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 0x48dab5b870617114f89f67e6375c9ece015a87a70d3695e50d1bea0132da814c. 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/1470b58a-3b38-4431-b151-c6d3ad6ef498.json and https://artists.proofprofile.net/proofs/artist/1470b58a-3b38-4431-b151-c6d3ad6ef498.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 0x6eddb70c9d7ea8a72a6e756ddc63a99256d8841d0b5409014e99a1461b56dc82. 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/QM42K1701069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad012359469aea0fdf9bfc426b2b51cf895c2efe2bd78652ccabaac3644ce60c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM42K1701166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8ababaa6e46243f3c1dc07c0940cf017f706817c9d056a54f4bb16fc6d32e4. 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/QM42K1708847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6812b43dee2c2416699b6a251a65eda8a9c3f853d480feee867a56884fa27. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QM42K1708849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bf3739b2bb44be11703ca1d3f2bee870f90b3e279c8f6bdbdfec8b29b7d603. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM42K1708850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ee380487dc3edf7b0e49953e4ed5aeac78aeb46d41cffcb3182b146fb46e7a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM42K1703077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c855ea0df2d719a95810e4033576287fb9d959e673a34a2d48b05f19a381065. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QM42K1774875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993590f66b2fb1c30ac117794f215639a713623dbfe2889109b7153dad188df2. 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/QM42K1778096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391206806e6b8da2703b5f5f6be4a172cee0c358734010706b8ac03ee279c2bd. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEQ022116331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc144f68f6f01dd25d8d385182d998da62c7e2b733f7668413396db8077c147. 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/QZTAZ2368278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3a07e44eeed88d2ab22a5af32ce29586c0a09d3181d3fce54985803a1a8c80. 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/QZK6M2438612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382d8a31a4b180f30c1357a71810b68bda338d0b08f67a41a3a6b3e2b479a2d5. 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/CH7812417127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19678724e40d6c62e17171447f7e018c8e64bc3fd5a007374da7aaae378f17e1. 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/DGA0L2471736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1e6ba7286c2d76f0d6bbf5ffc047027a52603b9dfc70076b9705a6ac84683c. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/DGA0L2471732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c63781ef125d816ec752d6ff4239b8355dbabe99c069cb391a6188a049f844. 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/FXR592402262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa40e9f39bc5bfa839763cba3303c4e1923e0219efe413dba8e6da893e3d4d3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWQ2553071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a00d15430e2b94468693e30b0477e413f01395296e02c94c883a2291d4056dc. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZNWX2572797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb495de0c2e75b72dcec2ec05afb4449055c50fac7b3d6ec35f1220ff2f4d96. 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/FRX202523113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb13d1bf80bee2f98c464940b492caeced7dc337177e5b457637d93b1c4b290c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7U2584333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5ecad32887403d83480c6723cc7255664c86ecb60dddaa053f7205616e70c8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHN81996706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391103ac8962c448ee4536bc1931e6c5889c98fcb2a9e813d2f5424c0ef401db. 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/QZHN81996711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57077eb84c73f959767350170a43eb577d3223e7ce590be8ecd5ff145af7a8a5. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QM42K1704470.