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 0xaa8e0d8976342b3d2cde696ec8c3f451762e9755fe617c2cf0a7d3183acb85c5. 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/8cfffc37-f2f1-4094-9a90-33143a300146.json and https://artists.proofprofile.net/proofs/artist/8cfffc37-f2f1-4094-9a90-33143a300146.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 0xbaddd731d495ee116cb14bba329220088f9395cb5ad2f01d480682d66e3a9396. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US23A1579520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d9a31c0b970db1b2f7c155a064480fe9aeb1139a20f29c4b224afbba53c3c. 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/ZAUM72202527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839a2f1cf230e971dd9de5a50d3df51f57f22c96108e8aad68cb3ca3d60a888c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA56E2315011.
Kwazekwamnadi (feat. Sbuda Maleather, Pabi Cooper)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cdeb08ec9c0a4a19a1daa483e00caefc2400c26ab9b5325a4017c01af3421a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA56E2306233.
Thandolwethu (feat. Yumbs and Baby S.O.N)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988fa19bbb3057430e0f847f1fc72350805fbe789baf34f78b77d38e8b670936. 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/ZA56E2201072.
Mehlomadala (feat. Lusanda, Zwayetoven & SOUL NATIVES)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb4487947211f71d70eb14b7b80c3376d63044487df52f2a23ca7e4fc115707. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA56E2416120.
Iynkomo (feat. Tiiger, Fiso El Musica, Faith Strings & Njabs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f620aeb2ec063821519af0f849d2f22c97ac7074a1e1d0caf611ba356ec3c2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZBC042400007.
Tsela Tse Nyane (feat. MNS, MJ & Pabi Cooper)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3631e73d6292c5d87e8ccce22c16a3da1db7fc1af9d9f18d969b6e3362e49079. 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/ZA56E2201330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cad54755eee34c8c2c2afb62d2da89bea1246fac8eac14469b4a15e8d86f03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA56E2303124.
Funk 100 (feat. Pabi Cooper, M.J, Djy Biza, Yumbs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8b25f10094949269cd8c70d81cc21f4a373b8d84655243a4ef63ee4fbb5ae1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA56E2415864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66f318881f0cb7970a65ab9b0f29cbc76b93bbc8dfb9364ed4512effb59ac41. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZAC012201266.
Thanda Kanjani (feat. DJ Maphorisa, Zuma & Reece Madlisa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc497a8f57c3a697e48d1e61db12922fdac041e5e49ec37279e4793e15d113bc4. 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/ZAA012100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac580d79df974765e4fedeae57593e0b3655d1943be461d7809e5620753ceb5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZB3E42200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3be633f82699763f4a25706e674a008f7e9b55775fcd6427d04daeb7e7bc30b. 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/ZB3E42200008.
Egoli (feat. Murumba Pitch & Yumbs & Sfarzo Rtee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49033de6bf83ba11543b2e17df276e101b090e6aa7bbb47a154f82ef699de77. 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/ZB3E42200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f458b036f34b335376f86333d934e3c2940be4483de1c9b2957a7d6d52fbe2. 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/ZB3E42200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedee300ae2e00fa5114683cb926e9b623a5041b7adb28408cdcc63805ab2c459. 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/ZB3E42200006.