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 0x48a6ac182e664751d6bae44c95079996e26cfd30e6640731257188d80a22cc5e. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c21aabbc-4621-40f5-a426-4db54ce28c77.json and https://artists.proofprofile.net/proofs/artist/c21aabbc-4621-40f5-a426-4db54ce28c77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Handel: Serse, HWV 40, Act 1, Scene 1: Arioso. "Ombra mai fù" (Arr. for Strings)
The Most Peaceful Classical Album in the World...Ever!
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 0xe0012aeaef12a6f5b5d37ad11944f4b1bf6c81e82db38fc5301e16d8ac7f8902. 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/GBAYD8800350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebae56e401b81d0676862081694346910fbdfd8053a72a78048003ffc67ac639. 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/GBAYD9700316.
Binge: Elizabethan Serenade, "The Man in the Street"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb290d586a95ada0027562aabea0ee02d2cd0cb94663c86abd4b72fa7530743a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYD9700313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebae56e401b81d0676862081694346910fbdfd8053a72a78048003ffc67ac639. 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/GBAYD9700316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc030d2184bd2ca65126b2e0a740650ce32ccec399e163ba898a0271756ad15c6. 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/GBAYD9700317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a1ebd9363ede98c3f0b5325433ee8118f4b02a1e3c528731d43d247938deca. 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/GBAYD8800577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b794f072fbaa5b95a171156d97207f5781347ab593dc8fdaea6a353a850b3e6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBAYD9700318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb290d586a95ada0027562aabea0ee02d2cd0cb94663c86abd4b72fa7530743a. 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/GBAYD9700313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b794f072fbaa5b95a171156d97207f5781347ab593dc8fdaea6a353a850b3e6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAYD9700318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a40ffc3fbdbc6893f2a5944511b3e01e1dc053b7ed4814260cc30748068a235. 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/GBAYD9700315.