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 0xc3b75a6fea942f5689923d098fd0734d30dd6645f792323c7aab60b4adb40823. 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/f754ae2a-187a-4ea6-aab9-d86296bf56ec.json and https://artists.proofprofile.net/proofs/artist/f754ae2a-187a-4ea6-aab9-d86296bf56ec.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 0x4e7b913a6193ec103699df5ee68404707dfcba5234df73856254ccaca41323b2. 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/ITI400800777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1624bded3cd465a977bd3ce5a0766fd2cd5dcad9c8178d12925c80160f1dbe4. 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/ITI400800778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0129f7df14a370ac06374539c0007789315215b7e76d95419b3930d49f42f67e. 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/ITI400800781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c83baff3c9ba39ff4422d6ba0650216def112892e364db67258e508cb9ff0e. 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/ITJ082200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8852b294f91db6345738c427b66f905e82fc4cd45131e50697228431715540f6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:16Z), 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/ITJ082200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7680012f81a7c2c6efbfb61e8d79d20563a5c098dc673ec1e309777067c25f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ITJ082200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233ddaedd2c3206e0b94a4a3f0510401cf1050a9147373c735b20c23694a75a. 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/ITJ082200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813960d2473510ae2caf23d1f2c0779281ac4e1a509a8fe452173fa6db42438a. 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/ITJ082200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2fc80d026245cb94d9808fb8458ef9bf95e29b1313c79eab4155641f1d9d4e. 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/IT7009608790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0405bc2062d18e348e14cc1497bc7840788943bba0ebb9174739ae4cc15d2816. 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/IT7009608810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2c24eb325f2dd136fc397fcd485f334c3f7ad18ffbff149f7b6f242e896e90. 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/IT7009608820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05301b493970684b6ba9834307a01383fc578a6881b53fc6b9715f40c777b5c. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/IT7009608880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7ae02ff2716c3963a305421686d908f0dab786d42b7e2b3aac6676a3965249. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/IT7009710220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19e19cf0dd685a2bb0e925d74b231bfceefad9a0beea7c4fb135e8a20d91f7b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ITUM72200360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a020e739bf33526a7b068b3a8b1e24400e38b10d8b9fbfdc291621e53d42f4. 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/ITUM72200364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3daf95e48124fd06e78767ac0ecf4923c0f1e3ce877a4cf173c71dbec3d3d9. 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/ITUM72200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6970d149ab544f4bde895962b7559548a0cc6b455e9b1e54783969ef2a544b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:06:35Z), 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/ITUM72200366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b85225833e5f81a4f5892193638f312c97c461736053145df415d53054cd143. 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/ITUM72200368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8acb8747c53459ce9bf623e75e12b84f6741fdff437fac364644870f3eae79. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:02:28Z), 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/IT7000100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41513dda87a24b9ecd1b04ac02b34137f65e835df390a8fcc7ccbfa518b09d3. 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/ITJ082200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d4ff328c370fb13a4fc8d677974daa98856eed266c56d16007558499973651. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:30:27Z), 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/ITJ082200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac8da6422f50b0dfcab13805af193933c40f9498d8339dfe6d3b7a3c3527125. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/ITJ082200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dd0e8a88dd734302325180a197ae273fc8a7aba06ee46d22d80fe25db37999. 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/ITJ082200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b07d38515218cf51c6df252ed7a4a3dc0e2824ad9f97fe76713d5488bcb311. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:20:51Z), 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/ITJ081000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a6454992edf274802e957df7ca16243f9204df3d01b9b192d39699857228a2. 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/ITJ081000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86479528893d6acc5557fea76fd77512df7e32b6a9e26c53dfd0bc62360091f8. 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/ITJ081000054.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341835cd4ead716519158a9e49facb1c59b79ff33a7648ce6b796f297ff09e92. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/ITJ082200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66331f7bc76aac5b8efc08f613022f5c791f3f3f604972d6ba7b6e769a57c2f6. 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/ITJ082200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836458b60fb658b7ff2e5704f749e2f960d95378e532dc58c158e16351c4d7c3. 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/ITJ082100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a50f6cfba7586786b697c2c94d90e1ade9baf0d8fec35f39d15ad38baf9410c. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/ITJ082200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d583280fc1b93ea3ce9afa3039c4bc1fe4acd53db4c6ca1c18ebbfe48d49269. 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/ITJ082200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a47d870d33e0c030a7af49301aefeccfcd5f0a84fd9d884b4a91881e47d88e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DGA062489467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b13d91f79f1a873423a6136750e29977eb9ba0fc754c3e4c56078bc6fce3ac. 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/ITC941602855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0b8a85cf73da754259cc3d3e58c2ef7564e24e94b60c0bb32925950316643. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITUM71100906.