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 0x1d27af22a83987d95dd5c4b0781eea866482102c3715fddebfa714fd701d3612. 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/472db9a7-e818-4657-b44b-d210d2e39052.json and https://artists.proofprofile.net/proofs/artist/472db9a7-e818-4657-b44b-d210d2e39052.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 0x0622e19dc88eff4abbd128eab0251cc2f0debbbb30021ee9d2e7f9b4459c1618. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHM21374810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22ddfc21ac86d0d343416a637676d34c34011d7e4c400217d59d5b94c2f8f13. 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/QM4TX1774502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d580fe639bd02fd7807aefc8e01d852fbe0b5c3298de321393ae75e0bb92bc. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX1774497.
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 0xfe3c5d6377956c4bbc2f8f68013bd4e3e1bcbb85d277d2d7893e315ff14c3ce8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMFME1956654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f385cb015757719f2153ed34bc4f897b1c00ee750fd72737eb60efa4a45484. 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/QM4TW2104906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb758dee53a7a177c70ed35e4f890195848150c7fdaec141a16b510fe329ba. 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/QM4TW2506475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351697204637401e0c88f8084fb0409901399c95e8ce73e8fb6b382780261afb. 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/QM4TW2506476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb528f844f5cb5baf0c44de1bf6f9225602deb041a315f3c96bfacc95a7bf2d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM4TW2506477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800540e10e301a67e637508d041b28c710be75af13c425743037fdc58840fa64. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:33Z), 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/QM4TW2506478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e8a065f3b2395006042d4d758aa62be93af667e8076d894cc172da34af2c38. 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/QM4TW2506479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa70f62ce7fb284add2e9c6baa350ca716ad559373f584619a20fe0afee7948f. 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/QM4TW2555588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5517d930b9bb2bf9fd2074f84aa3ad684930eb1bd0a3dd8b04a791bd1ffb7330. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:00Z), 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/QM4TW2555592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882a5c0a7162d41d8913589a8917ac866beef3a5921eedcc3e13b5fc47418650. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6MZ2517492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e824fa0a9962a033966bd2bfd64fe5c3899e4c8ecf60637d420aa2f43d1c9e. 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/QM6MZ2517493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0db7bf7621ff707f73ba0cea0ef1d56d7050e24868c7013c0b3cb1f3f615ea8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH6541671256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485983b837bfc2aed7e1681c63d3185b8973924cddf4ed55fc83cc546a8f651d. 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/QM7281864863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da6ca85350a2e5c6301904b0feb89f0175e7cec326e809285d86f6bf8cd741f. 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/USLZJ2273828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c575632c30e10c55198a5d4ce34eb568f3be72f3412ad2d4547992448b70ee8. 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/GBKQU1754849.