fc07f53871774f57. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRZ110701110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2587dafcb00fabb8df37569eef4f502cf61b146160854a2bba9baa6f19bce827. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FRZ110701100.