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 0xe38182d2144d80fbc7fdbc1c06785e11b1d9ea1b2aa7d825a831ddad7ff8501b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61c3efb6-fae7-4331-be9d-df48cdaa5dae.json and https://artists.proofprofile.net/proofs/artist/61c3efb6-fae7-4331-be9d-df48cdaa5dae.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 0xd97879a525e7bc343005876c000288eba30c2af98af306b48015ab673dcf8901. 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/QZES91802240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b78b4439e51ac5ad11d9dcacc8297a7a760a39987ccaddbdb365dd7b648f87. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZES91802242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f6cbe3a99a898893acd5aa32464be30f592d1b3db92072362cb22b2b4343f. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZES91817978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6310e9eb2cd667175d638b0903eda55d858c13d61d5a8fdff962c4e0944c100a. 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/QZDA71990760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b05c56f9335303f1717b16df7138fd821046698a4ec262953cd8f4be3434f. 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/QZFZ61909497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b01cec4071d5466ffd358a7e8e0c5ec213933bbd4c0863674fd6f4b013a60c. 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/QZFZ61909493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaebfb4e3079035b273d30e73a9744b39ab0a94f6145fdd5a294d75ed4ee1ad5. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ61909495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fc92db9a86ebf33f5fd7c9299d40736e47264dd165fd9fe4f71b391bffb65f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZFZ61909498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a4491cce7b5d46775fd9e35f298126b323fd43347110ffa7e31cf3010ef01. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZFZ61909499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daa4ac9224a9315a2bf559467b1438d9c17e6f9295ad397c076bc10fbc0885f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:31Z), 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/QZHN31948451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc257a966c146a6fa2cd0c6dc9d137c5ab8209ac2ddd99f73a27c0f1f7de0cab. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:32Z), 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/QZK6Q1997043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb805f67898482afd5a9174e41a6f2b249f3b306ee48a964d26a9e6eda03197bb. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:21:42Z), 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/QZFZ52088073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4b08d61b83e6b46d4e82e2d5fc6f6154ac1f620819cebdfa9397d64b5416f7. 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/QZHNC2030558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14919fff56db3ec9c95c1b9d9af849a060474ecf5538cd4dd39b394425dac78f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:47:52Z), 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/QZHNC2030559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919d3ac37a4c7a0cfefef27f7f12eae067d47e8143ed0e61d2f16bb7bbc747e5. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZHNC2030560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a776c42188883030c1b05996d874f3e148a54efda4ef8d3d06b31149611bd4. 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/QZHNC2030568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe967c4c3de5351085bc6557fb233fd67f3b6e3b16b4ec5992909eb4c6f3be90b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHNC2030569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc871138fee36248895e15024d9ae4ecf96bfc776ce598e2d5b34282a2952c6. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZFZ22116174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4eafeaf6283ee9b4b3b128454033505faedb8fe17cd643aa4288e0ac8be99c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QM4TW2255970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07efd1cb7f1246901f031004b23e1c51adf0a7b2fbc15a7f4aa6157f76d2f2b8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:23:01Z), 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/QMDA72143544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6798d0370121c3eccb1dd9579bf269ab4f3e9b6c823050c1c67ef325ff0a26. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:25:18Z), 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/QM4TW2255976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88d94d0fed44ef19b5673b07227bdfe2f8d0c4a065d4117ed7dd884e26ecc12. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:09:44Z), 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/QM4TW2255978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ec996d34549c8127db2c7ef38c1a4368c8d57e7f0a47a779cc61b7151728ac. 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/QM4TW2255979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90be9c138db08aab1187a6ffd859dae8311393281666fbd209af5882fa3c8501. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2255980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901ffe12edf05de6e965959ed3929a9d3949d8c6e65ada7b53fb6da6a59c71a3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ9452300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc360c6aa23b785e87a327931f313a2e13ea85126c487a9da908a267f4ddf5f63. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:51Z), 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/QZ9452300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d4bd43ffd05669f0b15906be41e1efbe675cf12c9ae550cc4b0d6f42aeac2. 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/GBWUL2430010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d548e47d5a30b2efddf320439cc0336c6219ad3aa398c7db51fcbaba54dc78. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM24S2102559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6297091bb817157c676e498e24e2fe1738c214b73e39b396fab4eb95a2a8b1a4. 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/QMFME2178258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c2399ec25e6179a407af2a9c7b8366ab1588a27621ca4ca4e305709951882. 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/QZTB62274535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39edb8e3529983e2b96b5cca1c921f7f7ce0de4ac20000445ce2095a3e352c2f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2106113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b521a0ec6cd2bba50a76c80f9484f8db5f360421b423a60a35ae869532eca74. 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/CAUM82200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e673e5aa316259b0ec059b1ff160b4debf8e9389cf8f9d8469b5e504294b94. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZQAY2292781.