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 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 0x5937a7c02fd1427d073c9e744b0e4163b777b568bb484aae4063775f94149710. 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/923b63c3-6264-4bc8-ad4b-52d40ab4151b.json and https://artists.proofprofile.net/proofs/artist/923b63c3-6264-4bc8-ad4b-52d40ab4151b.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 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 0x388a9eb63689d77831dd8901c15018d286e6511ed3f2bb34cbdfdbb9b62fdf0b. 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/QZTBA2363495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37adb5319108ade24ce7f21604a4944bfb2cf08c7eb4537090c619a3ced21ec8. 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/QZWFE2344934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032f67c169b039ada108e84991e5f4ea72c93b583f2ed607dbf52a6f387e374c. 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/QZWFE2344935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4f0d2947cfeaa367b847aa4c3f1ab495f48cbc35c150f1a193f64fe36e93a4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFE2344936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9776dae4bc173c22deea8e01ba61446ba63e03bbcba56e1654abb0e41fb070ed. 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/QZWFE2344937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4189c80c0343f03c68042d78f58decf5a459d7a033340daa645b97306cc7fa6d. 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/QZWFE2344939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a4370e40bb53999899fe0f00ef84908b74b771089c5fe79532461b56cc1551. 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/DEZC62383988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdaf77920b76c9985c100d928f7f68955939dc82e5f42ad8d785ee8d0da36e7. 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/DEZC62383993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b9e08837f97b37d56a6d5e37ebed11e43b7576721c084f26b49ed13b76c2d9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:26Z), 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/DGA062468363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823d11c61ba75fbe9c1943e56ae49f0629d225eff46ea04b77152d21b7fb1c8f. 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/DGA062468369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa560cc3a419f08c8f8fff98800106ab5c581a96bb721a3e95c5d637fea1bde. 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/CH7812238572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b38b956d0b4f361da62822d2a10ad172786dbd4c793d6e5a06245b195d38148. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CH7812238574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b71926cb0d11d3c41c26ee27c56445e8c513e583d37a058eddb56fdbc709f57. 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/CH7812418599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf642e2cddb4c2db636a6be1d59d15ae36a62d6afead8f39c6f66cf1f67e190d. 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/CH7812418602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4f2dd0aaedd7461992948151adb6a4a3698d05d48f0d1551946611bd4ad8c0. 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/CH7812417579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff84316f0edad96afac1f57b264c6ccb4e8ff3b999121c98a3909d56d75ce91. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZC62570624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeb385c78a6a2f242c5cf14c06b2c10d568e7033459cec3cfcd9a84793a2ab5. 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/CH7812425170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feeb790b67ed7338a3e6a48c4d8809fedb71ffdf284fcfb79f3fe5f92e8d195. 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/CH7812424348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f3e569c738c86075ea5a906ce56420b8b2ac676e09fc1e4035814281225b88. 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/DEZC62452843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecebe2a65a26c9097f67fe943afc26aa756a9fe1a68b0836779637a7e6856e1. 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/DEZC62462933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c77f361b5f5786ce69bedd84908edf4048100deab47219352ec0e174b8fdb6. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DEZC62462935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee03915c4e56921406101f04e03bf36bf99a2f811631598fead64d6b8c02fda3. 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/DEZC62456655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca08610e6ab875f1f0730ba68a8c3860b7e3689f7b320f5bb18e38cd4a0a09c. 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/DEZC62462936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d1e0eba37ce7af2805ffb51d2633a1fafd3020a1b97fac8a0a6bfbd2c13306. 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/DEZC62462937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbbb783497ee6e44a4c3083d0b7be0ae6b6a1dfac71c2a1b2be3fde92544f8b. 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/DEZC62462938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25932fa12848b1582369e3054bfb23d3f0f29dd2ee41e7b57cbc4f550d33c692. 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/DEZC62462939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988fed59c35773f97e063ec503f3089a852d8a957f20ebd71bc801c065764acd. 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/DEZC62462940.