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 0x5a4c0026482e14dfd69139b427b37ee319dcfeb7a773b2b47f1a65699f07f08d. 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/22e31442-8877-446e-971a-19f066288a6e.json and https://artists.proofprofile.net/proofs/artist/22e31442-8877-446e-971a-19f066288a6e.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 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 0x63be71f9c2b39ddd20c3f4b0c7054bc82925b2ded933146184a3dda7da226552. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HKB127801078.
浣花洗劍錄 - 麗的電視劇《浣花洗劍錄》主題曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bfc66083bec1863f251f46b093b0d725c9441d1985f8d65d88137d2262e660. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HKB127908018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1c1cff1f8e06abcd81c2bb7dc39c1b6b599f47931a8a8f7b9a19c7456e1ab2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/HKB128108028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991bc0a999ce48a08b5f9fee74ca7b09f5a6d15dcb4c020618d4498f24247261. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HKB127801018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d17dac8dbdec3a6e3ac7acd2d5b76ad74a0d863bccda5299f6ff01973b8e38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/HKB128207088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec473b1a6f43911e734ed855dc71c85242a706b0b1a488707aa759582aea1a1. 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/HKC630401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b6bbe677a92f8831b2d311399d663a6f8b6a3a3306f70e41dccf258c8321b0. 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/HKC630126137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f5f0ecdb8a81808ef987f98455b36e194559214960cd8bc7ec1f47d6b5cc8f. 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/HKG092300082.
Medley: "大地恩情 + 奮鬥 + 射鵰英雄傳 + 風箏 + 忘盡心中情 + 青春三重奏 + 一生何求 + 金刀情俠 + 大家姐與大狂魔 + 驟雨中的陽光"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1ec9c656beeeac902aa82fc9da177dd58998ebaaf72f93bfd6898c71f0b23a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/HKC630702363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe814841ae9a485a2ae1e6163ad65427f5a1d98a171f4fc1d969d6c55c0665308. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/HKC630401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85daa6e4ca6a14ae49c6963a776b14c16206556f5154b90b5fbad2007f6c8c6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/HKC631204463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cfcb1a890586f52300828390c03d30932465198da19a8d27858c603708fe9c. 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/HKC631204459.
佛山贊先生 - 無綫電視劇「佛山贊先生」主題曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4df61c7ef7852dc059863ba74b83b5dca29c85aceb08e23f9fb689c55eb70a. 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/HKB128208028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e24d2c0399e97ea27a5dd5b1ecde827baa0f5835700784a43c0cf09c2f57ed. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKC631204461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f630a87857f2e4570d61ad539badc62921491fd0ebb0c1215f6be247400699. 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/HKC630702353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d17dac8dbdec3a6e3ac7acd2d5b76ad74a0d863bccda5299f6ff01973b8e38. 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/HKB128207088.