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 0x567a0be243f453eeb6df87ede3720ba788a1590480af58dae6ee7e7052c647ea. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b49c5fa6-294c-4048-ad2c-6709ec24b5fa.json and https://artists.proofprofile.net/proofs/artist/b49c5fa6-294c-4048-ad2c-6709ec24b5fa.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 0x062c25c58f94657c9e8f04817aa90336856d571b15140072069636c9d9528e0a. 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/KRNAR1709729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e415bfe43584df3a6b94246c7c1b9bf08c76343a40fd0c1d38166cc36586fc. 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/KRNAR2234789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719d398c06ae807cf05da2105a83c8d0637d11dbd8cf3fefa7461ea86fa6bd36. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:51:04Z), 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/KRF632300732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dc4fb1fa1a32cb449de7e13be37e5d0b8ec2ddf09f008f99d6693274ad3f81. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:53:23Z), 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/KRNAR2341076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28df03c4f920d096923c0549a518bb072ec64b9dad50224ef0c5856c3eb67c86. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/KRMIM2429152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea02110e3779c6cb33c2c8dd441e093bd1fe6d5a675a14472d065080c0fb4b5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRMIM2420803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2348224d54c4cb0d3c811f64f9915626a895a0e34e83fa59d88a8531d806646c. 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/KRMIM2502729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7c60fc42355ffdf63754d5c2e9e011ed62b9c41fd40bd632f5a8f42d0dd739. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/KRMIM2516963.