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 0x9e89188cdd8d54763d81a4924fa0306e2696111603521d8d67ff46528123c2af. 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/398b78cc-1094-4265-a50b-78e5f5a40f7c.json and https://artists.proofprofile.net/proofs/artist/398b78cc-1094-4265-a50b-78e5f5a40f7c.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 0xd06a76a4761f0c464312eb786394e9e1bf689d3d0bc16ab44ab85956e65a6f29. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/SE6QE2073492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fe3574dd9e2463b62c1ca844c8ac2ef13a18eb1e6ae5ca03d6bc0d32202593. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/SE5752116023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95be9ac0e4afc2d7c9d5c7c68820123812008f17455a920f1a42149060283a2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:30:17Z), 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/SE6XW2197383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8580c27caf429ac1ac4d216065944cbe1a75b9610dd0f3a680bc276fbed7b0cc. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6XW2294952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f373f52d205f2aa9ffbf472536c501bc4171ffeffdde22c78e340f72242d22d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SE46E2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f5c6280b823e07bc31aea9dff038b0142daf3e515c8662435eb463f4f3f0bc. 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/SE46E2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb346db1e9ce76f14374928276bd3f158927b39963a7233698691bba53c753d14. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE46E2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1083621edefdf44b201b94b53c33c46ddd091928b5814d2f22aa360605a2f50a. 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/SE46E2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd191fc14be73d8c3d460cd8035797361a615778c75c0e3bb31c58dc123e69af. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE46E2301202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef87010bc350375da1cff67b49418278ba2bb80a602d0a7bf444f7bddb50f52. 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/SE46E2301203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33935c0738b0f7d57b95f7728e1252e776aa1009ea0247d8d5f9239a9f07de5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE46E2400502.