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 0xf5e65ed401304c2a61856ab7a39b31e4d76548cf4e7b42a074c311360cd0e681. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f07ed520-b9a2-410c-928b-ea3295cb3e73.json and https://artists.proofprofile.net/proofs/artist/f07ed520-b9a2-410c-928b-ea3295cb3e73.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 0xb7fbdc1be4a7865292798367c57520834b9df7763831e27ee4aa6bdd41ae8058. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZK6K2103534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1631ffcb39be360c27831d26f5310a4db025b46c070030ee4e90542a76d0fb2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWX2117003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda72991d56fc98b2a3ccce64a0021491e188b8004f3683b4fb59d7b4b0ac95a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6L2200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54443e01578606d6bed6f81efb323bd6c071a3e63a5ef9ae5e78606aa2970b49. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6L2202406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929472829f0d24c861714457da9bfb4973450aed9943c1220fe5b1d2a666f639. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWT2271915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ca15a083b27036948eadb509f113524ca957d477f169de6ae2013bbf41e6e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZRP52274742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825f8d3cd28ee75cf8fb4ab5c6f21dd7e0695deadee141549c2b0f247894e902. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTBA2213247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a35156786225272c9b4341c221d9cf6f468313493dc64fec5209e3b401853c. 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/QZFYZ2325425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc396d953305f0b7a887e8b1043ee7e94058d138565d5a0c429106f2ec4e51c0. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZHN62354552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7708bec7ce94f7f2d404fd5a41cb9474b1d8d31545db366df5ae116bd1005c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWS2391679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb43c7f9bcaa032af4fbceb9fb89dad9c8455c1154dde88aee79f0e6ae2a62c6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB62377853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6506e56fe33eefc59b5d57a81b7d549a4d17eb6ca88ff1f03b715c8a9829af3e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTBA2327658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efa87b798db79a6dcc074770ef227263ca17c33605c8681d34be826ed69bcc6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZMEM2487563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6819b6bf6d44516f301f043ec303c3d15893a6c106aa04a5257e8b2f933ac546. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZMEM2487564.
Ericka's Song (Tory Lanez Take It Off Remix)