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 0x9a7c7036c780c861d7190925eae77b4d00227e0d65745cd9a94394f8b356ee1d. 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/171d231c-fe1e-410e-91e9-f2f8a93438d6.json and https://artists.proofprofile.net/proofs/artist/171d231c-fe1e-410e-91e9-f2f8a93438d6.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 0xfa2f0636be49e48614ae09f5af0d560d86ae93af5718c36e15fefe32c7461c74. 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/TCJPQ2118902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc867445e6ccb309a7ac745d8c611312b2af2d8413abd5bfdf14adb2c13c364a6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:01Z), 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/TCJPS2238977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9e953d4a274e78b9e417c735dfe3226cc53d25cbb55f877fe76e07648cebdb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPT2201179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647b3d55e3be3105957186e1b85e46c7b6873381446546e6ca9e03efa4913ab8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPPC02310899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafe9d26c0efe771c48967e27b85adc54b9a82bdcf4f7b97e035c8bea32541cf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:20:48Z), 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/TCJPX2360491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd87dbc872a64e809c9336d256504299c5f4b9b0bf6b19ef050f28ce6e09a6d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPB2447726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fae91da05b06d4c8b9a1e6fa1f060e702f4f71b8d0484fd02b3680f24c6377. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPH2530479.