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 0x89c48822209a0250e9fd57e5e7f9eb82431365fa49e797dcfa1b733d104f81d7. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3cef0dd-b941-4f90-aea4-77cebba9e150.json and https://artists.proofprofile.net/proofs/artist/e3cef0dd-b941-4f90-aea4-77cebba9e150.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 0x73e93a73d4f2395dfb9c1483e2fc1aed40dbbf1e0ea7bc0af32d5492171d9e7e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBMA22098950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7864491439256eefaa90a86f5d0db124964818d3476ee523c2f8fb63208241. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR59R1739718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181630a988cc2cb6a5164d54e9d8c074e6c54031d11325f932aea5a0dd2556d4. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM6MZ2018820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd926839f0c91f07247f65a04a7240bcf769230971e2d3dbbbae232e347bcf93. 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/QM6MZ2018821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f4a12986abb4c3be149bb16b2f4073772d3c6a3880d15ea0db133ba32fb24. 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/QM4TW2023086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c13760738fea3ea886f30853f0ba22bbb0172f3abbd2475893637ab34a0f77a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM4TX2047401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd64b9dc70c79adb0df57eee2570340941201253c1d75b710165c23b882194f. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QM6MZ2018835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e9fa5c9f10af8ce721bc6a6f58973ad4e1bd743bc5f203cec6a42b917c6e97. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6MZ1846082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27a5a23528e2749c8f0645d2e486e5f0aa8def20281d56e64fcc51e14391588. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TX2019448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81ceed58aea862850e74be8458c101c091a8a13b5e4ca333abb75ec810f7384. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR96X2318844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340f7c1f240f3d7f2d977f44672f3c8acf7eb9c4b5010cf6e649b3ca31054210. 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/FR96X2318845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053294c7d4cd50caeda2b9585d075f2288bf4c91ad8ece1d77c9331dce6c7584. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR96X2318846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c746799f65cdd61256b4dfe115cd742c415654e6fafd4821ed49b29f8b37b79. 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/FR59R2389863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ad924bde7c0a02c02810e62fae21459767d949d5bed3c18dac12280f22485b. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FR96X2318847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f19f2ce4923f778f26a4d14dfe2ecb29cc77de79c1737fb4d44412455823c5d. 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/FR96X2306649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea4a45b3ed5ce19d97d3df67b87f3f25f9048c92ad993a9075f9ac6d8241fab. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR96X2318849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e156941754c9797b674c33dff7f999b0e82d3986cbc54d2f6207eeb1aa766. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX452218554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e30a97f06010e1472416daf91fc02ebfcf9cb6130e34240bc4697430ad8385. 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/FR96X2318850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d56ee1fd0ddeb51d3f86c97de1dab871b0c7eeeb99b8d256ef0627f275e45bf. 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/FR96X2318851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d11a946f1696f4749c093b4d71c77000bc876443ee40a4ee6d9dfa554059cc. 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/FR96X2318852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15418137c8ad8191cafc8939209903be34214f3dd72cbb1b0da08c4431a85a87. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBMA22160447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094153e98d98c16fc451d601264960b0637ac6c520ee53f586e23ad78102a1f5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMBZ92053605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0004545946db8d4a75e6ad047c6564e62c78f9fb8549d304c8b077a58f12c88b. 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/QMBZ92020183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce94a88b076737f7edaaec815a5007d5305317d7aab5312da48028e8466d846b. 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/QMBZ92020189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0365d8dd8d0296328bc6554de617eac66872ea7eba1ecd079953974381503ba. 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/QMBZ92020192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18df432ce4c6b052fad36c0ade3908e2c3df992beceb1927833ba595b3b45fe8. 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/QM6MZ2015963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fa8a2863329b10eeaabc47abb463e3beb50dc8a359c9c79f09763684e52e41. 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/QM6MZ2015782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e2a38a87e05cb82c4d133dd81f0833f742df32f5d8bacb449b8325ceed753f. 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/QMBZ92020214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b1b6234e9eebb1b5c2d4dec77e43b201a0e84193381041d495831c91fd79d1. 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/QMBZ92020220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773d3d84b70996582e02d4840b2d641fa8ef5e46d1a9497e0fe725d0338088cb. 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/QMBZ92009843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373ee48355c4f03adbd57e8e4b42930fb58f4ee95fac4b25118db400e58cc142. 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/QMBZ92053604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8ee9eaa41bec94a836cbea1d7ba959d2412a2f3730303235f50237b272cc08. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM91177391.