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 0x8ba9a3c8cd9918efd802d57a04f8748a6a5e0348b149b3e40bc6d11f0d6fc58b. 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/8a76e798-5875-4f89-bb7c-5713b8fed821.json and https://artists.proofprofile.net/proofs/artist/8a76e798-5875-4f89-bb7c-5713b8fed821.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 0x6164d0ffbbf82b62faf3a4c4516af39db9c1045e949c2197d792e004312e94ac. 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/QZFZ32065219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e1dcf30079dd879a16701342d12f3f506cf1ac0d149e6a1e025044d1a0db6f. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:26Z), 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/UKWNM2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793881bd4251903bf602556ba4d8f6ab195f6ed3c3fc1175d9e42ea54c253dae. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/UKXN22058913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b65a8d12eb0539d7cf3c431e9371c8bf31e88d41da0dc4415b5b7d946714bf. 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/PLE072113506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3679801c0f2f2994a49ec127d1c42e8925f844f692d7e10b8c71e1ff2d2fd. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:11:15Z), 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/GBKPL2206715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3679801c0f2f2994a49ec127d1c42e8925f844f692d7e10b8c71e1ff2d2fd. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:10:15Z), 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/GBKPL2206715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba43e51e90d23bf1ba8da8676ce04646e75de0cee46764e579566431be856223. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:58Z), 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/QM4TW2319768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba43e51e90d23bf1ba8da8676ce04646e75de0cee46764e579566431be856223. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM4TW2319768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fd87c54e1309600e29eea92b10d053432d75c8044725f2dad98c03512c00d7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QMFMG2364708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba43e51e90d23bf1ba8da8676ce04646e75de0cee46764e579566431be856223. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:48Z), 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/QM4TW2319768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0eac5609a719881c234b71ddabbc6bb2e2ac29530ab2a20058f9d3e48ff71b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ATJA52400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0491d6ebf07e38eef26183a629bf12b81c64940815049d8af1dfec257a3cdd8. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ATJA52500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feb014dbf816885bb10769231c161d74eacdd953b9959304b97f89dcc30e681. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ATJA52500503.