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 0xcbb0106f8a0a8801841721bbd2574382f5beb4a2a6f51808656ac2b267532c47. 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/fde8b314-5556-4518-b4ca-2507b9cd8c1d.json and https://artists.proofprofile.net/proofs/artist/fde8b314-5556-4518-b4ca-2507b9cd8c1d.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 0x6de48f5ef30473fa44eedf1174cad0f4354bac9e1c5cbe7b4e5af0ca55a54747. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZTB22433349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459dccc1a654cb919174c7dbfef59eaea853b51b9ab107aa48289c9df55a20cf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB22433350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb323b83e49d91dacab4fb42c08103c887acd34765e6bdd70cb9bae384db34d6. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/QZTB22433351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfba665f4cfd9f0cc16c370a3a88d6840e95eab3310f91351482291c33b58a0b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTB22433352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ad40ed5cb436fa0af876b04d0f26879d45291f316ee41bd2ef746fd1a3f7b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTB22433353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084a49db247b8d2a4e08e8f798bd31c1605c53b165ed523fa32c33796ba1c7a0. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:44:09Z), 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/QZWFK2482996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4aaf1ba864c9e4cf2d5b2a01914554834174f5c5d937e4ee1fc17717781fe5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFK2482997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5904d67fc3163411e6281fee1fd472b75c0ac9cebb8037fc1dceea3dc6549362. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:26:47Z), 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/QZWFK2482998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2023f50e1be195cf354efaaf461a3472273d18b1db231db451bc4961a2efdc99. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFK2482999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb9b2aebe2a886d58df1403c2482cccfb1b8812c2c4fcd52cf8b47deb2bbff0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFK2483000.