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 0x724260b0dbe1238276cf1785b7accf300eba59b897ea9c684c285df351938b67. 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/73ca3e99-fec5-4ff5-8edd-1b459b0c4477.json and https://artists.proofprofile.net/proofs/artist/73ca3e99-fec5-4ff5-8edd-1b459b0c4477.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 0x8d140e3169f2e7aafbd64e6f0bb3d200a7324c2744febfd9a6458d704e1d428c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZW9M2281889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48395a3dea54a9c5c4b069288d6fd0449fe9e08e4bf167c27df52eb85f792e6e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/VED049300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ec10e1a96effddba87fab9b778dfed46cd2c24137ad4f4502203b8a5d653d0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:19:38Z), 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/VED049300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd036dcc3fd4bc2b06b8299fdb87db3208bc3c661cf90f104c6704305ea8c800. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:45:03Z), 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/VED049300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4225a2243b01a08577b165691920e9933f46efc28672b416d73d8ae3ae6d2202. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/VED049300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c523d9d96e66a7fc75f4962eb030cf2e99af9ccba88f8f18156b850bb561569. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/VED049201526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd7a04da1efa458fc21ac1b7b4a16560f6728acd2594491409e4aca9a40aa3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:55Z), 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/VED049201531.
Quirpa llanera (Arr. for Vocal Quintet & Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc80f62c64f3922387015fadf6aabd3db94dc094cd6b231a868bfbcba06b8cd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEL112200175.