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 0xc02d8ece5c8ca0a632e6102f2610d381bf866e8c68a307555164a9c8a3c47a24. 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/70a6adf7-f6a7-4b0a-854e-82b94e59e2b1.json and https://artists.proofprofile.net/proofs/artist/70a6adf7-f6a7-4b0a-854e-82b94e59e2b1.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 0x18ffcf8bdcc271817a6825f770712c4c332521ed7f23204073ffa4a92e9a53f2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEHC20944678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07065cb9bef1eb7a795dd82971063ed6453e677533597e6816f5549bd3427b34. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEHC20944679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbddcebb70e064a82e7cb49a312f11fd1eccc0cf4e04e886420ce4977716dd0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEHC20944680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc097e8db70b8aa8b19c0cf379f353e5e45b8666a2a2390e15446ac53ab58c906. 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/DEHC20944681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90b630b0ed2aac19ffcf6476bf97195680465e0678c6670879ecb22d35d8fb5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEHC20944682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25eda5e9e649aa24a795498d8c0d0450c295e8cc850c61d654ce2274fc500d3. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DEHC20944683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde26ebc7c35e4377c5d06c6942b3f20a481729b386b8f016450679b9f33a4307. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEHC20944684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc95960eeb8bddc6295515e1f131fb9e48d061966e5688a0c1116db9f0bd5e66. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DEHC20944685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dca0d862b2a8ebee8e79f5c5e547d8e664feac4710cd36a644b4e00d463476. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/DEHC20944686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c86cb3241efd1b2d8938ca51921f968f95ca579a66b7e9d1057493a2d299b5. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEHC20944687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5343520d035467c28450e0a63eb49e6744ba9ff44deb6aebeacbd7b10b06fb8. 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/DEHC20944688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ba6e4b9942b2c2c58f54a61e0668506a25bf5894e38178c191af75261c612. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEHC20944689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7191b53b6dcafcc3bad6bbec601c3d5ecdd2ba537fd499cf86d75e64a7ee7a. 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/DEHC20944690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc6458a2dcf2342e5c58c2b40c64096723eb14d8bbc2ac5e8237eab2543cbf. 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/DEHC20944691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f67a85857777eb5d3669d834f356a6ee1fe71191e379e7f159e18cce35dd1. 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/DEHC20944692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64950a5dc19948fa1f69ae0327b78a6a7e9ea97ecc2d5a410a2875d158781ae3. 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/DEHC20944693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d51e6da905c5f471ee60d9ecdb8247ed2660aefccb825c82813e15f37ae0d9. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DEHC20944694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2ce6059a8af7f8621c96c92f349376c6cdb6e771c3f982e77e5a4c07fb1779. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEHC20944695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8fe8401a063582a4138fb7045efee146f46a826adecc3e1af0fb9d53f9b54c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEHC20944696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416333216af2beeb8928f59faf03d0cff9bed510fd29c8abc156e147d9d2a4e7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEHC20944697.