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 0xda23926786d1acffc3874e790d4a1ca68c997566da06fd25900ef01d99ac22f9. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/816dc6c8-ebbc-48d2-86d1-ec7a9b8ccf9a.json and https://artists.proofprofile.net/proofs/artist/816dc6c8-ebbc-48d2-86d1-ec7a9b8ccf9a.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 0x42d5a3f15f140f3b0d896f7f27775ef6b3c2529cf981398750ce4f5bb9b712e7. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/DGA0H2457784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495fd10088f6730df5c97cc79c25a6675f9823bb7119e46085e9b3ada2a0582c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA0Q2408111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db55f859b8dab82ac88c93b6ac55ff3c36a051784afd11333ca15e8b386e21d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA0S2465992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295de1a770d84e219b95455cde50e2fecfc860851983ef2dbebbf2502b8b5275. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3T42423123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed1063a39f168d7aed82d7b6fbb8560fb269ad6dba6534a5e25e3a248d2f86b. 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/DGA0S2415414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4bfe433f28c40a0f7ad3b8d4ad6674a545d85e0a5e07acf9038d34ca86cec5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DGA0T2404249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d42c677ce4f98af81c5ab29b084f87f94bb214bd89281a368bbd5ec121e3a6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/FR10S2516393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00e9b53fd3ab8a64adab4be52d206f2b420205526a1b980a512a97a6fee3202. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/KJD9P6213544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c33bff02f8689fc43563c9451078aa41ec69db308c06eb91eee52a75858add. 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/FR96X2537247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce92c0c7fbf189578551228750b5e0b8d84f23a7baf15ee97b73ead10357079. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/KJDY75274257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493fc5ee96f03ac91566de53fd4d97be561140242093356e5628c83891ddedd5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/KJ6Y33684015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb684acaf485744cde7015c0b4eb6fdbe7eb66d9b595ea6a1d92cb534e5094d5d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/HKD012531074.
忘了情忘了爱 (不如就戒了情戒了爱)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1c9ef9c16cba8b71ccd3b2fd262d2343ffa2dd304d810956b6f99ab852f3d3. 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/FR96X2556515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdc1012b3860b8cc5bb93e77668b35306e9346f31fbb105357d3b72939cc104. 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/FR96X2556516.