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 0xf67e942f7d0947e46e2472bdbf9ea8e2adfdeabca0562ae3cefa6ca3743ac0a0. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72002cc7-7433-41fb-8372-139f826ee151.json and https://artists.proofprofile.net/proofs/artist/72002cc7-7433-41fb-8372-139f826ee151.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 0x1302b56e1ae58d8725f2e2f8ec15e0b4a0890a19e1045d90ba1295f3bf82522f. 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/GBLBA1200348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54526678a47b9e2a379f8d97faca21e3ca08405fba94580253992b0bcb617b4c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLBA1900496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4ce949a8abe0c8a63706f9bf0e849a3771b1d297a79b97c3b9fcb550e38a2e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBLBA1200350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fee03a1432f458b4832eff962d39b02f424ba1b9c2cf204973bf7bb4449ef3. 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/GBLBA2000530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3042c67e749698f079e160165c7d11f312f486a9990600fd7100cef864d1f. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/GBLBA1900491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf117e1c81a46149757f6dc96887f8a9dc3945bed4c21250b6befcddcc95dc397. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBLBA1200352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ac42f5733288d84d84873d3dfa4962d8980e945bbc59f56d4fe31d7491ad5b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLBA1900488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee08d7ec3c8fd00f0e2452b7067519afcb2e5afc16256bad97267ac8adb470d. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBLBA1200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf219c8d642b503e0636c19388529b62ba9f34b835400910fde2ffdb4d198070c. 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/GBLBA1900487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0a321f6efd5e9c666519d359920750fa2377396ba5bd32bdf1e89d8337587a. 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/GBLBA2000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8131a8fd510060a5dc00f59bbec56bef0ade5f5f58c0e336bae6ad49006c02e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBLBA1900493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcd90b7bc101d1782e26d7b6f9c364b07b0b671e69c4881fbd4ded29c9bbc55. 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/USQX91902589.