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 0x16b351e431022bc8175b1a4b17d402a394d79af29af0da9dc185c01f81c39bd6. 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/d59462d3-c957-4e9d-9959-55ff84525a9c.json and https://artists.proofprofile.net/proofs/artist/d59462d3-c957-4e9d-9959-55ff84525a9c.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 0xe5b725d5a2aff7474e9d96b998cf8c6428c51e4fa36a38d96f32d54116a6d371. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNJZ2224796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae91c652497a70eeb0cb06558748a85e67382693ce3fca0b09d7d9db734769c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QMWZB1610375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3009aaf2c80a0f86c86392e12d87122bcd67fa6d85cc6ce69fd3407a8d8b9be0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX201666425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de0c103d951c85ad87a48e3e167a646becf2d9df0395aa68138c3a4c2dba478. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR1907426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc471e7566fc51e62ee9c817fb4efe411e5de2fffbf738db60d4fee23bb5a8518. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA5KR2033774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53519808fecc4887959e8ebb9d16cf4e9e5010c42f3e2617bdbd648689a91beb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAHW2416801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b0fe345ca41a46b25881ebbcec18259cbf8d201a0c0bc40548f61756366a84. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/TCAID2416177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201ca3da21f69ade48039b61133af7c812b91f6deb6bd40cdd313f397e0dcdcd. 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/TCAID2416182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ea0f9eaaa01e2277a7d303c203a130e0e2b47ed1a3b6099d418bebce6d4268. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T10:59:41Z), 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/AMA0H2400563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa205f1498f5d7ec14ec10c1f945032ad4a46e594a4e2837154ce6b0b8a208008. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AMA0H2400564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09418df093e86c0155a880bf8b45f548010f9ff2c4124cf097671efbae3d5a8. 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/AMA0H2400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb3198f81ab1b0994bb6b87b7d6632ee38ea7bd0005a1c49ebbde3f45ee613e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AMA0H2400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2fc1fc543f63d99e3094801b2068d173e7b986adc44e56a50ae51d0563a896. 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/AMA0H2400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835a2357000f70a0d378d5256c807842acd27b0a41e9c2f367eb3efc05181ea. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/AMA0H2502035.