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 0x1470207800fa59cba70ed775e56aab91e53b47b2353a0e43cf6c6c59e95af35d. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/879cbf4a-068f-43be-b667-e2d7d0bd841f.json and https://artists.proofprofile.net/proofs/artist/879cbf4a-068f-43be-b667-e2d7d0bd841f.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 0x94340678c30d74f46019323f4b6b4704c59136fe9cb0929752298a2f3ffd20c0. 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/QZKDK2131088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf071913798e867214424c7f90302789f18558b4ac9983d908e4cceb9ad6eb2. 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/QM42K2050471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6784ae064d280e644a71628ef576a617f9adba77244b7aa4db8dc9bcded0a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM42K1910202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14daa2b000e8bb101a7d4315540f838086ebc18b59cbeb15615a4dd2ff8cfceb. 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/QZMHL2518551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839a043d0ef26f102ce3d7ec38f263cc3aea042d4382771b224fcbecff2b3cbc. 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/QZ3NU1629151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201aa90ca22794181117bb6b53dc8c5c24a7d3789e5ebfb6552d9f104eca6764. 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/QMZUQ1584673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521555f16b84f60067c6ba14c0f0428f8bb621ef07c41d1462c9da5f160b2fd6. 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/QZMHL2588480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf25a58148fa4701bdf77023e2277d236190587a6649c6f7241ef0057389a08. 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/QZMHP2527955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cc8ae9249f90a62567c928d91544545b1cbe6936d4c6840d70de29c61d9dc0. 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/QZS642548629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90f8d7e729e2a13a772c94dbd82154bfb20a8a999bbe27b490e55644d2fd1fc. 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/QZMHP2556120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57486cdeae8b093384a3495afe10f6e649efee5ec93dd462d92fe203169928. 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/QM42K1606831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef7a50c12dfdec363e7130fd4cc9d6c9e48235d1bcc144c0676ee6220bf23f9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM42K1701261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e134067f3e4c8e9a775add901c1bf0a53955ed4aaf754f19b27f3fc4f74c054. 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/QM8DG1814151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1035b74289894d43b87392190d1f83c72b9b2a564be34c02cdf41406a928936b. 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/QZMHL2508147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9dfade634d6bd71a3989266fd4a2e180455dfd5b496aff24e26fda197ea833. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMHP2502152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffac15fb08d63fe27d30f4d66316f44a3f38a4b1d48f87759b08651c627663b9. 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/QZMHP2553891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba921f8300180ebf784b338be86d1cb34072d30c4cd66bbef27e49ec9ddd4b3b. 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/QMZUQ1514681.