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 0x5984a46293862d2cd1b71932b65b758752341aa5861f51ade3f6bcb421916e8f. 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/e76867c9-4cd8-4a0a-9043-10039dae2531.json and https://artists.proofprofile.net/proofs/artist/e76867c9-4cd8-4a0a-9043-10039dae2531.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 0xea7addf8e272258b2f0b613104ecbae4a0df7373b8d784f6c172d7a8759e9049. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/INS172206146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e03b9174a1c4d40818266150628ca7236ed55dd2ed241cf684bd069da674b5. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/INS172206149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8842fe9b9857fcd870f6b1e8d30cfe5a099a774d10bdeedf6deb1f27f5f58e2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/INS172206152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22396513efaabb2005498ad2d8af045c0a4b53d3df27124b2722986c7b262b63. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:03:53Z), 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/INS189690212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06dd710516d252c08638de8a4931cd901e0fc2298a2abea7297c63b574de88a. 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/IN0141401493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8592726c1df2e4a6c97cfcf0c9b0000a968ee89f392bc917796171e1a44a4d. 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/IN0141401494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0456ed3722be3c36c7319b695b58b0b72977daeae2fba7b418e66fd9d97136. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/IN0141401498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87faa50509e24bc6b53c610abecf907e607e5f4250488fdf33a8d45e136885a7. 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/INB111501308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257ea9e6a9c2ce1bcc8fb259f048bf06f783f77195ed8470dd99ce939d20cc15. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/INB111501309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a383262ad13069f25573e7e73745f56d29a3f66dcf25e2f16d51cacacad4b5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/INN241407633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5231466298c926cd841f6e22864fb91c258429b1cfbfdc5cf99b5e2177f85f08. 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/INN242319887.