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 0xe63287bab7c2c08e3ce700eb9ccb8537d7324004e1d4b9d8cf117e238971fca2. 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/32b8b267-0fb3-4557-9458-20ea252bda77.json and https://artists.proofprofile.net/proofs/artist/32b8b267-0fb3-4557-9458-20ea252bda77.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 0x08ab798a9551a923e6afcda993b1e768519a9412dc2753a02a03dd6ec82dd808. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:08Z), 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/NL1NR1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2fe216eceb34fe6499665d5291c621f81b963402d7c8ae198f68566baa0656. 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/QZHN31907310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b6027a934977485c8cc83df349c3737517f579ef6c78753e62339a2b099654. 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/NLV6L1900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20333e83c73739ca488766879c4df7e23d8797e849ac6ca9729727f967da0184. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLV6L2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3756a8320ef162ddcf4e0d9bb4d331b125bec1112502aefc599763bcbcef6672. 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/NLV6L2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239ad511608049105256891cf91d10437116c8834977a75e54080ff8e651215c. 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/NLV6L1900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e823e1b371802e84c0a9f113a7e25b4516307c9886bd2e9ee69da4b63e4754. 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/NLV6L1900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b6027a934977485c8cc83df349c3737517f579ef6c78753e62339a2b099654. 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/NLV6L1900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a823ce163c08a30fc3ba80c6f18f1fd06d60f5df825354e46bc5b28e6d61ec5. 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/NLV6L2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92a6b84368dc10ae27d339c77aa0b76fd263a4fe1e73b9d2ab10aa158728483. 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/NLV6L1900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5527e32fbfab5739a802b9795bd859b51dd86228d1a2b66627c59528aa7e7c42. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:12Z), 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/NLV6L2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673bacac0566411db025858cee10cc9d7d205411d9dc112b5ad9e517f30b30ef. 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/NLV6L2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1096d0ef5db9e7495388da260e54ca88890a987adb4a6a77f9aa5e0a37ea5cb7. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/NLV6L2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb55d9ea8f99c7ffd24ac9b694f383f3925458e9284efe1a734bcf2531365139. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NLV6L2000238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60ce0213dd6aecb539300a6b70c590ea0a5636fd1081ac7c05b735d2025174c. 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/NLV6L2000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1096d0ef5db9e7495388da260e54ca88890a987adb4a6a77f9aa5e0a37ea5cb7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/NLV6L2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679d2991e39864b66b562271a7281005ec9734da1ef89f517444cd1530bdcefb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:29Z), 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/NLV6L2000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1e5b688e86b8b3779b2efacf6c83fa7f6dd615569dfe9c7157aa8c826a1450. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLV6L2000228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cebb37f2ecb44c21feed33ae875bbf28e303ed94d55ffc0bf939df648525013. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLV6L2000239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c954d130749c9ca9ac431a8017943edab0710728295cb12d53c49a1e6cc19c. 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/NLR1T2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f35d7a255b08921a92fda8277712ea0e9de31d6b5c39ad7a49db8acde0b9f3b. 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/NLR1T2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b56234eeb269c8b6801128257ec5159baf405140ef7f79f9f6811ae9870ff4. 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/QM6N22275580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283f6f907e2011b29550f534f521370c503660c5c7ddddf2c5e9ca96d25cdcb7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QMBZ92276679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699596cccf9692ff8c8049cb1334d1dfff2112e34bde062dbc4b7b9bf09a37ca. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QMDA62250225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404a8279cd15acd23c71d531a362b7d52c88299dd4ebb5ff3e248d1c51e62285. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMDA72298329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e58e4c7e30c6f4f960416b72c0a5e9347578da75b2dcf883dea91ef075c256. 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/QM4TW2368748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc0939049167f1ec94d6109d6b1db88b93086f3e14896ef2a807dad3ee5c7aa. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM4TX2390973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ce21777018b45c8f529e16a5b6d5ef8be552e54669fc93b841aa910455bec2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM4TX2320253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc18f110ae579ceb1d9f71ea75a5bc1a761cda09735ac1adf37313dc4eff9d1d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QMBZ92353055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8200abc4152bf8224afac809aa5f51da171808b691a241e2329f3748d90fe6d4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:48:09Z), 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/QMFMF2357638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec367a3e83996aa5f232737ad3735f5e95658934bd544d9656520e3bbc60a8. 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/QM4TX2439538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7516435bbb3d2ac1ec066fbe4e4db48d5389238c8e9638740d32122030b33569. 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/QM6MZ2463930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacf13fdfafab544a2e23b6c4a4487eafdbd2d9138709daf1bb6bad694a52977. 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/QM6N22481887.