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 0x735a892c1a625464df604dd2aedbb039ca89b82dbab3cd5bae2fc30efc389824. 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/733c5cf1-6492-4222-b4a2-87a2598b9348.json and https://artists.proofprofile.net/proofs/artist/733c5cf1-6492-4222-b4a2-87a2598b9348.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 0x6f226a69e56344bd1a92b1c1d09c9c69d5d84795dfedf25db14ebc6ea718abe1. 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/USJ3V2359422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bf3318b10781ad4c122c940b93153bacb60c946e81ba3112ee335174754d99. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USJ3V2361396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba82ed5c65b717ded5006d7dece718cde65c2443e7e151194c8d5f5d98a24386. 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/USJ3V2361397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8739b3528c73ec2464513af3d048f1b0ca8263105cd59fc0f41ea02574606257. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKXN22278600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafea175506f7032633025618ff3de1bd988ab605e26c282fe022c014573b4fd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USJ3V2353130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730ace6637b025b984124aea9239d8d86b2123445b1bf341bc9bca8ac1db7923. 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/USJ3V2353131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38d2a679e14f95aac7251b956b59309acf48bef9ff77ba49381e00ab704760a. 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/USJ3V2353132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e7aa2a80a33c3c816bd2919e733d6a649cb4ca6b05e6f534d0bb8965326178. 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/USJ3V2353133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfb7145a64708ef6c69d6ff7f67f9d0f4283840ffe415e7aeb53af3232c3839. 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/UKXN22355177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a51ad474d4d2a60d51807c593e0c1a4807545b7ff104d1fbf39d3aadd24cb. 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/QZYHJ2302772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683797cee17b3737f5ad613049dda7163dcda972eeeda345916edaaf9fc7897e. 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/USJ3V2362429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8758bbe4fb0bdacb80e363b7ff63c45e29185c153bd00213dd97b600223d281. 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/USJ3V2355180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d0b4ea714aabb7c499810a62190b82cb106f0c78e5aca25d93d5feaebff882. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEH742436520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2dac8882800cdcc1c8cce8e3111ebf143364394997c4285112fdbd92a783cc. 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/DEH742426441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58189943773107655893a97003dd575397a7cef6b617f22a4ca4108baf30844e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNMW2337061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb67f6a637df0f6a1ddbd4736258ad33cbc0d27a751533955a7b91cb36565558. Chain 2 (Bitcoin): anchored in block 957534 (2026-07-11T07:10:38Z), 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/GBLFP2419831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48436c6e4940f57232f5ab13cfc26bcf1d071943a80a0616398af193c59699c. 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/QZNC62321249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe086effd899b86dc46d067c7fbd49ce3077d8dcd45db75cfe027094bb09617f3. 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/DEH742420630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f00e8a87fc77924d53d90937ec7a145f20f9790c39c5c0a1ccdf191e38d47c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZPEW2474085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed5a1f578a4fb8924647215d57714f99cf6ebd5436b2158d24585ddedc031e7. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZZ662447395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c15ae2978294f2b17c2a805a76a6eb35f30fdf58672bd3a556957242ccadc3. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/MXA3V2429324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccbbb52d8e7411ff963f7b0a1c6340ad372dee10579d31b539e37445ff1fa0a. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/DEAR42520494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf10e2550d915f07630ec4e033690efdac7ea32765bedf747c9f6071805c801d. 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/DEAR42520620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5423b251b9f3e027045f4701c33509f3a0f87536065898e313f405e264004b27. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DEAR42520508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731feaec5d389ed436150440fdbced34ddffeea03e25662050a8b26721fffd78. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/ESA122550798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e42f4f19e10527f1cb2c2f11ed062d24458f73feedfa6d60d1631e851eb2c0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA122550799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40041d49066584de4c233826728f06e83ae01b06f3e5c983e572688cec00b0a0. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/ESA122550800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52eab26d54effca5e12e326096533c010f14b8854dcb53423fa259538fb26916. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA122550803.