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 0xfbb5db8ea359e963f94dc516669ceb7b7cad3b55479abb1ae1a11edc024c53b9. 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/315b76ff-d7fa-4001-81bc-b9561d75870a.json and https://artists.proofprofile.net/proofs/artist/315b76ff-d7fa-4001-81bc-b9561d75870a.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 0xd9d97cf6a336fc7fb924c03456b234ce3b603da1898ebcdaab95b32e08a169f7. 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/QZFYY2588718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1c0176c0d705e70ac99ba45cc1422c05b39f7be8405e016fbe4cc84a3feda1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYZ2504251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50559bbe76cd73fc876b27df0458bef5cb73a5870bd9a831f2c94621b40ccf1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFZ22524214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc3d0709b4948d1fedbce55f982773f89b2b8aa1e0a81012efcf29bade04eee. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:18:06Z), 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/QZFZ32542672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94691366e3ecb830d413df760398ba79f64646d00968792411954b7f2fe48851. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ42595105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0782210ac9ba0265ad7eef015dc30de588c7b1bd1eb97a80d8daa7bf22c0f2fa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFZ62551585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234cae9fad4352a0ef5ba57340b82319018b6b31c1b3a4efa07d6c51ec2c08b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFZ72597516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48faa17f8d4608a095eaf605312f9fe9f2021e68136329f576eaa0ec9d7d96a. 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/QZDA42548763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f801188369c2995ef4ff8a12d6a6693ea6d8f3858f72ca4422dd3d12d7fc01b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:22Z), 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/QZDA72599381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b6dcb208dc8a8a5557f08018cd891bc9f2f0d971c8b9ac27694f18f7e49445. 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/QZES52503186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e45fa5d6a82376b1104562b624476da189d8fa312c1ce574f86e1333df125. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHN62552489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d9c5a5d1aecb1f00a20bdf90db2872240ffa3b2953b9abf4238b8f541cf9ed. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHN82558576.