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 0x957ea2fcd29ff68b75ffba97b2b7eef247b7f64a245acf86be76f99b6c7ded6c. 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/470c149e-3770-4f48-9723-4377ab5d8319.json and https://artists.proofprofile.net/proofs/artist/470c149e-3770-4f48-9723-4377ab5d8319.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 0x616c1094498f198f0aeb03ed7d18d5f4b3a1417cad68377896cbb09ce1dfd587. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHNC2294678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad294f3aa6410c5310f8282f24da48139ee156831056def82982f43c3360145. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2294679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c36c4e9860728d4724bee232f381bd0bf60a736ed1123f5650afa9a93de2aa. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHNC2294681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00d9e41ce9b62b1b6fc5506a14f55e99abf820b049c07e2873cbc0a07630588. 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/QZHNC2286119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0107cf8c530c4610854b06ac600492a91027992406e810a3aed5a1e38767d4e1. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHNC2286122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b01fbdd16f8082996b68a6b8e558a0dfbeab86a6ca84c8b22894aac1f3c467e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2286920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9759b159749854c0effee2564f4541139540eea9dd4fdaa8d76bfdcf5014014a. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHNC2286921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a3fb300b2f09665dff3a09ca18e1b9a6f45a52e3841f5f1bf3ac750eda11a3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHNC2286927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5efc5b0a65e37c8f706b2cf093603b8ebbcdc075baaba084ca6526c7782c81. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZHNC2286928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9997546f046d545dfe20efecee59e84d92f0d768ee3ab73aae39d1fe292e6d24. 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/QZHNC2253051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75ee964491fb6dd4654e59a85f3b1b7e9bf5c0d69597ad1a50861cf4767ab8a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHNC2253055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b1eb31fd4e34794a21c46495b3085edd892242761f55224de7ed1f29ad293. 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/QZHNC2286107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086c6bb769e7538b9c7485ad8843fef94dd29768865237110f4e5a4a38f49e02. 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/QZHNC2246482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00407509d298748239d3350ca5f9bc1aca38fb9474ba386ed806d90dd1a5d199. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZHNC2285047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ab4b1faed0bddc59b94b43da3b0bd70f9b93b35103e9bb0b64e0599211baf1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6Q2229382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c503fe4a3fccf48af3c0b1f436f3b0b19272326b998edcf85b7b8b224f7dd7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPLR2235039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e4a8d9939be3948e4c84d8fbe86f5b229b470537faffe94f0ea1272b9eb6e6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZPLR2235040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e0e93724a96e26702d7aff62ce054b41a42f572caff54f1215099e46af991. 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/QZTAS2207029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab53242c13d721ed617864ebc5cca253086538ee7c7a15a031c26aa21f39e33. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYX2357444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3198fcc7c3a773a67542ff1f8662e51d0acbfd6f21242acac15346b8cbf208. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYY2311363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc886ee9a16a505d7506fd2aeebec7c751c6a4fd2d53ab96d6f70dffecda9f4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZFZ32390725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086043ccca193d84918e745e0c7d1d35ec1c59bd32ee8c2e5a741418e51ad76f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ42300634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c37856419a5c3f849f6e4fcbddc01f00b90aa0d1b5c9a4d0ac412a92e6e8f1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES82377919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84bf4e3f0e049b3c06946e9fbadcf4c40d5a21c09f912e7abcce352432e7d1c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZRP42306887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca592655a9c90f047481b4e105effe2a5cb583a28bde67f7aa247412f7413f3. 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/QZTAT2388454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aba7651c634fe9bf5810fee00582742a76799b5056ecece85556c2a7e0c9609. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFR2314845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f6207b33c6e2388de2731d2149aa04f4361f76aa76fd8a134357b79e1d0d81. 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/QZFZ22451768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51124231fd6390669d2f3391b3846a1d351ddea1e738133ef8af0fa88b306f7e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAY2471198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efd0fa443cf864a2367c47ee03d59014a4b6a1e1b9995616d837945cc337e90. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYZ2575111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7fb9ac8820c82c4d9b7b4c3e3ae29620def0b5fda278b6301c9e82de1f5f02. 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/GX3Q92474447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7fb9ac8820c82c4d9b7b4c3e3ae29620def0b5fda278b6301c9e82de1f5f02. 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/GX3Q92474447.