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 0x82001144b2b33f64435295ee2453d564a5a4c3365efc46cf7590ddfaf9c14099. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7aeb491-28d9-47d4-975d-f8d28b1b2299.json and https://artists.proofprofile.net/proofs/artist/c7aeb491-28d9-47d4-975d-f8d28b1b2299.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 0xcc4ea01e740cb5953a75ea173353c2920f52527fa7a54b89c5cf020e9081140d. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FRX762136888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22751fb824212b402143413cf0b7a130c92f704a424ac2f54ab072d8f4c34a12. 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/AROWP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cab313a740497a0003a1f6ee0773e2abd2955315cba0fb6b5a9bbbd63a7ba81. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/AROWP2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c5931f842d6e0549ff70416589a0f1aa177b07a882f3c39c07638eac40a27e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AROWP2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba81482dc3942d316632ddb69e73fad2582261ed91c21a32a2d887803fd6238b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AROWP2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a57e682f41e951e2f83e2aa80ef4f489b7f40329b423703ae100106e6c89665. 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/AROWP2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6e14f7c2b3bbe92e4e798e20383cacdc4b32b458f44be6a10ba6e71c6fead3. 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/AROWP2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf227d5601b8e27c14c8f4177c0ea5dd8a580ced841b45b70153d2b6ef75cbf40. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/AROWP2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87257c0af834a8aea3136be77ac641c13fee6930c41d1b24159ef85326df478e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/AROWP2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b22d8f07be800ea347ef079df4cead649fc973b6873f1f710682c85f7d9864. 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/AROWP2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689b0ba0c2ea1169acedfaa6ffb303976b0b359208bd9d6dbd5901765b0c948c. 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/AROWP2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819f74cb5358cfa575e2b5b3bd30b6d0d1c8a608e77095ca78360f67ddaad25. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/AROWP2500001.