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 0x276539176b50c1ffe8b58f5aceda5af73377459a816a65a9d930441e36231792. 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/86d73616-2fa5-4f7c-bd7f-80b9ccd19354.json and https://artists.proofprofile.net/proofs/artist/86d73616-2fa5-4f7c-bd7f-80b9ccd19354.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 0xdc9bf7d6ca10190bb7792d14c96fae470c94dbea878db1e9dd629c24b043ec8a. 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/QZTAW2328641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaed310e208fc8dae8c86d620f46c01ad6af000fb0d0e593df7f275f0d02c3b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZWFN2322841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8723890105f09e7eefc704e6d31fa8c0759bc092684d5c8adab14373070c74c1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFN2322842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e8268bcde0d5b651bb5d5d937d85e2c7136a0eeb85c3a6f71aa58a1f516b7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFN2322843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1327e21f9524230467eacf05d55b39956ef66677b7446362bb4b33c11675c8c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:50:49Z), 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/QZWFN2322845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfc2cf0b3192bcc31c102da18856125bb67c455302061ea238cce60d135bfdd. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFN2322846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0d3d74740aab0ef0193f552331fb19a43f7784b945d6c8f32e6644ad473b32. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:58:23Z), 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/QZWFN2322847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8030b21a4a942e08180ce5270171b0ce11fd0337eca9b75ec0d803e607ff2cf0. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZWFN2322850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a85a57ac61c42c8090ae11933660096d6a8000fd58ac4129733119bb872f42. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFN2322852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdfadcd2762ff1026491200b3f47741f26da596698ff72b7aefda17ac334499. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFN2322853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8244da9121655b2c928b71b8edb86ff3e86a750ba30e1441a87b323271b1d1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:36:44Z), 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/QZWFN2322854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037ede45439701891ef04832df1b690926964c79cc33ab0ab6d853130269935e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFN2322855.