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 0x1c32e0878b1bfdaf98aef039964948cadb6b839bcd8dd498286ce7a86806ace2. 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/e1b606c1-d3d2-49a2-a24f-faca767d1360.json and https://artists.proofprofile.net/proofs/artist/e1b606c1-d3d2-49a2-a24f-faca767d1360.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 0xd98fb7006c9788b13b126bacd0dfdd56dc217317278ad04447ca34408cd68978. 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/BRUFM1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacdc26ce20b3ee3212d12e02fbc5ddaab71889a6438f700e164ecc916be06c8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:40:57Z), 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/BRUFM1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d799f6b4e1e3e6cb832a1419278df95f36c7387d4b6c5a83a2a897b487884a. 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/BRUFM1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17026334923890802bc30da06dd2e0c34269f0b9d802bc323aa11f7b4c68ee4c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRUFM1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627c221d20789956ba72ce7233f78ae16606a717bf81e57bf2eedb6874be20f1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRUFM1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca96ddc01147f81d6b0984784028eae3132fce8466fcd570e8ed9ec53a127ed. 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/BRUFM1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ea3627426c28a3a16b80eca3e41ad0a557235948a2317100c157882b9d49d2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRUFM1100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d9de6df5575af67ed8f4c842e79b086990a4c4aed0899ec9e111c8897756b8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:31:51Z), 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/BRUFM1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8067c4f62d8aaa0f64ae03efe13bd044db14966e1db8fba85bc2e5c2081de588. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/BRUFM1100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eaab6f84c132d512266eac0a655d97c3363f20b1c19716901a4707d0a0a769. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:10:42Z), 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/BRUFM1100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c63024b0eaff18b5615356ed4720bf93a079c6feb1fea665a8cdbbbfdcabfe. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BRUFM1100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3b93516b67123a8e69bb0558ef28570dbf014b95e15169e5b491a5e0f0e8ee. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/BRUFM1100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217b7d5ec13925fec6ac7b5922779e059b145f1b68933cfced09cc1d81e8d7bc. 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/BRUFM1100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a09e9dc3fcdf4731e4fee866e3d61a7a14683af57ded9c07085945141ab6f2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRUFM1100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5cef4e8d7d5cca4f38a5a56a4970acb16b6096e4ae99545599348b9a42d11f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRUFM1100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb669450930ae72e8db2ac8735d851385020092358c5983ab2896d6e48ff92c38. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BRRD02500001.