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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105390210eba5d2e4cf3a234038b05e105b05a17529a421925ef7f3d858bafa8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28bb844d-1095-41a3-8e5c-8be7e9642c73.json and https://artists.proofprofile.net/proofs/artist/28bb844d-1095-41a3-8e5c-8be7e9642c73.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f5d928b4b6adf1fca6a61e95022f3824f094545f78895cf2494d064626ef75. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:57Z), 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/QZTBC2569195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca5d6c3376cc97610a02fd8ff8e4cb35ad01142368160f3d71cf19b64b114f9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:14Z), 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/QZTBD2513825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35da417f8858b2099094fff2c640391df43b6c07ac2ffd0706dd9d90e91137c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBE2522310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7202a4f68b794be9fabef565cccaf983b4e8c0f3c32a06eca96dde26cd6160d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBE2523604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17da4163a54f8c8d05fafcdaa3e52034a24e66d9631c93de46a65ce33c3ef70a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:19Z), 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/QZTBE2569219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf785f76582a5ff08faa4e42cd7c24227ad98b11813de80a381f94112aba45a7. 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/QZTBE2571204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe56361449fd03dd3111b90ae011bb797304e4b561989c1f2461c7e254f71d41. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBF2596705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a18c17b3c7531721b795b7391df19568bcdaa01ece8b13387afafa28f82687f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTBF2596583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d5a5e84d2d6e36c187679cdef95feeb9507d2b1727561a6a3fe5d06a239afb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBF2596702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8fa857bc1b9dec67f8abe1bc2d23929b1dd34577f03836994e47c0fe33f7e7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBF2596714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9462742201f9624255209cd7c17e82f6dc30593017d49af83c52943e95d3973. 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/QZWFE2598229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba79f693202f66fd357126ed8a7a91044299fedfb151628e9264af936f8da86. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:26Z), 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/QZWFE2595618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf04ffd128fbcb9fa84adbe97522e49dcac3401c4feae45525308d2fdd967aa. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFJ2524345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd666f6f64cace1375bba7e11eeca0acace8be75693a6f02c1549d8f47fbb8c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:28Z), 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/QZWFJ2567533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0508f807090a2102481cc24da774407a7cfa4578b02c8ef2e8d3a5099ab2aaec. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFJ2565575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343d008aada322423f78b69630cd7d22cfa77261821c8958e32fedc0867192e9. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZWFK2589837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644d6e2ecfd89fd1dc416166d4c73c1b8d4c3c3a2425f32667451fbe701d63e2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFK2589844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fbee34ede9037a8926507bfab44150a888efe944f992da909e93bbfd79fa72. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFK2587684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc84d98cf87ba630428bd8ba3160f1ba7a0609bdd717573b03e15566a154a57. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFK2589834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb394ee5b8b2b17cf3a5c5c7bf741288f32fd06b4a2135fe59f90ce386ef3bb3d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:02Z), 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/QZWFK2589842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d1590fd8d68b7e32dafeaca4be9c2cebadc8046405a70fa6a4089fe674ee35. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:01Z), 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/QZWFK2589848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a1624a7ab8923a3b80ed0cca6df9d7b6d5b0cb364f3196de9a6f0da259fcee. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFK2589840.