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 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 0xfce3b3d3404a71b25b55c86c2e6e58c68331123305cf6117b76126eda9d91f1e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eda899ff-471a-47c5-95bd-359bb6cab975.json and https://artists.proofprofile.net/proofs/artist/eda899ff-471a-47c5-95bd-359bb6cab975.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chinese Han Music: Zheng Melodies - Above the Clouds
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 0x177ca5a6ac875e11ad9258ffb850d6aa7b8d179fcd75110e72c1646d424e5946. 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/NLEM80824115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d89c9adb9cc3a85b87294929b7c8aa8bcc447f4fb5cca5eaccfab867b923ffc. 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/NLEM80824118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d1f1278e029aaf36b5eaa92df464fce2f5e9e736979d0d9a21323800d7b69. 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/NLEM80824121.
Treasures Of Chinese Instrumental Music: Guzheng
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bbc9a16fbf778d8e1203de1b0ed9db941f134ac5b1c4e37ae94aee21877cb3. 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/USDO11201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990d5b2abd274b4ee2e9085f99a52db23819146c665d23424daa534d83dc97df. 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/USDO11201290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2599a77696678b2f4191cdb5031e553bf7db0d43105b875ad8e66d2df8ccd. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USDO11201170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf695a18536ae33ece0130d0eeb8b4e32fe37a5a3f36b14b1416e3a46d78dc9c. 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/USDO11201180.
Rain Falling On The Plantain By The Window At Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7151f05746866013cdef28267ccee59618c498d9b3ec167e71418ff63328412e. 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/USDO11201190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190dc3e533b53fa505a4798a08ef899868c7586052a8dd634acefe0cf1f43614. 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/USDO11201320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6420196a10bbd98a37d9c5477ad93a2fde462a046f87f03023bb4b87f45a421. 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/USDO11201200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd8ede9ff33555b8c12cdc44d8fd9930c4d44c93926be8671c38c8c214bd583. 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/USDO11201330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd11182e43d4bdb88c69620d8d2d17797f2b0f6fda2aee5bf1ae9f2bfb4aeb9f. 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/USDO11201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd23dd813ecdbca2db6c8fb920286a1cf505c3717e484033a638b76463709c97. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDO11201340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2331ae9788f64dc87f3603770779b570ac629d2dba112da7230fae3248f36480. 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/USDO11201220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97855e71e8f4cf0033d64d58fc800fe699f89969933c4430512d8ab255d7d8b. 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/USDO11201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea7ec7e6e196f807f6a09cae7f1b81147e177a8597627cf9e65860d948c25cd. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USDO11201230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554bf878008abca2e5a185a7c961d7e457cd8494195f0828abcd184cd82f24b8. 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/USDO11201360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42145378703613d51c467acb7b3d5a5caf5c849d9e53ed3bfa7eb977c36da344. 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/USDO11201240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554b5358c94a8b7b6f39185413580c7ece59ccbf3aa0b1a0f5beaf188f4fcb3f. 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/USDO11201370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544224250a4990f4df32d0746e682a8247e27863b3d2c221750c9b4c44fb4b39. 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/USDO11201250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ad9dfc62bff1cedb3663910fa3d9b5a28d921c99ba8ab2b662a3882fd1f973. 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/USDO11201380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe736e74e7b90a44ce8b770b09b6ffc033a928fc19765a4e971fd20274aae3c1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USDO11201260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08f6313172d49c3fcf3adba92a8a8981b5aec7e33e83a41ae0fd2a265105f7c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USDO11201390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9adf603a318152b76d0906070f25404576cbd0c69edb2fb8a2bff43b3a4d190. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDO11201270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6f7d85e3f92becdf58b0460eaa0431a06c2731fd60da6eb6b62885d5315922. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USDO11201400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be21f54411c9d0562404e5858d5b7f7ae466894f522f3695fa5e16d5081d958. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USDO11201280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc6bcb16dc62deb337cca17cdfa22e176253c6779872ed0b064ef75918c710b. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USDO11201410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573bb5eb4450def4a27be80895811bb77930ba07a670a73163516b1ccb9a2f8d. 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/USDO11201420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf73647c2927235221d8fdcf51ed28bbc6949810c1437408e876531835fa0d5. 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/USDO11201430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf9eec20aeb40e72376638c0e48aaa6980223583c79294e738156c1c2d5f017. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USDO11201440.
Treasures Of Chinese Instrumental Music: Orchestral & Ensemble Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ce92601c01df26d70a72574dc36832e55563af44d14f714444461f194afbf. 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/USDO11202940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01f8cbe9f07d41688e5c0bc2cf6216cd2fe09901c926dad075e7d91711b95bb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USDO11202950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f0da0da7668c21ea0851f68e17dbaa1e41c63b2186c539ab653bfc1bff058. 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/USDO11202860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbceb96d22d19fe3b3faa757ee79e46a29dd974928f7210331e9062f01c6446. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USDO11202960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f69b0a8333d52be489338e863c82abf0ef472a0356f9b9a32bcda6c4f49328. 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/USDO11202870.
Traditional Orchestra Of Music And Dance Troupe Of Jiangsu Province
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1018e0317470742e59314e33290c68c63a6f5ca172775282f804a80bd982a6. 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/USDO11202990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc2c52ca01c7fc11ec253e9c81c88602f41cf105530b53a5f0cf13cd472df16. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USDO11202900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775d33c9ab2fc00bbf49b2b3d8310202526e93a4b7b95c064f78058c0d30036. 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/USDO11203010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be8a35bb0a2fd2067595fdf00a4a2df0a87be87c2b63d64d8dc23b33bc89456. 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/USDO11202930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2cff85758cbeec25903a7d0bf4d30f192fa9c7095049fc00ccf66651b25d54. 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/USDO11203090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f52ba7785322d867796d7f0965be69df877606cf5de4377384a27daeaae5e77. 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/USDO11203100.
Sizhu (Silk Bamboo) : Chamber Music of South China