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 0x69c5fd863592aeb9bcc89d71593fb6e6c8ed2bc17f52fd9e7709c6f1230b503d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0aa0198-805a-47fc-876b-14ec8380befa.json and https://artists.proofprofile.net/proofs/artist/f0aa0198-805a-47fc-876b-14ec8380befa.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 0xd3d2dfcf33f69e8d3431dadfe0c556bd548da5a36b324ab9292a932e14906653. 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/INUM72000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad4ce03f2424509b6ee5b912f15c284b1056e211f8bcd2c019b6fc58eb1758. 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/INUM72200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3dcf8d100a8c0a7130ee3e4bf9732328493df056de98985cd8dbb09e6df782. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INUM72000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566bffcf0034825deb3c2958dfba182680e229f5d44aeb0a44f97cb191dbcb25. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INUM72000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4da9b0d4a4954c8402313b154ec743efbb6fc4909b7b9c6a009e06f7a2ffbf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INUM72000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cf83424cfe232cc828eeef3baa513218d65a4d9e383bad9f75bef3b350db4b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INUM72000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a301378fad6a8b34eec305d8ef5c6ee40a1a29e54384a85d9f835ff2f95ca7b. 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/INUM72000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aed951dbc10f19e7b12afd1f54a1e1290c08277d0d2ad756b1f6926cb6922d. 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/INUM72000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f14893f116a9c6f4670a19a186bbeb3a832f70df3874624ac5427f2618993f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INUM72000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fc28a80beb00c5219201784c77c195045b4533edebe9307c860356f494c509. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:32:15Z), 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/INUM72100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f739de08d9cfe1c3860adbfffe92470041f27800b1bb8f1471414700577b93. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/INUM72100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba83197b6995e72787d0687674f7038f4312a97ba0fb5e57d4a8f870b06ebaa. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:18:09Z), 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/INUM72100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ae50d18134d232898f6f6466deb4d73b9956ac2bc38812a61d08ab5fdb1be2. 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/INUM72100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec01f962896e033e131435f8c84a895aefe16cd61216cda6b516c87bc43d3fd6. 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/FR2X41985924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172292f3198ce8785f9cfd4c160c6049e0b30749df8496df89ae924cf3c0c100. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INUM72000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac2c9031394a249c8808425efc8c72ee79231375dd2cb181ab9912a389cbb9. 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/INUM72000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cdf746fa85619d749dc1bcff2697e11646fefdbdcb4435a3989cc8fba4dfa9. 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/INUM72000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1f72f9241d028fabdd1680cf0d14b9a708642b506e5d274b5b5b673027a843. 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/INUM72000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49bc436cbb0d60de0654cea3cf49c15127293017608113a8f277e7a341150be. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INUM72000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac2c9031394a249c8808425efc8c72ee79231375dd2cb181ab9912a389cbb9. 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/INUM72000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cdf746fa85619d749dc1bcff2697e11646fefdbdcb4435a3989cc8fba4dfa9. 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/INUM72000070.