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 0xc72816d9b5d21e6c9660334f0268d21c14d5347167f21c1469e05c65c6db1891. 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/2b764f8c-3d0b-450b-9ee0-d1ca5076ee76.json and https://artists.proofprofile.net/proofs/artist/2b764f8c-3d0b-450b-9ee0-d1ca5076ee76.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 0x533982346fa9bc3862bebc9b04500e59d17e5bebc7a4f3aa0ee5b8678972e9b0. 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/QZTB72342030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ecc05a97d2fec989175bded30333a7f5478fec066491d234a8f442686fcdc8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:28Z), 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/QZTBD2352735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776671018ea4afc7e52b82ef5c7032c62baa10fb190b37c214bbbd0db9145160. 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/QZTBD2386916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf713504756e3315c7730eaeeec7d52adcccfe8e97445123a3c63d972c6f11fde. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZWFJ2363465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c2179ea870b662d8d62d474bbeba19fe93aa457324dc3f5656215a5c86eb45. 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/QZFZ42465423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69efcc684782fad37fb27fb0775479cd6d14b52cb25a0837cc6b661eeceeb71a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:38Z), 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/QZFZ42465424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b9f2286a14f37601d869d26ae87bc08ee0d4e94b9095171c8f8c17b3a742e3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ42465425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7015df108bbd6f443c8d6866167fe0ccb05450c071f74203041b963c4cc4e0e2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZFZ42465426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0673c5baad9765d6fb61dc4cdf2e34265917195227347a80a7abc52194682f07. 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/QZFZ42465427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe2b789bdd2e81109bb985ab76d2b1d5b4d5377a32ee647d5089e3de7eb71d6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFZ42465428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a8f40d7d694f97e183de1ff9b2142b515700462576517500e6ed45b37a94ce. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:50Z), 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/QZFZ42465429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3995ff32dece3b13aae16e28ac61f58011f0dd9a2f7fc7cf4926dce7341375. 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/QZFZ42465430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eec9e871dd168a57bfb178182f63f02bcf13677e9b2a174d30ca095a22a2d1. 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/QZHN32475056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb129ada71aa48dd7e10f11a9e4a839d83ff8b01a460baeab37bfde8a387c8e29. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZHNB2474709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd5e7ebcd33a738da8126f35ca7ea1e6bc5e92f8cbb1325b851e64f390e0e2c. 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/QZMEM2458739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638d12a7439945aca095a3e1e0cdc669735b0a78e665c4da3b2e5eabb6280935. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZTBD2451357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb252a921645a80883a1370c21dc411ae88ea01d5c3f682b547b9b22daa259336. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZTBD2451358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30095c22a6927bb7954f99a54bed4ea615a0e7cd1586a9a059ce5b24c4e21b5. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:34:07Z), 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/QZTBD2451359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fbeba7a5398a72dd147c3ed0d0c85fccbd5ce204afd3976ea7fed7ece709ea. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBD2451360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657297153ed3869fdb669b226167aba382db5c45156a5badca33fd9818550349. 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/QZDA62560547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d596ad4449f2fab1ecb3f6972920ddea39c3dd775be430d3270fddf45d09b9d. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNWX2564876.