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 0xdd596857d860cde668f7b6c3a90951ae4c9765e0803afb9bc92138467da7627d. 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/72436cca-5910-4953-850f-569d916dc223.json and https://artists.proofprofile.net/proofs/artist/72436cca-5910-4953-850f-569d916dc223.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 0x521b84098312b1f476de9cb6944ca1bf79492ffd64d49bcd1c937a63261c3591. 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/QZK6J2094536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4750ceffe5457ee2958bfa7286a1a8620dc80e51ff441d2d8e75d7b0190f320. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZK6J2094537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae293de734f4803d1afa6535bd0b9169485c4e28923ff1f77ae100a133967e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZK6J2094538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d99fc1a9877b669e60696f7b054fcae52663bf37f0ead714ce72b48295efa4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6J2094539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053cbdd657e9df81bf439807197374165c4facdbc2a26c65ac943e6b7bbc929f. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6J2094540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d5f7f3922e75ca0556dd787149cc582974964299f383977c2e204949ac9a6. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6J2094541.
Chi Town Anthem (D.I. The Dillaboy & John "Greyfoxx" Brown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934fa1bca24ff413b6405b4fe3c7d67895555e30b6b4a02b1c32d06b00c9d795. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6J2094543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24dfab94f79a76d92d01242c72fef733f5b1ae6e3c052c2fe05a197429fe2f7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6J2094544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a9bdb4f9651524ca21828e4a6a716be3c2735158c825e0f5bad34ee66144d3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZK6J2094545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa9a8d9cc08ea69fecab9822944cad16e5e82d5f5223b4e68b145bf5105bf66. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6J2094546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3562d6395dd359f562ad90ca36d9ce9acd65516d7c60bf2585fedd8b9be50f. 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/QZK6J2094547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c784dac9acecd73f2f77905b558d6adbab0d7f89e2fc75b1de19a00ca64a1a5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:02Z), 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/QZK6J2094548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee52098e68e68a14c2dd00f75cde6c271ebe6c63e9ba74b990841a3dd14fe8d. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZK6J2094549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb167ac41514788c5de1ff9cd627f56ed2d8dc481d34e72b8a3045b068d22d626. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6J2094550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cfbf5ed8c7cd96ef23038147a57d1a3ec05f51039a2b92aeb1b2a24b483f74. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6J2094551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c352f3f074f0951a88f4f16a36cd9e259f56556fdf8ca859ffbfe66894b1c5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:39Z), 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/QZK6J2094553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a381c2bb22be7fe13de0bbf86b7d11eecb2fc5a6aa970961249b127478b741b. 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/QZK6J2094554.