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 0xb06b742e718e6b0d70499aba6108cd4f24cb0db9f850939fac78e0cb1ddb8126. 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/b454502f-8a10-43b3-9055-5a3c17802be2.json and https://artists.proofprofile.net/proofs/artist/b454502f-8a10-43b3-9055-5a3c17802be2.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 0x642a486d5f70f141b6036040c97b41ffc1c4dac48968ae67d7d091b4fa4fd13b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBARL2301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab805be6f4585017c9be1e78a2580e3798e6fd7f25cc1af6616da209f4173ff. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:09:51Z), 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/GBARL2301800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642a486d5f70f141b6036040c97b41ffc1c4dac48968ae67d7d091b4fa4fd13b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBARL2301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d5dc08f90ae7e6d21ad2c47765e8543ee87be8a844c5cdfa64316c70b6a4bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKXN22312471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d50650be8998d34eb29e9f1d8172a6654dcf725997d20528d27550ac6d56ef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLFP2318020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643cb1206ab7a7a26c016cef9ea07ba572a23e3dd1621752e3da6a9386f1c4d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKXN22118908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643cb1206ab7a7a26c016cef9ea07ba572a23e3dd1621752e3da6a9386f1c4d1. 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/UKXN22118908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aecc90f19ee880226f3717cf68a00526e9a78642d0d939e6d2b9e21eafc13a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB45A2202952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124715d6eef08ccfc5995a484d97f84301523de4836ffc0bf06527f683be45fe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB45A2202909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8db1be90c58b674757543e90e6cac982a285156099e3bfd1d343188f216a96. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GB45A2202954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3446bd9d0956d5986dfb015ff1ecb3d92315416e4a207ee25c53122c7c669d85. 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/GB45A2202955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8db1be90c58b674757543e90e6cac982a285156099e3bfd1d343188f216a96. 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/GB45A2202954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124715d6eef08ccfc5995a484d97f84301523de4836ffc0bf06527f683be45fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB45A2202909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20b2f1e242a3a479500edbbe9e95151a8061ddb1cecba6f3e5ac04c3c2507f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USZXT2351808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dfe39e12e1a293e33c0f5a001b61b9b573a290901fd9ce03da411885825f71. 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/GBLFP2417402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dfe39e12e1a293e33c0f5a001b61b9b573a290901fd9ce03da411885825f71. 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/GBLFP2417402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954adcf4fd4ffc188991ac4170b6d044575ebdecced96db22f7a60a8f232a076. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX3Q92429605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cf38b5e29ff1d6a7885f3245935c5530bb618c08252c856a43c126c08c2958. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX3Q92389535.