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 0x1b6da97ca55389563a4329bb160b7006f991cd53734e92c3339e4ec713aed9ee. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3263661c-ba93-46bc-84a8-2c1c08ee340c.json and https://artists.proofprofile.net/proofs/artist/3263661c-ba93-46bc-84a8-2c1c08ee340c.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 0xf1b05062b890c6d98101a0cb6d5abc94e0e0d61152eca52834f99c03aa0dd92c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM91734613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65800d0cb360b89c28e96f3851b66b34155b555bbf173e6f9475f918c47619eb. 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/QZTBE2346911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f89b4a6fad36d4af0c496057cda06cc3debee7f4c6b9524bc933265cb2115. 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/QZTBE2346914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aee5708dba93a861df2dfa91dfe4557044d10994b994aa24bea6aa916a962c6. 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/QZTBE2346922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69fe1a5150bd46393692f333bd284cf21d6c7e48bbdfc076d3f80f48c94bd65. 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/QZZ7T2421220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac674a02e0c8729a5c7100685e1cdcf156bccf2fb8f9c288a9af46e7a14a4f42. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:27:11Z), 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/QZZ7T2421222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82118821f32cd0a4ffc127deac537450f52fea08739f9c42cd5cdd9910edd33a. 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/QZZ7T2421223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b039ccd8d9e5db073fd64a077b2b075e5feb46d3406c7065b158e6d8ae892a. 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/QZZ7T2421226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6b64cb7f390f56a40a549f773a0387f5db033d61d109da19e91d006db4f76b. 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/QZZ7T2421227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700796bfb75f988097aeff2ddfbd8adc074b427354e26c0adef67e45bec7c3c2. 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/QZZ7T2421228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eefd4b54a136b09c5068452181b0888c8ac3a671e4150b2a9dbee742e5a4e8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZZ7T2421229.