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 0xb32460f7ebcbacb97c38013019e5bcc4be07873db845734357f4eb8cf3e00337. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b37b1769-518c-4cbe-a152-b8ad8c6d8d99.json and https://artists.proofprofile.net/proofs/artist/b37b1769-518c-4cbe-a152-b8ad8c6d8d99.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 0xd3f317fcf57a95257d50e1ea9dd8d0be1080fd55af5424dda95b70e213b52491. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6M2263201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c4abd534474c2a0ec7c77465984a9fff99593a5522af731a3e8155fb2b387b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6M2263203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a42d733e8f0ce6ce0d7468d9016b69ad1faf39efa729068bb86281b3612fe75. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6M2263206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863b7b4945f563a18801d295eb3fe3dc2801edf8528486f2b39308fd570ca455. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6M2263207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4a2bc4457a7df5b6e1986176b2ded31169a48902d73ceeb6ea62cc1e9fe4a9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNMZ2222717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e4673c3f482568fcb54db4c6ed10a7d822207d8f0885f1bf437c5ea4a39ea4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNMZ2222718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb36e82154cb4ee9674a85523c0773386cd310e49f0405c3b4435c0c024c4f2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNMZ2253722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2960529a1cb0f6f8ad86efc27674e09bd7d12a426c78c611b173584de85d92cc. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZNMZ2222722.
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 0x24f38b468975d859fcb951aa39093adb0862c8b567cf99b6616e3e8489e96db2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEB1939775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00daaacc977062277bfbe2a762ef960783a45c220621b0371b6c54b9cb1583d5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCAEB1939791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceac018e9eb11756007f186c96969fc4ead1aa6bdb86b5d06df33d34ed0fb162. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TCAEB1939825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9c59672943e59ff8cf93f4e0d65f7ceb792993457e7a2635f45d38410faf71. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TCAEB1939835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd84998fab5bb30a57196c36be6730900c37c862c7faf50790d2a3eaed8a33f2. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:00:00Z), 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/TCAEB1939861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd236bde579c55493872640763355789ede253ccca1f1ceafb9f220b7dd4872. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCAEB1945980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56233eb09a28f893bab1645a3e12a585b666caa3ef2ab2b572b57debc9f03ed. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAEB1939732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7271f98f08df92f48e04069f542b7747abb75ed4121de816953b17429ca4a7fa. 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/QZFZ52184081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2136260ff2ca5ff86f342a99aa7d026699aa1f6aa13ce16f1bc0abe1a43bdf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ52184084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca493adfd04bc3176f5e476b22c42b709276bb24fb0ede1a9bd49fb18501d4cc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:50:37Z), 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/QZFZ52184085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec51d726a3668b4078fb74cdcdbd3d251c3a34daa720e4d48c146e61075cb8c8. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZFZ52184077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cedb57b03354953163de92547548eab42613a55d6971d7063f6c2c8621dd954. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZFZ52184078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b236f4caac45fe563718d02b2f22c4c6dcc25afcb2eb309aeab6bd1129df7db. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFZ52184079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfff901752b63e73eaaaa260837c8803f7088be5cbb8f95c7d651a64e400fa0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNB82015092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd93f38c666b7827a31704a25264321d3f00b0becb5d298932813a31f954e9e8. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZNN22391708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7ee76aafc4057d81dc4c8934f1da0ce2df20e4d2359ba4c1b9646e756771a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZL382455218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7073f3fc785b5d6325d621a3e8eff2df39da8e3e8ccfcd0d8b1af80f8c564636. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZL382455219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7e4338e0f8ac63d9c5f77c7ec32d76c3648d5914aaac69674a5f059a08368. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZL382455220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e54c5864a6ec64e6637dd97128e186979aacc8945c50f627d070375a37c05. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNN22364152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccdc51f6ed06f72f9438fb9ace04d584dda44e2e5fe0268202b46810deb5558. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNN32309020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776e89f9feab0114002e0c2d62513b83ebe4feca83d31c81b5ff178162d63133. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZL382455221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeeecb4ba002612db978529a3f9504a75ce9341ab39af72684673756e1ea47f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZL382455222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648c9a9818c51466eec9b9a660fb6e35d482b8f4c6090c60b763ebba0f2a649a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZL382450427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0f38ff5b2e9dcb6eb2aed22d23b874448c1090c50c11b5338b7ed248480d90. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZL382455224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea591af04fa98d5303a11ddfd230f2ae6bd962a9dd9c024d4f942e9d43bd206. 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/QZNMU2105372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea967c217dee33a3886670d63494fb4f51faf8f3190308b2a10ab9042c658e. 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/QZNMU2105373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e3500cbdd3ac8cff89b54986fba9ccf179774775d4c6a842a18317772c9d25. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMEV2044552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6336c2fde7aba307d94a1ad71abacb0c66ed107da47fa1799f6c34ea2612d871. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZMEV2044553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4085882ac46b74642e02d114a3a93121ad858d09f512502350270191da151a1b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMEV2044554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f5fa1a75ace9e41572e7dc246d9b6bbf474a5f8645e6bc43b8d2dbdb8bd312. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6J2281487.