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 0x0e063d37d615cfd54b49678bb69e2dac0a310e9e1e63346d86d566759273b4b3. 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/3059aef4-fa27-4bef-b295-92197f59f589.json and https://artists.proofprofile.net/proofs/artist/3059aef4-fa27-4bef-b295-92197f59f589.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 0xf5be6323494f9f1b3eaf613d72e29a9f18cb76e0e5f83822371f924261efaff8. 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/NLFL72100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a4dfb618b52c306e4f625d458fb88d291b402fbd4df485f482b7ea316736ce. 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/NLFL72100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761b04792d95453bee6fa83104e8dcf1f561c1836fe7fede8337d407d179b55f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLFL72100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94e6666b5840c9b3853fa66a0bb97bbd77869ed76a4add80793131609925260. 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/NLFL72100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd14145fdc87f0d6387542289d57cc3b15ce7ce1233402fe6ef5d66d1417a1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLFL72100928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb95385e03c4e9fd21c88dea675f0693a12ca1879cb065608458e99eac19468. 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/NLFL72100930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f046fa79c354600f28a28e6e0ef96006138d420ed7fc6a1886ceec982750f80. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NLFL72100932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d37a985c93772c05f582845935c4e8c73d807c0addbdb17acad369007a8ac4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/NLFL72100934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f1b3d52b4dd6cbf44451b950e9ba74c90bc67da9c69c625d3a6265463a67a7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLFL72100936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18eee9c60bcf536b1d54ce95032dc16477f2d30f089aeaf36c34e65c8521192c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLFL72300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048ed34f761e108a59c729bf53b263b0c966f9419e6526baae1e460d99233fcc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLFL72300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb869381d0b31e44f96d3fd811900fe5b7cf6222b0b9d7a49a56cb8c6718b6372. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLFL72300417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa104e2a17e9598e76bd65edeb59539801193e297aeeb5cd65d61f93456b4ba65. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2408191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30f0921ee2e61b66e929c91c0f8fe570f44217806e607965fa795e9568716a6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHM2405902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9ce58d080648e15b42585174c63d444f086d3536e6ea79d31738b50abf9928. 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/GBKQU2524737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21511b570f23a60c880f9e5bfc36305be11677cc0a0825f618f0a5cf266e8171. 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/GBKQU2524735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b32d38faf3400da87d8be121c7720600ea81569145cc0a10b5d3cab6afa2826. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBKQU2524732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dffef83eb1d70c2b936d188de9e2028da87a9cf53160ee9d2029a497d87887. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLFL72300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39493849824a672ddd4064f0952341b3da7bfefbf6e0d47aa50bb99c5f77dcac. 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/NLFL72200427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b429b4897c3c2a1153f54d279db92d5fc96000dd3f6afcd64f31fd08c56564. 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/GBKQU2290836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b78723506fb94fdbe1234d3c205f4a5780251b8c975dce19c7bb3ded6dd2c5. 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/QZFZ42417358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8145730137170b8bf3312f0ab34ff908a98a1ce8d9df623ba0ba2219468e860. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLFL72100397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb15567b63ffaa22145898158ab5312b85d0ae4fecc540eeb1d919d244d714ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLFL72400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2a3762411c1270c054c7df2feacfead1a025430fbd756b2aac0480367700e8. 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/NLW2R2250984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b429b4897c3c2a1153f54d279db92d5fc96000dd3f6afcd64f31fd08c56564. 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/GBKQU2290836.
Masters Of Hardcore Chapter XLV (2023) - Cosmic Conquest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cf273e3b01f8888f8c5b62fa6e8a483c63d8f59fdf6ee228d5451c4c158c8b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLFL72300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ddf01dedd6500714795becf22b891eb8515a4c71495312c31952d10c3e1378. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLFL72300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36563d75e8fbab5af8b5dc0dd205448f59b8aedec775d6fbfb8bd8b55c31c706. 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/NLFL72101217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae625d587e8f487af6f472e08a41538cede8e7b6a1a7b4607f0d9638da4f1f55. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYX2477093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42ae3bf4d45daafe85c302c187bb023c37d35b542ae19f860bffa83d3e570e2. 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/NLFL72100545.