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 0x45df2c011a5ea22bd1ed7d7452efc797f52060ccfc0f242d5cdaa6b2f2798800. 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/c933157a-77f6-4917-a3c5-644ca47344c1.json and https://artists.proofprofile.net/proofs/artist/c933157a-77f6-4917-a3c5-644ca47344c1.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 0x1c2b2c125d37a35f0cd6f5691cbdc0665427ded2fbf2eb4b7957178b397980b7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR10S2049515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4514cb2a077e46307a53e9886d0508f6a16f083bcb9d6452ab5811f7c3abb45b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR10S2049516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77707ce82162f519124ba0a1deb601fa9de919a6647ea3593a5e580d32edc02. 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/FR10S2049517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee4c5b908edea774f91d415caab139851abc9800e1d3154c6ee3292be55427e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR10S2049519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf270f5fe91e4919ee89808b8fe6ab3be0b7b9f97dd9fc76b364cc7b1518f70f6. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FR10S2049521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0b753ad72544b739d5e7a6735e5768487f8e2696cef990be9cb10c5b6ea920. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR10S2049522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ef92367342136a0e893a53cc5175296e360b073c100fc398d99d56e5e2633. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2049523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf37821bc45e6ba07123b479d2d6bf78e4c43d6d44da57838a71c2b507f2286. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/FR10S2049524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b2cb6075b3b15538eacca832010a0a44deceba2379c85fbcf301133b3dae3e. 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/FR10S2049527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7463d9984b91867903ab6436fefc1be31918c3b1b1766057063f891fc9f6a4e8. 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/FR10S2049529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1bef29d472c2e8a06a5248215c5e3edeaeee8b9acfd44bc1403116b0afa1f0. 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/FR10S2049532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da57c941a441b6a65a4fde9c985c7a11c2981f4681c5d81fd1d0b89946af880. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR10S2049533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbf914955707c4ca275efc18b4277885d998971133d4827e88fe99283f0eccd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR10S2049534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5db3a733b8bd956d5a995f972c3fc6762e2286e78c02afe9099ab9349fbc0e. 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/FR10S2049536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff78bb2e36d2f17bcd371329b086cc6636db9ecb47978edbf3e5903be4b0e3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR10S2049537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520ad52f8db47e58cc31af3dca61d9ed3ac23569960ca18170d4ac9473195300. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR10S2049538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb95fea1bbe1fe2c22a4771d4179993cb667caff129710f023d43282132204a. 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/FR10S2049539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbdd75a510b0a69037e4e305941cf838022d8777d8d94ff31b0f2134fe8dc55. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR10S2049540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5a4a49cca36cb7f2ee6b83c2a28cf6b1e2bd675833a5b5495880a0217d8eb5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR10S2049542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb3af7a0a85c904a1872a20d31df95707498194cd147c97373a45aa4a0bbe98. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR10S2049544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe361b940e4482b39017b24c25ff5a3e267045b4c0824aa6b7204ef33de9b2a31. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FR10S2049545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d753087bc27c568e7f2d544ebc3891a0b9d258519ccead01940f767ce1939. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FR10S2049546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff4fe2557b91c85f77a4369b0f51cf307f150bcbf560f3468b41324ae6d231a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR10S2049550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb69a6b2961b9b131924aa5965df16699a5596826075aadcb3bb1750809305. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR10S2062628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553881c79a4790344d9916ac39de526d9ca4ba16bf1318734a4cdb875333db32. 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/FR10S2062631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe729ed1cae561c06d38041f5b4215a6057dc5a5b89919b6dd1eee6dc7c4b3d13. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2062634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18c8391244c7691f4b62bd2bd77c68b6c8c4a31cfaab79ed6e059a3e5b104e1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR10S2062635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd443e779dfba5642cacb7de6a2dd05d96132e1a0ffa248d5204a414afc95dcfe. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FR10S2062637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202513a58f00496868bf75b46a1d5806d20011a5551b1e91636016a95e78f6d. 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/FR10S2062638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f4787f8b29b3dc24432857a943db9713eacde6baf9b6fe439f4c6c80418c43. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR10S2062639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466880fb10b048f6d796451f2eb94fdc0dbd071fa9b0c8bf82e0ad4dfec5de6c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR10S2062640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393b9b93b6000cdc523f4da9f3c596cdd7a9c8e8919534bc2ac8d52958ec7af. 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/FR10S2062641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7606e4843853e344e8484804490a88393a093efcb2237e35aa5476b641809c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR10S2062642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc8afe2663ff3c2e461ea2363242e82e9e0062f1493b8e7486220cc1a1ee1d0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR10S2062644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e7ed856254410e6115de04873bfd3d2d109c6a573687ae5a630c1265181c1a. 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/FR10S2062650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54445738d093eff15ec1ae41188ce5460dcb0c847195b03fa6d87e575bc295d. 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/FR10S2062655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92e2d5d694d9a681d3ea05ece8c063ea2f9a671373e57734d5754d2d1e3fddf. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR10S2062656.