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 0x0776d0adbe3dd5e57bac6a95f152e7177d6753862d811a5aa17a492e25559e78. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9b07d2a-9c23-40e5-94f0-1ad5b321408e.json and https://artists.proofprofile.net/proofs/artist/b9b07d2a-9c23-40e5-94f0-1ad5b321408e.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 0x4f5f7ef42711d9396d0538cd891208dcb9557b1e3bfe94a93d16bbcd6890f8f0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMHWY2100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0172ad6c420f41e9a5da0cd0c41a3c43188ffef3692a864bb905daf567f8e91. 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/QMHWY2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05588705886df81a17900a57a3d2e8cdcaf5d3bcd305867c385828181e27b6b8. 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/QMHWY2100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdabfee00c7cd07afb07a7b8342c526c504bb026fc595ab09171fb760586a8e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMHWY2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7131ade1dadfb9a7799686f72ed763dbb78b783181649b188d116554025f2567. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMHWY2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb552099fdb8c2eda9a0c61a5aeab28e2b15d6dc1ff27d562f9cc68d42286fc8. 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/QMHWY2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6274980e111cac7fda098a4f6f86e4f3285b40bc84057fe743a1dd093f85d850. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMHWY2100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874d2c08c1154d042cff281e5b68b271a60fb3bb8149bbcdde611f446c668b87. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QMHWY1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b3f59022882e213d61989d29cfe1573bcd6ea54138c1c943c76ca3ef7a8ad3. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QMHWY1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2422e932a8d89f01b25260850b46a3583a599308480a0e77e61af67ccd40e3f9. 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/QMHWY1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167b4c046ea50c042886ba3cb468a3f992bfe669964f78e9d1c716ace1a74aba. 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/QMHWY1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bada857361254f536b7127d4a1eab5ffcc908cd3ec210f23dafbead6532500. 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/QMHWY2100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b16f16af75e1c86c5f739581e1644771b74453bc0de99ea50e11ad57bb4dd76. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QMHWY2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0172ad6c420f41e9a5da0cd0c41a3c43188ffef3692a864bb905daf567f8e91. 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/QMHWY2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaefe2bd1f1d1faecc290b32db0a5c72267698da38abe5fd93b89cb843c32a0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZKYN2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60e6c3e72e06ee13354e9d40c7d775d68c9542457c47602ca37319b5ba0d53a. Chain 2 (Bitcoin): anchored in block 957210 (2026-07-08T18:28:05Z), 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/QZKYN2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4ff494977149dbe88d18a1553e16e28da523841b1b7c0a689966ed9ac7d58f. 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/QZKYN2300015.