The Last Emperor () is a 1987 epic biographical drama film about the life of Puyi, the last Emperor of China. It is directed by Bernardo Bertolucci from a screenplay he co-wrote with Mark Peploe, whic
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 0x5f12dedb1d58deca7a1b0927834d1f9cdcbb49441383d9f2f36a638bfd39f96e. 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/99bfcae4-727e-4b2b-a262-5337d916c451.json and https://artists.proofprofile.net/proofs/artist/99bfcae4-727e-4b2b-a262-5337d916c451.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 0x252923ca150e46fc0cda597537646fb24c817d7f61bbeb7f2ea7cdf475e4008e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CA5KR2209315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8535511a104a22729a3b38a677754a8487e1b23f4383fd6a9bfb424d5c8df1. 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/CA5KR2209321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056e68d5579061f7c0d72bba07dd5dac9c9d897c465f4d5397bab4685c6e4ef7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2209322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4500d4f7426f4c503e4ed2b80e3a772634ecf306d5955d18d62599ff4e3ad2b9. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CA5KR2209324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3903d47613b6fc4b8fea6ebf234db56dea602f8d77be59c18dbf9056c80870d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:52Z), 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/CA5KR2209325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee8862ed32cadde61b1a6f4e6739541aba25f28855692f9c1531a80d451a138. 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/CA5KR2209327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26b823bde11c46715e521dcc897e91236c7eda3bb706e246b988a956629cd6b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CA5KR1984469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b292573530bcf6969b18f77386b6c5615cef67b175d5bc37bfb4f174fcaf2a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CA5KR1984470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1291c1dca1159d3f197e05270d1181d9cee06fa9834412ce3f2bd25f04da1e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CA5KR1984473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383159ceab4fe26650e56ef2405cd7d5c190d5522d0070bff4438f24476925c6. 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/QZHN82457934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18ec483be486889f88e02f87f43d72d816c12b835621beb37121a13246e56a5. 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/QZHN82457937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a96940470aa26ffba06acda9e5b239ed2f05ada913abe9c3a0b617657820ca9. 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/QZHN82457933.
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 0xe398c89fe72887fdc38485a7f80b0891676096de304fd1b0f44bf0ecc79cd6e3. 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/QZHN82457935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf696225e3b73c8c1ca31b03662d415d830683f0588f7f8a22ee4860407359f27. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZHN82457936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7843b615410f9be58ae911f51b78c94dad372e480f0ed93d624749a823c7ef. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN82457938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba413ca9b6368afa669f3bd3624f466c8f95c89a01f6ea16dcb61de8043bd12d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN82457940.