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 0x5b3273a14e2598c279e9b1cac2a1a96cad0bcf2b06c18ba64ff5476119fd9701. 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/66d1b683-a1f6-4a5f-881d-b1720ef3fe00.json and https://artists.proofprofile.net/proofs/artist/66d1b683-a1f6-4a5f-881d-b1720ef3fe00.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 0xf3174b5428b7ff92ac8f3badbc536102cc47e9d05f5ab56838a3839d08c55818. 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/CNE011500344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fa720dae927bd91c7b0ece68570cc64e33f49e629daf9dd75c4427d78f865e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CNE011500351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2125a098fd7f627ff272b8e90cadbfb84514caecb44ad5ba6e10b84e9fb1cdba. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/FRX281911839.
二十四伎樂-國樂觀念劇《伎樂·24》推廣曲
You'Re My End And My Beginning (电视剧《永远的主君》原声音乐)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635e802e018f659f7ea65bb9726ffb306ef2182a1bee47ea2b4ad7f943a2cf20. 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/CNR122000831.
離恨詞 (超級網劇《大唐魔盜團》主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ec13f50b243d605e979192e33aba421cfc1d0344a7965641ccd711063195d8. 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/HKI322112035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff435d311bd65831a49aae6352f0bdf063987df8c909fb60a8c20e22eaae397. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/HKG732111726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3825f915c572a4b2f2ffe941187e4b5da70c755079b6bed5a6777db0d32bcc7. 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/FR59R2126984.
九愿 - 《少年游之一寸相思》电视剧片尾曲
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79587d423f612b10d43269272bea2fc8870c9f705647556354c0cd68cf7489dc. 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/FRX202066488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02cbd924f684190825d2bcdb8400d90dc686848b693be0985c4dcdbee8ea8a7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWDL72010142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cea379a852a23650b5b5cdab6aaa0028d1f0147e65e918a2e77240b615e6f9. 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/HKG732040921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e19f6663d2814f48bb18941f642f6627f53351d688b31a0794b731c6507595e. 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/FR26V2086755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7925e6cd462e6475d1328bc6a1fa1deb72ba7bd6f88f582ecedf02e2384a10d. 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/FR96X2198804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8c9c37227c12d29292f970b42f8a5ac452ed2770f94a15ffb5f817719d824. 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/TWU711801393.
焚城雪 (電視劇《人生若如初相見》片頭曲)
The Very Best of Golden Dog: 最佳主題曲, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8c9c37227c12d29292f970b42f8a5ac452ed2770f94a15ffb5f817719d824. 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/TWU711801393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ab37468d6a407479bc2b80abb4363fa7ec35dc88043d4969074346a42f922a. 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/HKG732040941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2bddb4b4bcd25bb7959d4c27fa5db7234fd18ab60a108fcedff691e5de56a9. 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/DGA0H2383414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b21564ed3ef584f647106fcf80e5ef99ad7ae80af425db3d74723a897626e3. 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/CNA651600288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954ce98bde246ce7dac427b5f569ac991562b326faeaefbab0a08e4c451c9ef. 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/DGA0H2348333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607c422ff5a69e77eb6cb9e090b8fa9bc8b036ba5981a404df4c1e5e94d1132b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DGA0H2314323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0c2bb1a137f6b0a9a4796fdb763ebd64ac035c78c8b408654dcc521236fe57. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0H2336705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d4a91bdcaefdd6ec41774645769316782ca9978f48c33594aae2268bf58577. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FRX282109604.
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 0x659763ae1936b150da96340eadb074be5ef8e2c381841041b8004080031f4859. 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/HKG732236998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d95a81ee9d9782710daf5ff60d908dda524036973f0246a8787e8dee4c955c6. 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/HKG732402340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6502d1f9f39873090b6b7c65e8d12304325b79e40894d5d2f9934c9ab3c149e8. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DGA0H2336648.