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 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 0x6474b2093596a4741d2f8ab9f2be68e44f1e09ae489b37800bed375bca39788d. 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/a9c125cd-7f64-4845-b0ac-dd52b6f34503.json and https://artists.proofprofile.net/proofs/artist/a9c125cd-7f64-4845-b0ac-dd52b6f34503.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 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 0xce564057947d0cf47c9c643796ba0f460eea666ffb7a849632c49700639f95d4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USUYG1301041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5f9a60637453236851ba2725711b35e51007d443dc5e83d178ec2010b18379. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USUYG1301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac88861f809a8f96263334e2be134f6543e3e2a21141fe81ecb685ad1a810f89. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USUYG1301017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a59a40a35f013f62f6369ca2c2fed29ef85d6511fc6fc122b0a8cf8d2f92803. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USUYG1301048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7453cc1ce40099bce6bc351076010971136c2922077e9a73506767122d268a9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USUYG1304129.
Free P Huncho (feat. Ghetto Loser, Cartel Fonse, E Baby & Drew Made It)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2a58bcfe52ab0624776972096775b67669ce8d21fe54235e158730a40c024e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:15Z), 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/USUYG1357846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e3a86752f437f21146ea0f810bd0b28e8a1d543eb8b1598f7a3881a81dcc42. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGJ2238335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9249aed85ca2b31f87fa1c9adb8d16bfbf2c21501a0b243257ad479c22f373. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/TCAHN2361517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7cb9d700bf6bdb40f0889e7a4f67608bb3e98c4c8e7ee74de1d7014611ce84. 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/TCAHR2380942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b0b5a8bba686a86d88ef6be14113e64e2517a1344262d4c89c431dd0587ab1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIY2439530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e221204ecf10853595b283135e5ad5236fd7fc32497c7b9225871afc1f3c1d. 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/TCAFX2172672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd216cbc47ab2b7098a8c9aa5d4b4cbae16e84757fe4714cb07ddaf3022bffbfd. 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/QZNN22120994.