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 0x456272102bc36666649bb95ba3da831c31d6622c7741532849757a051023b90b. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffb05ff0-369e-4093-ab9c-5b440576324c.json and https://artists.proofprofile.net/proofs/artist/ffb05ff0-369e-4093-ab9c-5b440576324c.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 0x91d7315f98c6b376a9eaee1741167173bc45661692e3c64daf81b23173cc44d7. 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/QZDA62254968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1036ab8a2061ef67fcf580ab4f77e5171ce3eb581b6e747bc715b6731a61c172. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZDA62254969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f7cab9dbe707a8ee57173cc25a0e7fc87b0f9c9deb50c33158835be5ae5285. 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/QZES72075780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42685389de572db5ed2f0ddcd193d9ea279dd2cf61b488dfc684096f118101e7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCAGE2287574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59132cf0ba8a220702fb8708e5bfc7750ee4dfd11146215a5247b9e70ebe358d. 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/TCAGE2287575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e0b6790b2e6f61cff0498b88efbf9e99ecf67d6fa7387894b4d712bf6f9a44. 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/QZNWZ2160244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe32068199a6875e9d2be18b48325e0e5bb8f6b4d603fe6c7ffd7dba178655d8. 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/TCAGE2287590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9387f42a2ae3a3d7257e6f0c6283ed6e90f9aeeaed354f0e93c919c404ed5a. 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/TCAGE2287601.
L off the D (feat. YG Dreamz & TeJohn Anax)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf115fbd4b2edf6bbfabd917363ddbf618b9104a0424d8b0754732f2da458f9a. 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/USUYG1486096.
Can't Stop Hustlin' (feat. Doggystyleeee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fa1dd8bd777be437bfaaec20b755c3c50208f17238dd584295705f6d547733. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USUYG1486099.
Exclusive Presents: The Empire Roll Call
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cb22c0c32878419df1c86e6449c2683f58190f97e4f464c05f33214c2490f9. 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/QZMEP2252538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded96c70e69feca6b40fa51bdf68e412da4b8917d0dcc113d302c64d5dd03e7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHNB2098451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4cc5b313221c9b50f9eaf34b82ceee0f94a7efc793937f3132c43ee2b4fdfc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZFZ52046428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c66c73fb9cf4517d13c34d3bb5e856d4559c3f5c23dddf1712e0971fef4e78b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TCAGQ2247645.