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 0x5d10978c1aa06218068be0a7df482ca032eb6474e10eb638e552a40e2297dcbf. 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/b48f33b3-6d4e-4cec-99a2-55b0b4519b6f.json and https://artists.proofprofile.net/proofs/artist/b48f33b3-6d4e-4cec-99a2-55b0b4519b6f.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 0xd788bfdb183c2c6414c67ff4f3187309e4864ee2122203a21cf35217812d8bcc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPW2355826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17a6137b63d5e4f54e3a6e0b03fa65fcb7632d2187a0f918cef8e290bddede3. 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/TCJPW2355833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6ad52336002825de674c71e8f3bcc364930b447720bfab85851b21fe356421. 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/TCJPW2355855.
Get Off (feat. Daichi Yamamoto & Kzyboost)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3d166bf9cb75408e409041974ba62c280c4bf9c519309e99c1ddb5e2cd348a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:40:26Z), 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/TCJPW2355767.
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 0xed8740c6f50fb7ecba3e150da9938044fd55d90635691c6cfdce7009f243379d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCJPW2355765.
The Luxury (feat. KenT, Kzyboost & Hanah Spring)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6814c3f1c5d158c9a283fab92ef28d4f77a9f63f57f04596625c9fc6021966b. 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/TCJPW2355773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3e531e684bd634f9d92d99350e8ff8cc394bc3d150389fb25cc3c54b189fa0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCJPW2355783.
Slide (feat. Puff Daehee, Ugly Duck & Devita)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aed75e4851448070fc1953ab04a5e4ee940a9accd8b2bb292fe0ba261750a2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCJPW2355835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d16090db52527834599196af7134cad7e2f1812912f0522a79e81c88df8cbc. 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/TCJPW2355839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef983bea154b873d3a94c485cd8d0c3f7dfa4625053776a7e7f7575f5d705598. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/TCJPW2355841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5040cf230baf3e733c7ba81b7253949a0e37f2d6a805cbdc69c5b45c05401fc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCJPW2355849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489c2ac9cd3d65efdda70c8892b08483dd4aadac84684f33f0b01964f1ea6283. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCJPW2355865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cca934ca63cc42872de2c4e1f66101a4e0c1172079c927d6e34464281bd2d6. 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/TCJPX2345776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b40a971a8865b2ad419c1b784aff5c7d2c17e3d8a84e160fe187fc58febe27f. 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/QM4TX2191770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcedf763785d106b0dd7f521c40a29fe8365d6cde1e8f452bee66916e7161fe. 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/JPB622201985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafa42c7d63f4901e1684c92c2c7f9b60d1e9ceffb653cc74cd9eb43746dbdd8. 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/JPV502300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9cf03b155e6b40fde54dbbc42f1c12ff1583cd2836386914e12301d0e352a1. 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/JPR771300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263fc76e7936aadb5709e9174440dc0a08251dcd415795769625bab59a1c7aa8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPS801947763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36742d9bee6f3d2fc30bfc82db052a4493b3dd6d94d7663a456a6d230153bbd7. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/JPS801947762.