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 0x253728c28fb5485c3d1e10a8eeb4fa9d03b4ce1f6855f735f276f112a3593e4c. 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/656c44c5-c7d6-4c89-be25-0d7b980a4d3a.json and https://artists.proofprofile.net/proofs/artist/656c44c5-c7d6-4c89-be25-0d7b980a4d3a.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 0xd4a79fc431a0ffec0baf25a1814f0120fae4d798b501760530f452ebf49d6930. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBKPL2138578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ea72f34bee389d90e806a242a13180d38fe60ba6c4d11ae3a3c752d77e1c0e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBKPL2138580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122836d4c29c6ec989c1627ff76b77c374ee25be66632d2258a8624850ee6a43. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:30:07Z), 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/GBKPL2138581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b86f34f2dabf55f2dd9788a04850520d4dd2377d1db53de425d98e7d87a9beb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKPL2138583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a79fc431a0ffec0baf25a1814f0120fae4d798b501760530f452ebf49d6930. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBKPL2138578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ea72f34bee389d90e806a242a13180d38fe60ba6c4d11ae3a3c752d77e1c0e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKPL2138580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b86f34f2dabf55f2dd9788a04850520d4dd2377d1db53de425d98e7d87a9beb. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GBKPL2138583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca27c1cf1efb5bd183fd797925c10d8aaa3fbec153455355a89dadbc02e496a. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:40:31Z), 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/GBKPL2138584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8904ac02925cdd81e33d8fb637a36ce0bfff27206304e867f44bf50ebed00f0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:05:44Z), 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/GBKPL2138585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642ef87e9b8384a2170ba20c2817a4d1c8e8bc2ac439c5d8fdc1cf7cf746f544. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:50:57Z), 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/QMFMG2370877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2db0156254bf90d44cb079972d9d042be4c5707040be2ca16ea6389cb1bc23. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TW2424451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ecbb65eebc66330c55c32ef4e2de57e8039aa013d214741790db5cc6853d44. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM4TW2422551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8241075be43566dcf82367b515f65fb830e8d1a9006c9ee22087c84e034f38. 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/QM4TW2422541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642ef87e9b8384a2170ba20c2817a4d1c8e8bc2ac439c5d8fdc1cf7cf746f544. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QMFMG2370877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2db0156254bf90d44cb079972d9d042be4c5707040be2ca16ea6389cb1bc23. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TW2424451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ecbb65eebc66330c55c32ef4e2de57e8039aa013d214741790db5cc6853d44. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW2422551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8241075be43566dcf82367b515f65fb830e8d1a9006c9ee22087c84e034f38. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW2422541.