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 0x511f5acad2801e133d3ec7814dc292e549debc976071dc0f9cd45fedf4aed539. 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/d63e8529-2039-4d7c-b7d3-fc5e1dd740a0.json and https://artists.proofprofile.net/proofs/artist/d63e8529-2039-4d7c-b7d3-fc5e1dd740a0.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 0xf013da5c35b5adc9c43a15418e8fbd6586bcca8144bc5ae6fd0827fda5b3d85e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFYW1957966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedc4eabd44ed2b87658ab025b8b4d556d97ec7c8d4976bba812a2724a7c35c3. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:12:49Z), 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/QZFYW1957974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70085b1fa59bc04174fdb3dd3c2cf1d4dce4f0f9fe577a5161ab9406495e63fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNA2004130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342caf9820270e3251a954f3593b3f4a57fbc1ff389c5f1dc1e04fcd5d8ca6b0. 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/QZHNA2004133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b37a7f4473450d9245f90647400614b61f36caec2d044127e1c9668923109d9. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZHNA2004135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc631eac58db68436711c065874fcd09c58ecf200230a1f3328bb4c4700ae28. 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/QZHN92065588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98843c959198b7572ecea6e1ae70297322526073150786896366c1e94a3a982. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:24:10Z), 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/QZHN92065596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce3d77122db112a034ea1f3462549e9368cc147e32ae0660934c62f77656c8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWQ2104913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402166fb504571eb182eea077afcf245173fcc4eb37d9298686851920df63b3e. 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/QZHN32204700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cb864629da5594b4e326125f3743b1b21a008c455e3a34bcc10405e5ccfd8f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZK6H2248198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691e0c4073a32210fe32cb05135252cd98cc0858cffa22d197a5b4b002b6adbe. 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/QZTB82289059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f823bf1bcade185f7e338b88eab2fdaa8ed41ce1d6aeda419635d5091e5091. 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/QZTB82289062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4b9525732d49e35f42e421dfdddd3947a512b505f698574b5b39efb7e6c6bf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB82289067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557fd137b4d0dcfeea7742ba7c4d938df4c55e8fc3229100b4f64a20d77db5d4. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZTB82289069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462149825a9cd17804d719ad01189da34d532c6790d709d4b3ac374de9d9f3eb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:06Z), 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/QZZ7X2444450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f298214e704e9aed2e5090342c37200d1dd21bfc90949bf44c832a9133893. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:26:57Z), 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/QZDA72595006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3028982b54f6d91cf00a479349d8ec398db119434e10d7f5a0f2d42ea3aba56. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ792503550.