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 0xa9e918548eaa6ee17ba1597621b79747787493366fa43b5afe52d6cef4bae9e1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b911de1-e7c0-4d44-b7ad-c1bbea3bc1dc.json and https://artists.proofprofile.net/proofs/artist/5b911de1-e7c0-4d44-b7ad-c1bbea3bc1dc.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 0x695516e6bd34f7ffa1bab1fb0d89c20ddbd61c6b9610e57c9a3dcea92342fad6. 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/NLFL71800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08a782b45b41ccb16f550f83492d1d8df7788068c6f074950bbbfd842510bee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/NLFL71800267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7335ecb1846b2295f710231e908a70da3e563e0c686104e68a46760ab02922d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:29Z), 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/NLFL71800991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cb2ac24db8f2239f70fc8684a492e5bdfbb76ff8910246e1abb57783594eae. 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/NLFL71900164.
Indicator (Official Indicator 2019 Anthem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866dc063c51dd07f1e3d5ece7758bcd9159039ec17a7bd1388349050f2ee47b4. 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/NLFL71900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5144c4a89662f0dc14ab8e0993813896a411ea86ff9a65e2ec151ed3f46314. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLFL72000149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6ab5199474c61dd5b7b1f87cf78cab695acc0b10aaa05d140e8408aae3b56d. 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/NLFL72000297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02921c0fd6f62251b6f15d6d0a6a1400aa69dba5d4c6fe18fd461672a1fa6721. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLFL72000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd987abc98c4013b9a35cb3cd694bc15673c2a20a3baaa3297d2c4cee4eb227. 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/NLFL72100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a55320ebee8d82282f35cb59e6bd15b87be3dbd3d6cc5f9188902b8825f943b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NLFL72300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a8dcc2e44cf4b48222143f3ea3658f7b307fb06a250b1742be9b9bf29056e4. 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/NLFL72300643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434df15206d264bb0fa0ebb20e9d71449fcdedb8cdaead200f7964388ca5c416. 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/NLFL71900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ab025ca27793a1c29668704691c0ee02ccb7d1fb1572c34a79f464ae8918fa. 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/NLFL71800714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871eb9477cca2aa8b386d8b175f2c7254aac05e876b82391c1ef1667087c5c30. 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/NLFL72300353.
RAW Hardstyle Vol. 4 (Mixed By Endymion & Bass Chaserz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d80f20227dd7d7f4c036e39dc58d6815e8734ac744eccad5b3a266ca7c702a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLG3W1500066.
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