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 0x08766d62193c461ed32f5de24eac1bbac09e106bb7f336c4666c8ac4b78fc1db. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b41f04d4-bac3-467e-b2cf-027ac142ebea.json and https://artists.proofprofile.net/proofs/artist/b41f04d4-bac3-467e-b2cf-027ac142ebea.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 0xa19871c66aa51795310c7ea80cf17842fae20f90027a2e31f5ad593633f1367c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZMEM2039447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6507d0b60d5ccc915a7f8c3ac6d8d0738d1d12f2a00f1d0bf30bda10b566d6dd. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:34Z), 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/QZMEM2039448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cefaa00619d966c133debdd5f9be07b58427f29b28edb5d3d45b3d7cb9764a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEM2039449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425052fc2b33ff41a41dbcaad5cfec19efaf2b991838b4449b7957a158c921e7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZMEM2039450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e4ebea9c50db903b1e81e4f11a39f38af582d4cd878e92826e9f645f74d26f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:03:48Z), 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/QZMEM2039452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5759263cff07659faca7e4696bc1926b661ec14aa4987a76f53f14a4056397f9. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZMEM2039453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d95a26513364dec84e8c2069f4d8710274d6bda6f1c1cfa5caa79187deeb17f. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZMEM2039454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b2e9447620fa347b7b2f332c5b68b3dc6c1d580567a0f886ba28321e4162f9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:25Z), 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/QZMEM2039456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201137cb8c9dc35f87a3fcc5e5c623639f63dce6b364d5eddc5f602f6f1e314d. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:07:48Z), 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/QZTBC2452975.