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 0xdccae9630a51ddcd0d8eb44fa25595b3200113ce266c90ab234fd70fb2ef5e94. 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/0eef7f90-a0df-45a4-be7a-c6a446858ca2.json and https://artists.proofprofile.net/proofs/artist/0eef7f90-a0df-45a4-be7a-c6a446858ca2.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 0x6dbd44f0203f10d494aada79c0ed729da340473640be27a7f29f65d0e90ff135. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6L2281582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1b04d8166e8857dbe8713d434429a21009004fa5493a5d9b8d9b7f3c78957e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6L2281578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740e01abe4295e2f8b8bb173bea5533440eee6dfa6ad1b652f428ca32e235c95. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6L2281581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8669ed7623860aef2a5b999acd4193ac17abd55d2ec9b4fc489096cef0640020. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN52004451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cc2c4e93dd4d8022bf6299e2dd9e4823b0760a3319c9d9d14223d0c739ffc2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEM2048596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159fce4cd4066d36d68bf11f61ed37a700787d3e3c094300926300fa8c193cef. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:28:08Z), 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/QZFZ72091080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4d702e69927fd2ee31b9d824d66a13e0764a224b2afa1501fbc65ca5cd27a3. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZK6Q2159162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7286b0cc34d7b49243a6462e643a1a2336fbc5a72c94f85673b2f8b0c6cc2d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZRP52164017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6144aeed9214a1056d72d3fac28140a0c966e2a67590ae6e7ba3c6c49722b25b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZK6N2238337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b32b8371c37ca02c9b2d4679a435fb80b638dce0ec33a8000e62a8c2d22d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ62438129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44cbbe4183f9a3f3e994b97916d4d6a306c6fb98e42e90c085a4d7f8f201cc8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAT2333238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c0167fa65436798212b6cacfe4e6f24adf8aa0da31996d9fe85937334bf5f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN62334207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a114cc9d7b9ce9694cee09e8f64e73da2428d3500957c6515ccc0ec10b7b7ae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWX2296733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3bc9a38bc6da0d95146917161a7d1da82203d1e9aa92f93a6f35f10d221665. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN72288260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec8387e22b4e73e051d28b54430e382f309be3c03ecbeb97e96ed33805666ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYX2298830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7612d28bc4beb0274845bbdfcdccd50e373004885fa7927f824a3fab346cb26a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZPLS2144561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd645d267f097b466779e46a66208ba80bb4f86cc51a97e41638a2fc0fdf76f1a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWZ2199653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbcc58c06c0b1ce89a1fa46f1c7e1012914b372c0b19db022f7c620ad252d3d. 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/QZNWU2196175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f1730e47bc8393fdfa94af9aa3a722f924038fc57fb4e1d09887df5fb3a288. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA52126042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0f0facc87813057cbf2632d41969de576c941a13257ae70f9094b17874430e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ72131957.