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 0xc968f3150fee085e4d1243e7e7089ff5841860539fb6692f92499be65e29bdef. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1c6d72f-029d-416c-ad27-6f4442ba31c5.json and https://artists.proofprofile.net/proofs/artist/b1c6d72f-029d-416c-ad27-6f4442ba31c5.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 0x3d3072a4949dad31132fa23ceae7f9032b55d1f8867bccc8f45b6915b664ff59. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM3DF2253027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4cd98bd93ec9f4b006d1ba050c88a80d5bad0b43cead927c224918d2f8e643. 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/QM3DF2253029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7693124d40fd4c0113cdc4427d2adc287b5c545a239eedcde9934bc0685b858a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/AUGBT2429283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000ff5b61d0e4b931eda8f1a0ea13d9891673d3bb9414c0742955445dc5e77ab. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/AUGBT2429287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6d03a23ec1e98bd2d7a18434281bc4ed5b1a360b64268edf49caf916de77c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ762420909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caee97a1951334c8ad11fa67cde7234d35f00fd4e8f8f0f3230aa73ea489eb7. 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/QZZ762420910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299b946f5847cd5550799e618421988e97b5cd0f8b13a6cd7351997c59e551ba. 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/QZZ762420911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289b0cc70e0f5d907bdb6d18b8a64b83a2c470525f01b457ca5df2279e62ec90. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE57V2502958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e93b931cfdb74d4f262e4b5343f0313bef176dab45d8b5d91a56f9a326d5e7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:58Z), 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/SE57V2502959.