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 0x286c5becc863dc1d05c5f95c245bff344b82581460072506ec9acdf7714b0513. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc9e6217-63e9-41fa-85bd-d320347bda32.json and https://artists.proofprofile.net/proofs/artist/fc9e6217-63e9-41fa-85bd-d320347bda32.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 0xfcffc517f143943c31685495afb8014f69ea4ae574760c613cca455530e495fd. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZES81973983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a32739af15a07700fc09818f48081342f67261f61112ad9eb1c69a1c62d67c2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:55:00Z), 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/QZFYW1926141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161cd575987691e9bbbd20beb113705cbd0bc2fc44021a9b2d03c97a39dd9113. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:02:17Z), 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/QZFYW1926144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618cf789f8b5ca5728dff0b9c99fd83b4ef715a3a188c62c098a1e82f3b961e9. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFYW1926145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b2e42371ad7cff7f1b669f9b7597064c17f7b6eb374b85b7254f9e9d6386a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYW1926149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3656da1f93adb6bb0ccb71d4ee0a4125cecc30f31c6e55c42b4646904a8d24. 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/QZFYW1926156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f52fdde4af38f3bc7097e40b05883a465fedbcf20846336a5fa95f95f62f59. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:17Z), 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/QZFYW1926157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2650d799264ca5f4a2396e2b7fb9b28de1f06d56d536e649d61c146c49c540a4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:26Z), 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/QZFYZ1954981.
When You Feel Sad And Someone Ask You To Play Something ...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c321e39c0686a604b43de75982704de198976e4702190419c85fa7c2ad9e34c. 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/QZK6K2121639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3dbfc25161527d77e7a2a49fa2ab27983762b03e9b1c32c368f258df5edba5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:11:30Z), 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/QZK6K2121642.
Music From My Lessons, Vol 7 Ukulele Style