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 0x41edf10a74d11cf1c0287a3d7c6a5baabf6d586ee4c33ac25f354e6367249c8c. 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/ba97b370-7a73-49bd-bfe2-e87c45a17037.json and https://artists.proofprofile.net/proofs/artist/ba97b370-7a73-49bd-bfe2-e87c45a17037.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 0xedb27988bd022d1b142ed4500d1e761249f6b37a998baea29b7d3587179ff459. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZARB1896073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e26d27f767fbd236e8e05139879d466e40aa50e8135ab02fc88fc65dbef4d8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM4DW1846547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc698975f541a788924a36e2603c5105e86ce6dfe9eec077bdf80141ae160c316. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM4DW1846548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaffccb99a1f499c1a6e7733f5ad69c6d622f61ca4e0e075f5640c70c93484f. 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/QZDA61822817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc629d81e1750e1e09944531d4d971a8bafab13faba10623a019613618a598a27. 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/QZDA71851594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c382846066f11a6a4b2bad35b6125f26feb6936b872c2c3ef580c09c60e961b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMPKX1894299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d259458bdceab483c249a60b8575c9d60bdbd6023a56ac4d4b110d3ed6b7954. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UST8K1871418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc80f5a4a4756b9528bd93c5d6b8316583f1ead96198a0233dd08b1e2de1ebd0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:20Z), 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/QZDA51947749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a342506e09886e899ca4ce06f4ca8d91ec1d2a28d9be7e78e67763576591aac. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES51942145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66361b544a6e3cffdee0735cbbfd084d66eaf43737934ed1a0e27a170ef0cde0. 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/QZDA41982843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fc1e259f53af2c384add89b95d509da20319df64e2ebcbe30a83db3bec7e32. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA61963043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a355882a0050d4478be6bc3df80fb4ccbeb8fbb67eae78d6b710c0f90dafa4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES81930794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64e0719dc8fd12a0c68262af13faee6bc1468668c7500c2f0f8bb1f2193ef18. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYY1994424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ce9bd7f078eab15d933c1ec3a462dacb2c103ebcd49d89b418b2f41c622034. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2092264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d23e9aef92122d08ff6d206819cb9de229ded78e1df219968f54e71323ed7ae. 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/QZVEM2344382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f9d29da86d7bcca78f43459521e0fa8c9601308abd1d266a92c2b8733ddaa6. 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/QZPEW2454593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a00d7dfb65c6fe723e033a0308479e83706ee39a331bcde485b55f79c18174. 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/QZPEW2454595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716d4e2b1c34e86b847b0ee05131267ad6227f39cad46e92a0a003ef7cb78ca2. 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/QZPEW2454596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347d2bcab94c602dfcc3a01e608876b5f96dcfb821fc7045143b946458078f09. 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/QZPEW2454597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb582f1ef8ff978a8082905e4a44aa0818a83746136fe92eae66d186b42775fc5. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZPEW2454598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5dce4483b5bf42135bb77df509b8342e1947acfa10a5434da4130e8ed03f51. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPEW2454600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8586d3e9b63dfb2b95ffb82032820b5572d9b4514b2e019226c8bb1a776b70. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZPEW2454603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953b0f25a711ada416fe848fb057fab19a0f8b1b2a95d061ff460a63fb6f4aa9. 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/QZPEW2454604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeabcedcc24bad31cfdad56e2ea40aa6e72d2ec48cfc31cff235d8467dee0e76. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:39Z), 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/QT2VB2419300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9dcdff9f8b914ba1591bd47388bf57ccedfb24a86df395748cb8026bf8ef82. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QT2VB2441305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc39c944324485beabc87681a3d77bf2f3c213062363afa1fe007e1a5ef5a312. 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/QT2VB2441306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da55155165b50253c89998bbdb6e75e59411d4b16d5992466fc96c26f712726. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K1996913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95960ae50603dc1ad5745bc171d6c43dba6c21dfa674a7134cc87f62ef453b9e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA61865235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a996b1efb735ffdfda928defaa995bf6f47f4a3d694a546c8385067de8a5c5b. 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/QZES82209034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679da87a5663305d2dae4b43acdb42cdf175a0c8d2577b5b81024eafe7a0e031. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ41915033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc178c0adf6cf02b60469c1d6c2f78a818f751b8bcd7daaf8b579bafe69f5a71. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFE2048891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5366a53a287cd0a2776ea5200cc4d61a7b24c88b8c3c114f87b2c86f9ff65aeb. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZFYW1920338.
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