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 0x0ea32a40a2e1de934970183513bc098b1d3758d007e7d45a1a59dd0c60fb433c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/320efecf-a5da-4178-bb80-f2b37a3f0e50.json and https://artists.proofprofile.net/proofs/artist/320efecf-a5da-4178-bb80-f2b37a3f0e50.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 0x9e2d4335826194b78c26b9c4febc9409b94f15abd6ccc8c93a853cddfd80edcf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/SEYOK1402833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028def89d8543ce7a118094e95c0389bbc59923d00d475d55bd76b5179fa646c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA6G1559603.
The Last Living Man Alive Ever in the History of the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf861f05ac076224e5d7038ffae160e81a46325d6bdfba1315b5ae3c3072a2146. 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/TCADB1744577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37da018eb36c827f59e42342e0ecde18f12425c81d64ddf5039fdea138bc3189. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCADB1744579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e2595376542614247ad30d42e07c9d02992e862bca72d81b33b34a92719420. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCADB1744583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa586f9f9476c76c3a84cdd6a3427e163c89cbf24ba32e9abad16e69b183550e1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZNWP2451381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb752f4e1198635ad057aeb5c0440f49e2ab972658ea2e527cb2d43c4cf341c08. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWP2451380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa586f9f9476c76c3a84cdd6a3427e163c89cbf24ba32e9abad16e69b183550e1. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/QZNWP2451381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95af0818f9cc1ad534aa6c1204971795d8ab6fa12b65dcc9a5aa887f9d9b9ea. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/QZNWP2451382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7305c5d7b39c01e73595a30a2b55dba48c1866039442f9d3ddad62aedc24c5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZNWP2451383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fae9f61cc9683a27e4223dcf58d4bd256c65fa4ebe9355745f83254045eff1a. 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/QZNWP2451384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e83b923719045483051e8d4e3675c8ce60454eb21200d11f3f44c35c82b1808. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNWP2451385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7908c449acc62ada3490f2ecd93cf638240cf72b7c62ab9b0b2625da967526. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWP2451386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb505be3bff0849596d66ff67d96ee06928670569b1faeca03265353dc942142b. 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/QZNWP2451387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432840db0941d99dfa92b77cfc92f3d7bb4839afb53513ee2ca8c88eb0c5976f. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZNWP2451388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998ae78544313003320e81ee7b766956dedb7f081cdcceca884721928d66d06e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZNWP2451389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d51e5710af580bbb98480a45d610ef420b771d41fca6bb6db8537daec3ac8e4. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZNWP2451390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bdd1edcb4f9ab9e630e19265432e9f670faba43230c05c1659abcc494a54d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZNWP2451391.