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 0xd830f357a2985441863a7c4ae3f0ebe8ff48a03800055b849af5512aedef74bc. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65a59b97-b128-4531-b54f-a294c9ef28f9.json and https://artists.proofprofile.net/proofs/artist/65a59b97-b128-4531-b54f-a294c9ef28f9.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 0x683d4bcfd1d72c81d3aa3cda2dc74add9554ceaf7241ae2299947356d8a00727. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:01:09Z), 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/QZWFM2466136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8198726629a311842a4982852a048cc7d3770ab8e1f578c94170241abefc26ea. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZZ7W2456542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeb4753c04e2063e3f8fef008c34c00380975492e5dc31ee2e1581b00c5644c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ7W2456543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3063e893b4d8cfdcc171e601d9cacff4a5e99463bda7dec70e630371525cc992. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:52:38Z), 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/QZZ7W2456544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53382c74aeb115b4c3cdc4bdfbbb2ab273e1f9ac98d20efedcbaa9a3757edbc. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZZ7W2456546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa1ac245d1c3421b1a2ebc6523b038ce3970d05d76cfac9d96939b170294514. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:57:37Z), 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/QZZ7W2456547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b554003affe7b254af4bbda4f44535944a0a77346a2d893ac38fb0221f4649. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:57:09Z), 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/QZZ7W2456548.