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 0x5ea1159d2af54c5254279f90da742b78c49e3f6ecd1de4548908f3040f74fbdf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90c6e334-8193-41c0-a091-3048f81beac1.json and https://artists.proofprofile.net/proofs/artist/90c6e334-8193-41c0-a091-3048f81beac1.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 0xd7f5d96ab8368e47b923ec8c62daa280b95bd1a938b5b4908167f21a0617e3f4. 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/USHM22174647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb99cb42b52f6fca4ddc6dea4aba0a91e7c0a8e8e210f0ce91a5edfa64519eee. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:00:41Z), 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/USHM22174648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f02ae155ca2f01f242090bd45dcf40b793235aa40aa35e44c9ae48148d816a1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:20Z), 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/USHM22174649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6769fa80336788f5872248cafede79f6345987c25acd6547bc969456dc4dcc. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/USHM22174650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7222b615f79021d1fd87c77a312ac42116a9c3f12b4dc28b8a7df24242c1ae23. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM22174651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbc38d5d87e508eb9d063815dbd3933a7209f0ebc995b610c7b262c2ce1be0e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USHM22174654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970dbddb71b09b7e26ce092ac51e29ad3406deec80de83be3afe6a4c7b19138e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM22174660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86d1a8f777c0fb9a1182a81559e3e2d1c1687f800d4bae33d0657bc6df6cac0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USMTG2309811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ba7893ef8af641954b3c1c93919594f018b6fe0fe3d17d4e00d334d377b312. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/USMTG2508103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de437d225d496967cb5697c061f02ffc5228da109048e496b51685fef0d856e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USMTG2508107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ba7893ef8af641954b3c1c93919594f018b6fe0fe3d17d4e00d334d377b312. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USMTG2508103.