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 0x1719d58656f4bd496f95283562aefb4475586a1d00db1a6475e969205f6ce402. 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/c761281e-6242-496d-bc88-13eb71c9df49.json and https://artists.proofprofile.net/proofs/artist/c761281e-6242-496d-bc88-13eb71c9df49.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 0x21e15261e6a3f6f20141fba45d378116236477a4dc210872a866f36b3dc75600. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZFYZ2019167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ea5378ed20980aa3da86eeb21472fc41d0933237c29c44b57db263d6263d9. 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/QZFYZ2019172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37423ebd105c346badec37ff170f02a7bdf11eafaf7faa9aa9a9edd73fb4c31. 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/QZHNC2137311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437ef760035ecf99fe1d54fdc90fb49af8b8571638edd0d44cc2001dfef5bb8e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNC2137312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2fdf5a6a1122e9884c5167759d24ffecd23c13546b6c1b523d30ce88daf314. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHNC2137316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2a2fe1aefcc414efedfa4cf4fa0cbd31a318f7e8ebad27753c891ecd45bd8e. 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/QZK6K2176096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547e714a3d551dbe14136c6bbf0d14c19aa32c4c85f6ed298bc0c7ac57c90f4. 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/QZK6K2176097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08654fab8896ed246728f32b5526ee8d007bcabc95babbead74efcbc57e1a33c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZK6K2176099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2e78dc8519fc859a0eacd6223949d50a31a253c34f44cb5bcf4551dca28712. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZES92366016.
You Ain't No Killer (feat. OJ Bandman, 400BlkCorleon, King Pwee & Heeme Hussian)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d05c84f296a8fe5186d71619774736c125e403755636115cc9ba5b4140858a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZES92366020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5465cf1b7ee50f2d2e47a209eba1747d384c133a4a1e7b5c0693e4578831e49. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USLD91752508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5352f4e6ea05a9f0775db8f7e2ca35062c8f157929de68273840e69ca7247607. 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/USLD91753477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bd55a8c881fd6ba6ecca90bc855d6384ab2dd83d37bc0623fb545ffdc97b55. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USLD91755320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a1cd98fa5a0f0709f3aea1fec572456f1ceb4a21bb5087cc297966c1670738. 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/USLD91755321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00079726b54ecc8478af7e2ff57110e6f1294b9e8d2523be4d3252fa2158c9be. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USLD91755322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c0fadfdd25370e87f7eeeb99d2f548f37786b0801a780a3143678d865c2143. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USLD91755324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1569b4a0ec39550f6da4638e54fd29c8d7ffc0ea253e0f2d4f9d895595cbef. 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/USLD91755325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09be63ab134c5735f1823cbf8c2187d8921be3e5bad3087479b8267cda92e30. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USLD91755326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0773548d7104f66ab61c9ffb1b587ef65d0898028629a4a1742e17ab44d2bb1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USLD91755327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacea8f92e3d95e8bbb06f7b5abbf91759dc6c71fa7209bbc79f691f0b59450f3. 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/USLD91762032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce17841faa5b0cc1884725b1fb7ad9c7a2c9d57071a57644f23221435a3ef1c. 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/USLD91760920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dfb2d4d2740379e06a64ab254c5521b1d2049831756cbce32d1389a4bd3796. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USLD91762034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76439d043c91d7b63dc6dd1269e4351aa999488195b695a33868cb5bf130ed0. 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/USLD91771446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4616183311aa5332216f070a45e23c195913c943a8e3d3a2d5a14ce3d2ebeff5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USLD91771454.