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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366585e075f1636c1d0b036714793b0246c6368f8ba4aaa3a3ff2a88897888c0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46b076fb-336e-4b5f-baca-353d5beffc94.json and https://artists.proofprofile.net/proofs/artist/46b076fb-336e-4b5f-baca-353d5beffc94.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d48bea14333baf7becbe99afc834729835c4263cedccfe71cd80d9c8ad2e8f. 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/QZFZ42321716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae11883494a259fc894f8b58be697c5e78b3b4d61f14bf5d2881abcdbd8ba0a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ42321717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0667bf72e50962a19f826eaf647eeb6445a2b3274e77845891c78c177fb0bbe. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ42321718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8a5e38b705dd896110bfa4e0714608af2e6cb74eb0c0bf06fa1feb68f84055. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ42321719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea38cb71a9106c6a1e606c89bead012d2b1e83b8f0c5333d34eecdc940e99ab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6J2304223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961dd6f499df9f42777cf8891e8d969e38cfee7afd1d28c16d2b68b70290f0a4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6J2304224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284784d0ae6b1e415205457f5677d9a8fc3ee9e594151f91172b49baca4cda8a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6J2304225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685b34e9b8d8235730271908324524fdb448b22c8113f9df080de56fe569bbb0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZK6J2304226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf250ac1fde31d99050ce2e91e05534d2bdb1c0763e5516a8751fc2a1b52ea0ef. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZK6J2304227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85430514afda203de4f0441c95cc68cffb41cb37fee9003aa38cc0470a0109b3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWZ2325975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e5d90b2e2ec75fbe1a56b65ac5556f054004b80a5132f17979806afa54749a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFK2357566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5219543dff7b1dd7523a3509710eacf9f5632e8ef954e545276ad6063891825. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZWFK2357567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823857b4a95598f1bc6cf60e0f761ead03210cef2f8e48c6e0c1381cf05563cb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:09Z), 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/QZWFK2357568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338717f1c1d07ecf70bccb1d7f5ea14a30ac6d9d9328402c6dea6e43e869a722. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFK2357570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836841e42db4935bc9bc9ac3bd9b2b1e784e0e225ce216648be84c1812df0ad0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFK2357571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6abf6f3b588166b1f2012a3874a33f3dc08892e0ebe8e9398a3574dae7becd0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:55:25Z), 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/QZWFK2357572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24288df4365e229e6bf3791f2341897d3c3402c363751ab9f213a7e9864a6b02. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:41Z), 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/QZWFK2357573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607a38339b2170c28a48ea13c429bfbc6c4228a02d309b82c4d1d6ae7125ae8c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFK2357575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38918a6bcec87f85319c76e9df39a5940540948b987acc2d986a615e4b80bdc0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6M2405143.