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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1b2a9d1a9faf854f6aecfe4c5ce5bc152546aac0f529cf4268d3a82f7ff97e. 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/7f7c7d3b-3bc4-429a-9d14-8d7471885f7d.json and https://artists.proofprofile.net/proofs/artist/7f7c7d3b-3bc4-429a-9d14-8d7471885f7d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de73adb320b2191da657fe785f99238c356034e36737f59c4aba048ad8ba198. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZPLR2197423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54bc2e6c1c5a439d35323e6ce71f36141f246ab827b2e20b246f0a8da50a4ed. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FR59R2277899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa602585c1917ad49db9ffb0f311fbd093966d985ebec57ad905d63eca2ef34f. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/FR59R2277901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92195fc2a5b5423148eeb9cbfe0227e276dacab22f143652e09ec92aa240a6c1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR59R2277902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6d9251f7bc0d45ef735397cd6aee07d56c6c08e89a594bbd6fb6370ff43620. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/FR59R2277897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf193db796718dcb6672407b06ffe4ed271a7e845a6fb627478584df142a7e793. 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/FR59R2277898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54bc2e6c1c5a439d35323e6ce71f36141f246ab827b2e20b246f0a8da50a4ed. 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/FR59R2277899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567186da9d9709cc4f81dacb6624e90f0066853e29a3f047ec3713f460b229a7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR2X42321151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d3a38d5e6a0f882f23d5602c9b6f77ec1f88fed86ae804e6bb33c70fdf444b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX872302407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d3a38d5e6a0f882f23d5602c9b6f77ec1f88fed86ae804e6bb33c70fdf444b. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FRX872302407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a3feafe0e1ca1dc0b6a23966e4205fa8dc3eb5f1b1d3630f1d3cc4793fd22f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/NL8RL2426919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50649cd94c53aa198452dce3fd3e77b648e41489658f647cec5389e01f86054. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NL8RL2440310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30edfbc8a8442b6b6723390a90bb71cadcca7b44094fc0abf06f23541bf01db. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL8RL2501045.