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 0xd98d4f930bb862340908b450f8946316a7e90ef74c91a5d8ac9a14d040f21312. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a850714a-15b6-47b7-9ad0-30cd053278d8.json and https://artists.proofprofile.net/proofs/artist/a850714a-15b6-47b7-9ad0-30cd053278d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Patriarchy (Over & Out) / Wheel of Fortune
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 0xd7e46326caed746d0ff0ac3106c0e0375418c7c1f51acebae4b1a297bf1be90e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UK9C21800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ac7cafda9d3bd237cbe08e768ca5d7d4884c49bde3cf9b857ee319492be297. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UK9C21800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1260b86973a6f82150e5844c67ca34c17fd150e1caef10637d5823831870dc4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GB4FK1801378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1459f3b7b22a1a59af045a0c72edccb978cebae0d6fca3ce899e0b35001039. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEG932003893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2458fcaa5de0ac7456c8040997422c6bb338e7bb381ea9ff3da035c1a93a0b6e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEG932200853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ebda78900514c2dbdfeeb45cfc68bbd408bae4e4f1b13fa8f59af76fa92d56. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEG932200852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa9448d0336d264e23f9ed23e62d70ad645b9f9c25cd40a03be4d9f2484736. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBHLW2500824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff788703f1b12bdb28498d9d7e03208eeacc7b63d65e994671d03972dc9bb5d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GBHLW2500823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c357945f64751770cccdc118c181c844a4ff913cbfb34abfd9f7eb62e10596b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DEG932505232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a83f302d10056cf76bf7d0cbd6e28bc034a13c52fd81bda190c26d636ba71ff. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEF272133007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac39d841101ad1a1434702144a5f4dfb8d8a3452f9c0b6ef78225566d8fb5dbd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMBZ92316750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919247c341405f112c9eb5bb68073362fa6d087e50b52f5a265aebcc3e450a95. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/UKEEH2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a15a6605baca1c58e8468e95f1f867ad74cc94a840ebb58b5b6d1a0d2f7ea7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6MZ2104274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b8ffecc8ea7ce6fe57727081ad987cc0654739b2212c2822aea83a4f8550a1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEOE81800035.