Chen or Ch'en may refer to: People Chen (surname) (陳 / 陈), a common Chinese surname Chen (singer) (born 1992), member of the South Korean-Chinese boy band EXO Chen Chen (poet) (born 1989), Chinese
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 0x29ac7ad7ae1488ef67712032b364e1b1bca925bc3c4296e194816166380a79ce. 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/bc32ad69-98ab-4ad1-a197-848b3573c0a4.json and https://artists.proofprofile.net/proofs/artist/bc32ad69-98ab-4ad1-a197-848b3573c0a4.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 0x08bad1e7a7fd39b0e16659cc0b89f16f409b01016b9a66d9be2202200ca285de. 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/QMFME2460647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acf5ac8837e39f385a5532f819fee67d40294ad65bb74d163222983dd0ed024. 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/TCAIZ2493830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589149fc42ebccc3394ebe382919e1ad0012121b62c9f6095dcc4bbd34385508. 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/QMDA62433784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cce6a3cc6dc1b7e80ed49a5adf1bcbe0361d21a0f8d5d45ec9ff64c4993d49c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6G2431159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865b843e69f62c5172e015e26aa6d858f1d5211d498ad747d279a932d121f242. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2475787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240a11436069c5f70676f9323f352050aa017ebd6f87ca5f06bc0fd2b0295041. 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/QMFME2378480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53660fd3188e475eea69d522d0a1052aca38d9a56cb826bad56c4f903367ae97. 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/QMBZ92345231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c22534d0df1d72d8a7f85cead96aa391a9baebc96c39362757cfaae7b77f32. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2331272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095518d067429a367f1adb6ef96e7ed719f6ec0957bba94df5390d9926642b8d. 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/QZ5AB2369383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d00c8e28d7562fed8ca64bae827f6098b2c8d60794e8a1cf7c04a46d2f338e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2304601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7c2fa26d3a641101649011300bb50f1832504b43ad1ef7a2354cd2a07146bc. 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/QMDA62230902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daa8b8c5599657efaed84caf9de83b9904e2e11eb68c578ea97864c7656e09b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22285960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a34cc8d32bdb138319bcd8445305d3a1154d9f70e30513069dae0030d6fa5d0. 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/QM6N22438802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9a3e9d97d5ba650c00c664c3d33d3fda1625567be557fc39217d1e8358256. 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/QMBZ92494672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6afceeeb9dddde7a2cf53e71632ca2b35b20ff5d036a4067757834836e4b37. 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/QMBZ92494686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33565046287472660f0a21bd4f4bf9b6bfdcba5fb5b38c91a82b341a4c8b234a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92494693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe45fdf44926b2d35efa206aa5c392f98b25fc7f49edbd50b0fd1c72fd398000. 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/QM7282339523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd433beec890c0c172b299c7f880c41a22bbddb17ae5b1b4079196ec3f15a70f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2421088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28df9de55f5c24b6f3a676239de960c38e4e462b640bfe0705714805e38bc91e. 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/QZW9K2408965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dca933673d6591913f9de49d152b544efb33d50d80858e49230212ca0b2293e. 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/QZES52566450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce5059e9de3afc9b5e60603abb12d05449c2137a3b350bea98ef74405bdfdbf. 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/QZNWQ2507523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6047a9bd2a32a515275cf8828dba0e32f0cfb2ffc73442b33f521bf931e74c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2517665.