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 0xd94c972348d66795082da40634abc6e36e492d601d460d7a3151125e8cc4c98e. 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/b237df6c-e5ed-4dc3-9a2a-953eefca45fc.json and https://artists.proofprofile.net/proofs/artist/b237df6c-e5ed-4dc3-9a2a-953eefca45fc.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 0xf9ddd0d0c6651599b0e9c32a2a6d095e9c1aabe6dd03fc5adcba18d9081f7a0f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN82011208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cfe5fddef50ae8cb6bfec79132e1b0fa3cd73651ced9aa6c7e9f104f387fe5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TRBUL2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e5ae16960f38538864f03b0dcd6fb547cbdc38e0b43109b13bade79db20901. 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/TRBUL2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cb5b6b5c6a7463dccca4eb63bf79847072155d5c4b3b3386110b0274e80ad2. 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/TRBUL2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014841dd80616cb8e2105a1f830a2866364f6a4088d45b1263eb0df43caf180. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TRBUL2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9968ba379ce80a60af5a05aec867b38086a0b726fc7a1e3d58817d85d28c6905. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:30:50Z), 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/QZSYP2398146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dcbc3a3420f0901919994b4ae52460d260526e10c6af24f1388e331cca7fef. 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/TR0532315540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e3327eff2007414dc2f72c2641bd51ae9270eac23fbb772d518125f0f80b95. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR0532315600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7eecc870d8830b2e25a0192a39ee8d1b42c070c96fd9a54270411a0a3943d7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TRBDY2466205.