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 0xdb80d0d747b223e1208fdab6632e85c69909a5e16c956d197b20001c6104344e. 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/11e29f6f-4e70-4e7e-a192-94d7a30d41ef.json and https://artists.proofprofile.net/proofs/artist/11e29f6f-4e70-4e7e-a192-94d7a30d41ef.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 0xa42f9ec8c2c5f6161621325deaecaab1b836b4502b26a291bc1c94a6815c01ee. 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/DEKC41500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc7b597261ab7ac7e0bd422924b73d66be8855748d1ec2dee64b476981de917. 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/DEKC41500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4374e6bd05f1de1829b1818016916a79f671adb21b5c8b9c0961eaa8d8e6dc27. 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/DEKC41500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f1cc578e6d328e0c75204c5214f704e41b22e730ffd5959c1f083f7fefcdf8. 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/DEKC41500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e99287b9009dccfa47f84f588b68e97e951839ae3b52abca91524a65f321f3. 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/DEKC41500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96f414eb38a4914f8be7d4c85c63b04b84c095d6b8c3a5a3ef1e8857f1573a6. 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/DEKC41500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c055ad126792fd53e555fe78292af7bd079d142ed014c01e88f7e3bac904cb. 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/DEKC41500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194a04ec9c32fc3c39705ca55bbe1d3f5faa6139f8c0a7c8bf113d6bcd81b850. 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/DEKC41500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd2e5d72892615121f010cb94701324f2b0ea27dd98e08dfc64317c903c185. 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/DEKC41500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7076d0cefd8cde2234c7a7ff7ad726482f1c921e6fe3cd63b3ba1d39940e5390. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEKC41500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d6d8c1fa7dcd21a0da76be1fb166a910eea1e4ae6884a8738bbc3a25b34ad. 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/DEKC41500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01393b428a35d99e4864750818a72e9705a3daa8ec4168fb30adb96d65225f6. 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/DEKC41500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce54eb731547cc2e7bad02a41e2eaf9aa29c378976741d6bc8e1ca42bbd0def. 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/DEKC41500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3881682f5d7d3c72d59b99d6e1a9815b2021754941cae4c5094d5de88e92f8. 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/DEKC41000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe9ef8eef28fd12a4cdd960fc8d3673f839d3baf0fa2a29bad0d3a8525a3bf0. 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/DEKC41400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0bb9dcd1bd6bb8868c4eaf9aace336bef24c5cb7ea98bba074af74a8f355a6. 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/DEKC41200983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad6a0e7894dd4e7dc0f9fa12098037fa123401c477ab47d46be270762b10324. 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/DEKC41000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36829fe7396443bb9db8074a85a549d25262ed373c58cce80158beef6ac68123. 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/DEKC41100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1db5132c50d48562df21b07609752734ee06e41d896a74c4fe380df571c1f1. 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/DEKC41100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3de9aea15b410a3f4cdbf8f481452e32c8783eafeb74d2b69927f87c518659a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEKC41200969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58343b06f4db5caa59f353f918dc4cfbbf37eb445121b4c6726b2159dc0d450. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEKC41200986.
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 0xe01579f3f95f85485129aaa7332a0773ce3914e1820f105c9aedeea4fca89864. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEKC41300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7492a0bf8100e1a4f901736eabf92dfef1e2a4256e1f9aea0e6ad6d3bf11fafe. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEKC41400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279129759a9b0261ff86d5186d5073af6e5c559bf97b5e35e51f0df1bfebb71f. 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/DEKC41201026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83c5ee6115e395e9eb6aa00abe2344ee72c5e3dc9fbd3b68176d6349f115a5e. 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/DEKC41201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89272312565f516a5bc5e7416870f11ee496db3ebfb3c02e0406dfe37eb35b8a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEKC41100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3018c84cf5cacefc3aa34e88ccced0ed0cb1ace67bbdb95d2de67c3d0086cc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEKC41300025.