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 0xd97b646e0e9a8aac38446ded311a66a0cf7e056eb326e645f0f23eb515e65ee6. 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/8d6f9860-d4b7-442e-a352-37c416b254fc.json and https://artists.proofprofile.net/proofs/artist/8d6f9860-d4b7-442e-a352-37c416b254fc.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 0x40319b5810904ffef05a06708a74b1006ccf7fd623dc45644e193d46cab2a003. 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/DEST11500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7551e99396f4d8ed5174f50808510b155cd7bd8d8d3f9dbbccd348d97541195c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812069486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8f955a90e4a79bdb02506c57d4f0b307a59af04033c5ca6bc32ab4db71590a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812213178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5092162fa3fc9d4bee8e4b2d959a6f91832eafe52564377710018fa5fb03dd. 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/CH7812214687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720a38b6d5a3f370a7344234dd22ead1d5aa6ad3ef81dd7fe879a71b80195090. 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/CH7812215411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2ee7530e761ad2978b4340f961104bc8c8b3d82b056d88bf14a3845d4db5ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812355536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6767a271aab556e975c21ca0f6e3f50a4e69783fd3c86d89cd2aa5022025e53. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUM72000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e10388266da30d9565d93d2d129bbe021a2d9f34f222c64d06db072a8e40bbb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEBN22200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa595abc6b7bfc61bf909518cc4eea221654958b3ad67d252af57ed582b5d85e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72202216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779637c4e0de48307392dd77566687ee8f4f00aaac153b4299d44154b8705c38. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEKF22200683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ad6f73421160bd7d22e13f4ae980bcda4a50fa304d0227287019ac5472a923. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22200685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779637c4e0de48307392dd77566687ee8f4f00aaac153b4299d44154b8705c38. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEKF22200683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6810a3ce3376ff5022343168d452fa7a42773a1ab0c7daac5d295c4d740099. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEA622302028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68cbd90ab1de17d03586bf3e9455aba20fb3e72dd9a1bde1f7e584367d80dae. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DESO42000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a33c5be68ab0f9356bf72fbdf765512a77194e6ea72061ca7b4e1e09ef7dc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72303674.