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 0x51fad689a91e1cdaf8a16a1ad7ec0f519b1987eb4309a08fcb71a70abd4eaf79. 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/9252e617-7632-46ce-80cb-17a827d2e607.json and https://artists.proofprofile.net/proofs/artist/9252e617-7632-46ce-80cb-17a827d2e607.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 0xb9f2a2c3a58e5cc2acc9dba3e5c7988975a2f3376908ca54c8f89bb1bd57e9a3. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:37:40Z), 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/QZFYY2210125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d31208a693cefb5415e325526a4011eba205c91b9b7b7e13b0c3158ca25d8f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNA2228945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0055a64f7d48ba49ea0727a6dbbe00fa34fbe4088eb3be5675afc250943e2a7. 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/QZDA42249244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b6ee1229e638910c05b4f321e93170f27577ff8bae1cc20f9be9467d784181. 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/QZMEQ2272107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fb02cba9d322816b6222a5caae4d1ac748e2175ae783213aaac729d5478064. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GX3Q92359517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a37f818a5bc6fa5c79594f3b3c77915a04fbde88a3784f107cc7137dee2a15c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX3Q92383084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62173a26c024b2ed3c143a363816d01e7e12ae9009ed76916c19308ed0724753. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBLFP2369728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0225d13807f3775b39cfd4f8b3f076548ea4fa49a6c8143f75374a97682bde5. 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/GBLFP2373571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274d848bc661a0a02bd012136945c0ecb131600fdf896219410b1705bfc20446. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTBB2344527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e3af9c3d52d0cb0d54ef4a03711d40eb04dcca4461f4e887ee23eee66a3c38. 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/QZTB62497417.