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 0x9173da122803feca119d3130651e2954eed519a4fd1c1ce949518f7c8ced9290. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6003980f-e68a-435a-84b6-86182daf53ae.json and https://artists.proofprofile.net/proofs/artist/6003980f-e68a-435a-84b6-86182daf53ae.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 0xd262427de48fda8c8ff84b0bcd6c7cf81c247cd712a967cd1b1a12228ef004fa. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/KRA340905476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382df9b9180661cffc72ed27b17193eb65c2c202828be4276b16b07e2e1c8708. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/KRA340905473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ad0a7aa6c716fdc16729551e83562f0eb51f44ed0a88f13cd9795395eeecb3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRA340905474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d471c600d27019da7df249dd97d33eae2a7443e38da4f551e4dbc93b50a436. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/KRA340906007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25753592ac3bb5240ed52fbaff75de201b920fdb1a5dcd03de83305b1263a657. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/KRA340906010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d9d5c4af71dc197997ba67cea25e1449d0593fbf3a0bdda3e1c56fa625f92c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/KRA340906011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e6a4055dc0a9a61b979a86f6c4a59f099dc8bc8ab6e3306fe69d6ae9e76882. 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/KRA340906012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497189799ef0a0e35f6a5aca54abedd3d471fdbc0601ef7dd43c0640405a1a60. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/KRA340906014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeb667c951355e45d803d41a32cad7c5c5e5d37dc3a4005be77f56388179d96. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRA340906016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9da4e127a6c08e5474fb612106360e6df11d48d359ecaa32b634560920c7e6. 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/KRA340906018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188c3a2759b2cbc84ab7a6c39c12bf2afa6c3a9cbce7697eae171d07b93afa92. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/KRA340906020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae380fd88fa93014ff7561b8105502072e81d9b8c4a870c09348c26df12295. 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/KRA340906021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9701ae5a1f7ce851c32f2b79441e2ef467393134eb85f2ea758f92686b8c06d7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRA340923242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a2654aca3ccc5567f01b02064cf33437ed997a122787ab78ace8768382c450. 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/KRA340927260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a2654aca3ccc5567f01b02064cf33437ed997a122787ab78ace8768382c450. 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/KRA340927260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86425b7457253dfaabb17fcc0c436de2f593fa7557757f8d1b5b6a14eab9e04. 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/KRA031207485.
Octagon (feat. 2Tak, Tymee, Bewhy & Kuan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0aa038219c89ed0958d5f2c59192b04e8b3502c93bc3ca7f927de8b2336ee2. 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/KRA031210916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300d8f05936d23c6fe3200720ac4ae1d0bf30224d22fd926af08632798708325. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/KSA012378612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978e9c4425d5ac6c134c96ef378f268fd5212f2d07c055ad2b71fe2d94c1ba9b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITO172240750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dcef2663c5b92d00a4d68415357b4fb0a50aa7c4605b3bc0c190b834810d91. 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/CH6542015536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9db86946184dcce678ab16cfcbece12ae635fcbb9ef53fa9e6f402cef30718. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CH6542051789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b858dd4db7315a65482ec29f443550c7acaced8d4163f628c5c15775384e70. 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/ITO171740052.
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 0x899e3223d4ea1df9b34324efd01b795240be0f2ecea4bfa74faf56de57e41fdd. 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/ITO172240747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d8fb6292c7f0dab427f8219998da95dcccfadc8eabe768d2cc3376157f55d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITO172240751.