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 0x6fae13afc17399bd082cf79becd1da12c3c23ee65e6e38f8f7dbb91d99b858e6. 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/e3b1761f-8c8f-4c63-8bd0-55797f5e5185.json and https://artists.proofprofile.net/proofs/artist/e3b1761f-8c8f-4c63-8bd0-55797f5e5185.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 0xb061f7445d75990dc543a77fbc13660ebf56257eb566926876ece557e6f07dea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZA61A1304480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01e0d66a94afc008036b08617ae92be88ad3bc8762a73194e22a9925e8e617b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ZA61A1304461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30403aa28dd6fa694aef24693cb846b04b83610739215c10c2b9b541c5f4bcc. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ZAY391400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30777720500dbbb1cb68eef4e1c4510945493746698b1b952fc167df0bb2892e. 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/ZAY391400294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacda85becdb20b6b2b33a927d422006fb0b3aec6034d6b63bd62af3bee3aeb1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZS7J2497382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b050a1d4f63d260766744095cd0a528dae493e90b1de7bc0f0ba33329f5fdd8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZS7J2415593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7ba7b1834119160b4b351a8e84f18fd586a64a244ccf6c5cde64c68477a5cd. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZS7J2423860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaa7c9f19adf2649998daa03d3136295fbde0e892d699ab8484eff9227ad095. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZS7J2432630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd836d768dd9b28c4904ea579693140dcaee9f67e1d4aff180ff31312d448308d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZS7J2433991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eca1c5dff1cc8064ad39b3caff108ceac69425422ac24bf040cd0024d8ff11. 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/ZAY362200823.
Ruff Rider (feat. R-Mashesha & DJ Fisherman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff70a9632b56536adc52c03d9464b3998d2dd8fe52fd525485dba4474410b9. 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/ZADTG2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a774f656af15db1cd9b4a9980ffebd2d7f855217871e610f50bd62312ec59fc. 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/ZA61A1304563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee7b4bbb0d6d232ae2952912a4b5448ef807732d74b85151a76110b2aa143ee. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZAY591000629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ee9ae72ec1dfc4366b09e14e91eeca1ba493a92ded868a6fbde6052274c76c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZAY591000630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe402b2202c67db2d64b9bc97c7c12e25b0159ea57595aa2158da81f30e45ec5. 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/ZA61A1304515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7140d9fb5e25e6773080b9d59fcf902bedf3c5c9ae951b52228bf83f3af04c1e. 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/ZA61A1304525.