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 0x01bd2658e0dcb5850ee447956b5508ff666a1790a0d16ce3c4a73d535f0bdacb. 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/d8a99eac-a92f-44fc-a756-a9813c20d228.json and https://artists.proofprofile.net/proofs/artist/d8a99eac-a92f-44fc-a756-a9813c20d228.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 0xc426a02c7c10cede20e162c8c649919cbbc0df16ff2ffe35d073581f3e620c2f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/HKC372502749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40489937b9224e3e11342f893a95a37a25c136491967ee3ba32d72429ee42518. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TWCC31300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6e24fad3a9210ad05b7bd6de8d0f40347ce3b115d33875102c3b483fb74986. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TWCC31300057.
多瑙河畔 (電視劇《最後一張簽證》主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9953fa75f51414f0111af2741989418a0de26318731aa13e85ee79d719535497. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/HKD012495598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10311814849872fa54e434ae07dd77e6afe99aff60a0c1f50aa972c261a65b6b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWX351900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dfb286da7fe62d285f9a499c9d04a6ce4762e95537804fea3944d7712de381. 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/HKG732278613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8274822096454e65e51983f295573fb48ce8e7718e5dba1d521e199661cf0db3. 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/DGA052395377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731261fdcdc681e9a555357d0aa0f6587756e6c30738241a827df804cb29cd10. 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/DGA062307092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a3f382baa376c44d1a8e5b37b9fd5bf32eb091a9be6b0f7e13a8f5dc3af62d. 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/HKG732278585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc086e4af69b056f14b68a3314cc132ea39bf0642c11f53048b92f1e2958c4f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKG732278587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7917ac666680710e4fd9994ddd343e24cda9c7819fd0d954eb8ba5671e1857. 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/HKG732278590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc364fbd1680904c95ae9ab869196e8b825ee6bb92beec4fccc31cb563ac32df4. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:10:46Z), 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/HKG732280550.
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 0x27324c0f6daec45501bfea797948ef65f4c837a4a87562a9373a1a60fc305993. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:21:08Z), 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/DGA052392623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549be3334a29f72bdbd98c52bba9d485d88a6cfe83920b5f25ef78ea0f36714a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKG732278628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb8fa46bb7f14fef981dce1833e9f652eb32d81079b74e7c870e2fa048089ba. 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/DGA052392221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1828d5ae14d0a15428edaefba7d4ab5e9029916e5015042674ce0bbc070fb01d. 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/DGA052398523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80825bc57cd9f254f134e573d93d13d365f7b39718ec1031c5f1462cb7f32f15. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DGA052395367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593627f5794b0574293fbeb62c2fe6615d697813b44c2e97f6d67b0859fe213e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TWC612152003.