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 0xf3eaab5f60a6e0deed57d87aaf57680c71adbc5793cb0d977c4aa95fdbd3e456. 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/9c1bc3cc-92a6-4fbb-9c6a-c34269784e80.json and https://artists.proofprofile.net/proofs/artist/9c1bc3cc-92a6-4fbb-9c6a-c34269784e80.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 0xd991fa3f9de19506fc8b67e3d49a75b5c4c482ed6dcc0e024e5e60e1e59ed3e3. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QM6P42531058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4337c180762db4902c58fee3eb6bb2922ff4c0b0a442e856959bdab69cb9c17. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM6P42531059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2871b495642da335a63cd45c5efb89dc41f0928c561dbf7ef782f163228cb9e6. 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/USHM21511685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212bd3deac2e9f5f51257729bdb34a124aad190515241a1dc9fbae2566a7fa2d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM21511688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c06f0a882d782e3534fa135da11a72e04aefb188531c8781cad4584fa2e6f1. 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/USHM21511690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636f39151dc7ed96481d3bdebcf62cf512a0aee18d897ac87285da7e751629f7. 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/USHM21513901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54472b3ddc42cc929955cfecaa074884dedf2755dde6d0f509be4e455842fc49. 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/QM6P42531108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660698122f255921637d7f16af4563ec01156fa84c84ab7a5913c80c6502cc2c. 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/USHM21511668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6672896454b3bddbd151369ad289139bdceb63e38dd692a66f36d308ac7950dc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHM21511671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd5ceeff1d997f578daf9ff847aab41728b2540c29e72942a5658119c13b77d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USHM21511672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f59075000be1bad2f5fd290e6246bd71fd8892315e0759cdba5571046b7874. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6P42531507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da1edaa2b2a13af94b0f7de456cfc7c42d24d0f7b2887108bb6c59585ebcab9. 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/QM6P42531514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cc2757c13b053a9e375937e02b0001881a19e3e9c9205d45b3058995379f43. 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/USHM21579376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d0e446a76a4278b44c0cad773ebb39f6b5dff2c47af9026cc49d771a75fcf8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:58Z), 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/USHM21579377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa381fcb393a4aa5eb66ce8188175ea37fe0965ff2c2e0ff6c97f95e1d9eb18. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USHM21579378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa381fcb393a4aa5eb66ce8188175ea37fe0965ff2c2e0ff6c97f95e1d9eb18. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USHM21579378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448c9b2933815099e11a8a48bca6d80442eb2cd9464f7476c2659fae3787267d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM21579379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ac9a7b22a284b9589278d630d1ffd7f99e2c3958f99a6dba8e1639252ebd04. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:55:59Z), 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/USHM21579380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4f03f10dbe9f189f60efefa1702f061a9cad213dc49605f27ad216290235f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21579381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4c06a7837ac99e63a9f8e365ba5272b549acde15fa95157b0fbb7c21a11562. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM21511676.