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 0xcb95fbdd6ef4b1b2b57e155326dc6d9b544b3d7b848e538ccdfbb07e4305f38c. 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/e266ca13-e949-4327-b9b2-a661ea52f289.json and https://artists.proofprofile.net/proofs/artist/e266ca13-e949-4327-b9b2-a661ea52f289.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 0xf61d047406ca63c15b597eff125ac7f47f5f048890018d1aff4cce0b2c8bb4b1. 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/QZHN52465433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6781f3e579dda3dc5deced2c355f3fdb60e9fa868dc7d17280779d49ff11fe1b. 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/QZHN52465429.
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 0x53352faf2332857f6d4905877bc3729b6e79113a20523752c1661baa90ecbde7. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZHN52465430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d263b114259d3ee34ccb162194736a1bf217c067c65e7d6217a3597717b324. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN52465432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf89eb0933c2ab4a5274d1b0ba61f937d2138727251b36d064e25f845ed5e096. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN52465435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc3b8ed2435cb6d0762a8b63872fd33e595dc5af00af065a094b7be2a68856. 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/QZDA72326932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6644bd8a3f9f442bef4649d1cc38d72b6994b125aa103158456a758651f234ee. 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/QZDA72326933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1dc4cd1ee16b7363b0ddaad05c54623a6c88451e5a576e07a3b10964d16aac. 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/QZDA72326934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b30110619f34f450d8e9c6638c438726f5fe639a27432d849d6ba818eb1573. 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/QZDA72326935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea04041d6f606ae073fe3429ddc6963a4bf65d7eed8bc33adf9a3738df9897. 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/QZDA72326936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dca039bc5d5846c7a2f23cbcc868648d5052faac76970196aaee08e907f3a9a. 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/QZDA72326937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeb5ff5d0e0760c060e8d97d4bd09e4917c1153a9ba2a35ebff32699d63bb20. 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/AUMEV2515609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde90f16b3498f32129a429767fe872bb14b72760d8eb90f04342872734558180. 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/QZHN32338213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d0f4d405f64813896986f387a90471055e882bcf48e6b67772fdc69318b1f. 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/TCAFJ2143398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb793b96afe548c71b00c7030cc026584b1380273baa3503fb698686823c2229. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2232201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea63d77b900153287728e9a0335961d0ebf3b26b6b886b97ac04ab96031bb9e. 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/USA2P2233782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383eecc3e0809297779d7e34910e079a03963e9ba69641b34f6838a238d1381d. 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/USA2P2233778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bf1aa856a3800ed71d5f1a250261fca3e8e1c9fa04f5d92b5083edbce442c0. 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/USA2P2233783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dd971eafa7234d65bf341857efcb7c5e971fa068c6e36d6c4a020b5f4d26ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN52146964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d26fd3ea8d73a59229d4ffda0f5e9f389ead12df5b7721fb4ae13c88069e48d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USA2P2233774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b791c70b534cde81acfe730307c0069f4dc5679c863eaf8c136d311773ebf90. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:49:02Z), 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/QZK6G2095020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef8ae791d2f59fd75338ed3689476881fe94b6a5eb8e6ae398d3fbd0e1349bd. 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/NL1AP1987062.