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 0x1a594f3a6e929523a24b6128cb3a3d2ae45873402291dc0eee00e52d213875ad. 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/f5c04d22-17ee-47fc-8e5a-68ebbf1253cb.json and https://artists.proofprofile.net/proofs/artist/f5c04d22-17ee-47fc-8e5a-68ebbf1253cb.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 0x850b88b06a237829040fb6afbfd1b6b5991163f2cb4501b74b9c0b4276293d74. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTAX2240956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04f76b9ab51466f9e7b66c911c9d125b29091705474a1cb531e8172161900b7. 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/USUYG1725054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40736baa94b54ec6ed2c45f7031068b70ef8a510933e8b56aca1c95c58259df. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USUYG1725063.
Yakuza (feat. Fordio, J1hunnit, MJPAID, Prince Jefe & ScrumbleMan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf19194191c06d7b366a1b634ba6715383dca05f5d8a57e677e939662cfe9e7. 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/USUYG1509886.
D$M Cypher 2 (feat. $camaurion, JuSleaze, MJPAID, ScrumbleMan, Trdee, Fordio, J3, StanWill & Donnie Bands)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf832818a75ec32e066a40855637c630f4950a22469781a76416f10a88514186. 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/USUYG1448604.
Song 7 (feat. MJPAID, Fordio, Trdee, J1hunnit, ScrumbleMan & Prince Jefe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f1080d9c64a0361cde4fb9e6cf668af4649bf175e5daa4ea780a12bc48c8b1. 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/USUYG1508473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20764c21dec3f104109e0afcf2caa1c1c0fd7306800cde8f5510c826e8626a04. 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/USUYG1458643.