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 0xd3ea2bee0cc97c0f3a38f37d46a3b1fe277a515540bc6b7ef0f7b0bfcdebf21f. 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/0eecdede-4a2f-4e68-9961-7c8514fc6302.json and https://artists.proofprofile.net/proofs/artist/0eecdede-4a2f-4e68-9961-7c8514fc6302.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 0x70983e9f7a4d371d59ac63f79a3b747b6fc23db3e29b54df917f068ff22d6bcf. 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/TCJPG1705505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476e015df0513bf2de327e5951667c7f58adddfe868a9bdb50a49beeeea2d9bc. 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/TCJPG1705507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495b0e12ab8d7310a443f6f2410b8baca0958f6e59c5fb68289efdd74d6cb015. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCJPG1705509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11fc30ec78d39c3a2dde04ee301104d6b804e846e78a001ebc32948494482e8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCJPG1705511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55c921c605605590a753a4d443dc361ae6575e31ccc164f06b2fe0b09a9f721. 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/TCJPM2076142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c6d749e652216a92241bdc524e07f9d692c3dbddbb7c858ce3c48d8db2685. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:53Z), 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/TCJPG1705470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45df1696e1441c877d2a3c62577f54e9c9c5f4e1bd21ea25f3c4d9e1062773b0. 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/TCJPG1705476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24bf075d0e98d283cddbe18f7b9e2e5c1ac38a22b3187156ecb8dc9060dac9c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:07Z), 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/TCJPG1705480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26044beb728ea7e51bb520534af24205771491089e8b42a954c67e09907f6b4d. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TCJPG1705473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c4698b5da400b93907804eb66950bd316a8dda917a4f6fa06fb941e0fe1e1b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCJPG1705472.
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 0x8e1f57eabec73e4d74e5d3b430f52ff9b1050b1b49ed305a5dc5863b17250247. 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/TCJPG1705475.
Paper, Paper, Paper... (tan-boo remix) [feat. NORIKIYO]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8355d269537fb7a7fd0b574ff0594bbe5725d37b49a2e28f8264ba318d93c1. 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/TCJPX2354336.
Guilty Luv (Kenichiro Nishihara Remix) [Bonus Track]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda651f4ef60140b7065bb954ca663be9f917f21e83288016646ac2174be0c96. 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/JPC971100539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cb96f7c9b269bad34fbff8a46e92d4f46719762f4bb68e3737d34965e2f855. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCJPA2445981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e994eca283ef1759c671f5c00e925615f6ef4bbdc4714838cdc774eae46003e. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/JPC971100533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883167e200d30d924d578dfe7037ebef4d424551e0fd70d8fd19a0eee27d0e62. 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/JPS801190155.