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 0xf4ae898d1dcec1c98437e201ba5b1936f7213730c05763e645b2201548e03088. 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/e1097840-a5cf-472c-af49-767dfcf4cb02.json and https://artists.proofprofile.net/proofs/artist/e1097840-a5cf-472c-af49-767dfcf4cb02.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 0x8706c423d59ec62b1b317e821f7d82eeb5728ccea9b482bf88ba998b8bc6c2c8. 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/QZNWR2212025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9d9a9906de6d36b2ec74cabe6d5379606f1f9f5ee9a76ffa4c2db5c34048ec. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA42343344.
Hisa Wa Tiko _ Thembisa (Nyoka ya Nqondo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865971fa74d25f0de2c6f0d6f5fd9f25c23e2442af4e97533a27fae05e8fb9b1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTBE2390098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25db7a9d8d319f1b6b743fb6feb3f40b366c1248ff986a0026dc77043e76bca6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:42Z), 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/QZTBE2390102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469943cc6a86463dd15c07c59017f6aa5513c5ea57bcc7228ad0148a3332bd75. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTBE2390103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e8ef50f421a83b324afb75d5fc61a65e8ac443e70826f13f61484e0b11e22a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:51:58Z), 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/QZNWR2436588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63099e5c89ce6bd17d4173a478dd62a3af454c7982417d4cac030ddf3b73b408. 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/QZDA82539866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9247ade8db07a16950974614df5d61b61481a15e7067d5eb59584793593ce1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA82539868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256128ebdc2e03883bb69c131c0e8c2341c6cfd6c106eb0d96ef3c0112914c3e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZDA82539869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81b8728678af7cddfd1305515310b0eec89fba2e6d3a19689e4bf3490ca9644. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZDA82539870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db254cf13ccd83fe44c3963f472002c92cc78cc53e0dd5f7c341bd723bccac6. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA82539871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde518b8a3b311ac6e55fb29f9499c51bb6be5c7cc9bbe40491974d4e89bc5ed2. 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/QZDA82539872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d6d2a872ac44bb36869d074c078055a6fd719c1379126daec0ea475d71c0a4. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:35:47Z), 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/QZDA82539873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9739f4f96bb44272ce791c4be5739235163df573ba4e28140816033a9363d215. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDA82539874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c17022886afc3b81ba48a9e5efe47ad376bf29293f7fa6b258906cdb92d0c1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:20Z), 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/QZDA82539875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944740e2d170e3bc4feada0d8917040533c69ba07da24240f3f35d1f7ab7be2d. 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/QZDA82539876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b384395a8c3613ef269cd1764495adc5f4d6218384c347cc984680541793c3. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:08Z), 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/QZZ7K2577407.