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 0x94e28b1a488a839b5f77c0cd3a05d9077a8d8dc77c68140ef9bf77ca46b2b7c1. 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/c3638cab-78d4-4f5d-bd98-cd5b63c12abc.json and https://artists.proofprofile.net/proofs/artist/c3638cab-78d4-4f5d-bd98-cd5b63c12abc.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 0x5ff4a878373a77d9fcdb1092ebee32d440754a04ccbdbff1d9b74da112469914. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QM4TW1757882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bd1950100404468504264e739b11ac98a7e3343385c5e40c64de5a48914328. 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/QM4TW1757886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a4d5b52519faa775825fae19e917685b45733bee5b0b232e18720f13a7ae86. 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/QMLXE1330424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd431657d0ed5b1f7bd723e8969691b62227bf198af9b82272909cef2bb569b3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMLXE1330425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe442567620e44549edf2ce468aa6cef7099b3a4e1fc3277a7fc5deb646ffd87. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QMLXE1330426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fce28578d3bd39ab241285ff71f9c625c90dea68bd21cd6dd4ed42ffd5b0f11. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMLXE1330428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ffdc9f0f3fa079e8c67b6e0f43bad4b6867ba7d222a58d833ed03fd35af822. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMLXE1330429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e9aa2339904e93d76a5913b429998e91485aadc9a708caafdf3c96c0204d66. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMLXE1330430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fe1951365f06a2bde11220a6aefa2c6c3347fa98575fd3a7db7a799bf7905d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QMLXE1330434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae80248486aeba67b2db7fdd90ed156265c74a123dedd3c1a716cd4cbe416b3c. 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/QMLXE1330435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e00f5a792bf9b043a29562347ae99b9c14a4b4075087a96b5516cfa2d626967. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMLXE1330388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e653216a84708ac6bbf73ed985c42e32f5410ca07fd9a121304b450a68d72f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMLXE1330389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec432cf529859fb11781aa9f157309c78c58d4a9eca9853cf199ec71f5194ad4. 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/QMLXE1330390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc897eab6726ed5a389f4a76f4817684670aa06f0c5b5bf53c951d59cd82f557c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMLXE1330391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7607e109ed1a333daf10544f809d4951a12fd86dc6e998fe76ca89e9466e6b73. 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/QMLXE1330392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd97f2969144287f8d90ed51b18c3819d44c2991ccae03765473a30c4692ac6. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QMLXE1330393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5869c41dcb850500273b1d06e24feca2994bf5a4cad9967b376a54a2a979d5b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMLXE1330394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9480000c985f59fcfb6efa01441343f4a910b4f7a35ebec884f51668336fdc. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMLXE1330395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ea965215b3a27149ed5110d6eab15b9f4f19f2b300e000905614470d3fd905. 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/QMLXE1330396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d53884245eb19b5960e1f0ec0400b58346f971501550f4253cc615b561341b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QMLXE1330398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6c45f2d4d6a8c6f18b51e3155738e278c2057a144136a64ef8cf707b6eb72c. 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/QMLXE1330399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f223f1b4dc4d237452cfbe2cc70bd5b9debcda4df4f32e13bf21e0d4560bae7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/ARC572003040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67610a5fcd0050c7011048395789c2106c0885a1df5626798abdfadd500dea0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ARC572003042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534161e1646bfc5319b0f4cff9c705dfa3e655ec6010f3582ace9383e9bc8cc3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARC572004363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1f434199454ee57c0a1f18cee089f19978b61ccd5331611defb55ec3c50e9b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ARC572004364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c229be4a8465c216a22dbb00a3b4ba5adb050ddd8e1fa92fd38c2f9ee7f5b7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARC572004365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2dbfde143d05b3c9ce359d801dcbc602790b69eaa96f860a969684f4e78b59. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ARC572004366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec68e41122665e7a75ee4b089bcee19fbb446dc0a19769aabc49ac78cddf3db2. 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/ARC572103339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3e666633ffaf3d27254ace1436f8aaebce0242fe265eeb21e23b8c78977c33. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZNFJ2207827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda0811103635dadf9a447ce5d2ea80316ae8933b765eda7986e2608b62c62ee. 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/ARC572400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da294ab9d0257256c327a6231043090ef203e3ddec0adcd0f7826f774a9e751. 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/ARC572400544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe032e3d5b3902a85b82df82143e9c12461973996638dff12ea091f7fbc676437. 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/ARC572400545.