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 0x88e10372a58c060b70d391e51876958ea4eb60f394ff06d6c9b390353aeba46c. 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/8bffa177-8b16-4bc8-80a9-1fede2d25cc3.json and https://artists.proofprofile.net/proofs/artist/8bffa177-8b16-4bc8-80a9-1fede2d25cc3.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 0xfe08af3dce5a5c862cea2c0757bd26e7d50f9a41aa8fc3e66a3b4d8d46a2bdfe. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:27Z), 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/GB8KE2312756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8ebfaf532903621c4e8b2a339e9d5743e2473e9cd366a8fbcb5282ca6ed883. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:23:05Z), 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/GB8KE2312758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37726a59c27f6a8d4ffe17c853c5ed266c0e238a97ceef5cebebed807871a64. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB62352599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f2c5dcd1e1f0bd70fd02683d465f32b4d9e8474b069050964d4117881295e7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:30Z), 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/QZHN62497567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcb4e4b3e593af6f9418ee7c5587bb8b2dadcb68ec52fb42e0863711b1a72c0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:05Z), 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/QZNWW2427208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bff7bdc03c47a9c430c6dc050358c7f98926a5d0e822151c62315ef0ba644b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNWW2427210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c4648aed7fe695c81964d778647fb06480a59d8eec9f21faf3dd4693ecd8f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62299145.