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 0xd15445a2cce80f2fa8482a411bccec085a5428520ba43fd78784075f3adba4a7. 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/f2e4d218-93e8-4178-b90b-1637a46b8e6b.json and https://artists.proofprofile.net/proofs/artist/f2e4d218-93e8-4178-b90b-1637a46b8e6b.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 0x52694d52628ff7ae6a8367a0c9748512ce26e0740f03988000548fb09ce72b33. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/HKG732267295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73417e4b4ed984db2231e785784b31d88b119a2fe710b97d7abbb6d0cf594efb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HKG732291480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dbaf28cacfd022be377faae8e0fb5a3ffffe39becd89bf222ffd446823743e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR96X2399273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb03493848b8b727b834e5ad9e454931618544c8990f48af8f314be6d0096811. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:39Z), 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/FRX762332928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c20341a8c4106305c0c1aee93fdbbd907b9222e123b2f822aa67adb1e1e99f7. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T19:07:49Z), 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/TWDL72306080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31caf4fd82b428aeb2aaa573c297604ba60d3d2517a6d463829db1262ce8618. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:17:53Z), 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/DGA062339272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140d7a8d89a622be7670e753eb3b36746086244cb915a5de5472b30ec885661d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/HKD012379484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d98dabcacf3217f3fd33ea30ab6b9652b805f0737b107769d8396bd68b53976. 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/DGA0L2362407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2d5d343573b9e18839ef89ca99fcb149ec4bc907fbea4d386b26c6f8f5efa7. 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/DGA0Q2348458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c643288cc6dee81eb6e793179abbf23d6df013d53295918949f8d1a9a46718. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA072477036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da61d109c09f85b3bf67023951f58dc06d097a6619fee90555cacef8e684da. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:23:54Z), 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/FRX282524938.