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 0x531821dde223c4563ecd00a17d96cc23b8c6ddc509cb32d811e1023cbb440250. 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/b00fdb11-d4ca-4091-9f58-f45e0f0b8557.json and https://artists.proofprofile.net/proofs/artist/b00fdb11-d4ca-4091-9f58-f45e0f0b8557.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 0x8d465a03d80b3519afbd72bcd3f4dd0a03e1b035103361165683c041d7e532c8. 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/NL8RL2431709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2062a6b7ff4dae50e917816bd7f5a20ae84d939fc3d5e5ecf05547711809b9. 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/NL8RL2435743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbe2ceb4fe81aecebf2c44a487afee73e4f773dfacd53f7b25f6fda12187db4. 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/NL8RL2435744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0f584ed82ac01559fe3630c1008dd24828e5030a2319bf9392c07b9be84657. 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/NL8RL2435745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4324443b454c865485938f27d4e72aa2d3f5ce5428d93cda9a8a71618ac638cd. 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/NL8RL2435746.
Back on Dexter: A Gangsta Grillz Mixtape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b3ebfaebc2df4f1aee0b1a8291ea01ad46ec2d53a63752ae2e3b2182430705. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US5ED2202553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb386f4990fb2cd59963e84def2c57e26ef5fd6303b4d1460c6baadbfee9518ee. 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/USUYG1436771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512d18372b36b5b745c304d8c677d6fe1468f7ca10f10556c670c70f7c49d07. 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/USA2P2330132.
Rat (feat. Baby Money, Babys World & Tay B)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c1998a8ba24098dc680dbe0bae5399ff5baaa39f8fa24dc441ebd25cd9ae49. 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/QMRSZ2001131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512d18372b36b5b745c304d8c677d6fe1468f7ca10f10556c670c70f7c49d07. 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/USA2P2330132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71931ce0bb53446a68a0aa0a6bcae456af06140756cc7d6842b3e134cef0bb74. 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/QZS7J2304561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150c13829e56a74031cabff06586d691dee730d1ed1cbe99b46c39dd87838244. 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/NL8RL2423896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47994e0f4603e72788220f40426e839d56c17719ffbd42d0765b24706ec1fd35. 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/CA5KR2467089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a7266646de845c3a61a9cddad8a87629d41e21987ce573f967eb915a41a5d8. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZ8LD1987121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cd2f525418faadc7105e548910622f688a85c8ebe38898c1e4cbdaa81ae8a8. 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/QMJMT2305161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d465a03d80b3519afbd72bcd3f4dd0a03e1b035103361165683c041d7e532c8. 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/NL8RL2431709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73365e2c1d8d4a8fcf708d3de6af62ccb572b2a80e9531700470ee378bddb0d. 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/USUYG1704639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e673a0febfdf250a4da284721d9d5a9527c7b22b1ac22cdc2272a4b02280245. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN52409731.
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