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 0xae0ec5272d4d78d8862b1d2fcd6523fc8a5351d86de4d07c941460adac93a5b6. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fef550f-bcae-4617-a0d8-84ada587f1b5.json and https://artists.proofprofile.net/proofs/artist/7fef550f-bcae-4617-a0d8-84ada587f1b5.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 0x4c4d488b1198b01145a3cb853d26700c71f580672050d3363658c13b8285b8e5. 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/GBSMU7759724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde26a368c5eea6829aceb778893d78c534d3539560a62569a045e5ebbf27e97. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZMEN2093290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c0557a9fe93daa8bd5ba6915440d7d8343a1ce5066b0c44bc7594d262450af. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZMEN2093291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6971e289a856888bb8903487559f7d7b2fcaa52e783c5708419219f67a108957. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZMEN2093292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2ff44c86ab3b85368232c75c6d6b33f8e8fb213b2487b777516d66ff6f4b35. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZMEN2093293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d5948ce41b6072006c26d995bf3adc29a12bd814f673d0bb2e27170ef63d83. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZMEN2093295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a5ebede5e3186b7b3145510066b1690b09ca1dc3cc1185bc0f5a60ebccd9f9. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZMEN2093296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bf289eb23dd093e8577544f4c52f20d97b2648b3899b2e469d6233b867c8b3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZMEN2093297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3308e40b6e4342447401fb620675f0e40bbcaf9bc0bbefde49805501a79f000a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMEN2093298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55814fc376062409e1653a302e0e969fcbd4ec89f9eb25959e51e4144edab949. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZMEN2093299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dd4fe513756e10c61f0aeb08ea6e46dfed9281c042f575f4bb32caa485515a. 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/QZMEN2093302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87446cf1f9804792f54e77c825fe226bfa4d4a5fcbb10d3864075390cadc2008. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZMEN2093303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eda11282c39607a2daefa96b82846618d06a49cb27f197ffdf1047cacb443ea. 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/QZMEN2093305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a8ccb3dfada352d0238f5fd6119e19dd5249ce1d936a41c1dfb821f5ebb488. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZES72268007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf1aaa03ffcff256b19bec84650b676afa408e7a7a29acf39c13ca35a52f54e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZRP42233502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb436f2a7732454019b11218b172fc860369437095ddedaf51dcfc83e244ff845. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZRP42233503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a0a2712a1d2bf68c1823ef8188c92237e6b3a4e0f15f862bff18b41c446b72. 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/QZRP42233504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f5181b87c7accacbc0953d25978498eb5ce1cb059298058195f9f48d68f614. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZRP42233505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccbcb2a074e7b1c2a216cab0440b4f7f45e065b5b46e79b024d6f3142e30fdb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZNWX2352243.