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 0x4dd729d2f1863827cb1070fd5181e3b1538a11427a4279c2004749a697074969. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03e283dd-7a3c-4e50-bd5e-73ab63ca4000.json and https://artists.proofprofile.net/proofs/artist/03e283dd-7a3c-4e50-bd5e-73ab63ca4000.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 0xc840569766bef94dbd4965f07f510ed1b0e9a7900c7ff5f77f1c2819bdcd1df7. 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/HKE022235433.
行舟問柳（伴奏）（電視劇《柳舟記》主題曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc7a2059ae6d143f54ccbec34bf0cd026fe8019daa70466050f23dfbae7a244. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKE022235434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3a96221d3bc901c314eb819982f8611a6c158648fbd3d8b18a00ab02f13b93. 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/HKE022235466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a0289c87820f9c230dba9dab450a0220a2be4e92832d34732df96a5da1ab06. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/HKE022235467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf550cd9c0f6fab6ad99a4a4836a612639c37db15b91cf23c93127a69c60749. 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/HKE022235468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4580e6abbf21437d72c23daf239b3363749ae30b6a726e414807c464fe0309. 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/HKE022235592.
《巷南》（伴奏）（電視劇《柳舟記》劇中衍生曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25827f1e2808a9428e3c83d27bd6a8b0db22d42490e9b30a8595807b5df0a311. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/HKE022235593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e83bb3b902537395c98a22f51fcd78eb6738ca4fbd2d97749379239aa56ffc. 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/HKE022235594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cf0261ea8c89d130065bcb81630a84843f0c0d80ec37c0bcfe4fef17d61eb6. 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/HKE022236383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202be9bbfc0dd49b447ae02036e86648c44a9a759dceb40a8a6abd820c13c697. 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/HKE022236385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3a95e066a2eb7c4056a5760f63c579a9407f042f5a854cc22e028c04cfc2c9. 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/HKE022236389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d22f5b4d65ed7a76bfb227bf22388af272ff8d9facc26fb606d93f88791bde9. 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/HKE022236390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1996a652e23fc2bf152db6c77b013f105a25e0a371ed8a6a26f1dad04d8195e1. 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/HKE022236396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70744477534e3dc88267de0196543b198a3886927c8981421b951712961e844. 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/HKE022236400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c8158816e01a0c35ac337975301b11656dbd7bbe598ae3ad9373255394eea6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:05:32Z), 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/HKE022236374.
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 0x7e86cfc74fc112e5d5ba8e15a2137d49833672529cab7466e66660ca6c942220. 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/HKE022236375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c3785bf36e191f8b21eb61b4d88f5c2784cac0187dc14af208c2b7be3f3e56. 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/HKE022236376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dde99fc7389c342570e5fd2cb3dd9accada3fc76d3195f41d7c8c4b8a198f6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKE022236378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a3778c9f38df7e22dd2325564863b04679cdb4554cb6eb19a2b73c1ac3ec21. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKE022236384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ef642917a653c5db0b764a9678cb25323d98b49566373ce1990c774710e624. 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/HKE022236386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbf1a20be88dc6fcf81dd7157e015041cb4d2759057b4d565efd3a92e766695. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKE022236387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a34a72ee9b520043658509506940e6e2797338f55723119abe56566ef58e77. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKE022236388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a09e743e2fb8bd3d445ef5386b87693f7d826007a11216e07cc667b15f7950a. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/HKE022236393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a17731c5bda3f80c1f83e1f34b35c09dc0a2154adf7b67019183cfbb380ee73. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKE022236397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67360231a99b70efbdda3fe3f2021df9be58ca58569381d3573bc869f94c5eba. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKE022236399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf283e31ce0a896d9398022afe0ae5090977bafbcb7062982307863fda2bba0e. 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/TWD251859504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b545769f20f679c6f58975d0a61f07fbff44dc45472fb9a8d85079f56b5ff1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWD251859505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d040161c65cf027c2b4c9f0fedbffaaa4a3cebae4de7eaf900e9fbb4e6c7df. 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/TWD251859506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26be4933081807644e4c2108201c66a28f3e273ed7150c13cbce163b6779f7b9. 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/TWD251859524.