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 0xe325dedc6b6d408ed3b2f6e342b6932798b11755907f0843de2f664a399f8db5. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a21c0b0-76cb-491e-82d8-6c8d1a0bf83c.json and https://artists.proofprofile.net/proofs/artist/5a21c0b0-76cb-491e-82d8-6c8d1a0bf83c.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 0x3b052334104fa1960ff6ddb885fd082f3693dc8a14c3c1feed233edb390fc723. 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/QM3LS2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e74559b39ba377f0c18c5be7b245e71f140d2db2e7574834589901624da1a6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM3LS2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fd0b9c2914ff133ce9e58b588bbcaa29f0ece220b389bb753eeb40da02e00f. 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/QM3LS2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841304f3269481514492fd6d7c4029300fb538f8cd372979f62664339e5798e2. 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/QM3LS2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660b6b4b0ae741a2689b51a17f333dafc52eeb24ac0bc91255b71f12e3250e09. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:20Z), 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/QM3LS2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b51b9a24101a8ccc2a2de44942d0567224117186a2baad483fa0e8a0db8a7a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM3LS2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6664753c625b427cec867aee46b1d71038e901271cf8d5e9c2c2dd72c52c78. 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/QM3LS2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b24f691c3d7f2bf90498b8b3471291c2c4ff5d0e7982b7fd15700dbe774cd4. 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/QM3LS2300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e29f8574d0b3ce3414b644c0fccda4e70c9b3bc01c339e7d8846b2c2e3fe34. 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/QM3LS2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a78c333f823aefc449db47ef39f6da9aa7664eb0f11473900b48e05a32e478. 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/QM3LS2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f456e9f4ab6f0e60e6a50a7f136b033058c446ffd1eaf7c6b86993ce2e2b492. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:04:45Z), 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/QM3LS2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1f8ee18c8366b2ad42d08edc9102f1ffed6f235fdd00b7c21d641967191db4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3LS2300104.