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 0xcb8a9f2636ed44a464c2aa7d12337beee91a7b42c7bef767233db7b8af19dfa6. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53687bf6-5d61-443e-8f0f-625a2c899e7b.json and https://artists.proofprofile.net/proofs/artist/53687bf6-5d61-443e-8f0f-625a2c899e7b.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 0x68e0606baabaf3074a6480f568488622654668efe9a1f977f57cd549d233ee87. 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/QZNMV2406910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14d2a4822438c9939635f1073539c15c55b009a210045bfb63f7493335393b5. 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/QZTBA2403467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7012b56a727815dd485ee307b3ff53642c4ed94b36e376c444c7b3abf0e34ca. 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/QZTBE2492693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac17913b3f2fbf98ff627402c1c4c8e14e9e6f28b33e965654352799cd184a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZFYY2506891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2cb1c2e79abc2995d0eb92198d6cf5c4dca6f9f9475e3b447a05b159f8b45c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZFYZ2513122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86bd25e2d8cad8f839577def439bac867d041050e475f732182896d9c2471fa. 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/QZFZ32514025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5281629d6966c57434488e65f2103fe111a2bc07bc55df5a7b0acbceaf17d21. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZFZ72586754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f17c81743a712cfca587cb6b1545817f07c07935c31946306cbfb427474185. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN62518701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa552472390a4bedd798530e95064d43f4e6041fb5c0f8c275614ea9f0371a0b1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:00Z), 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/QZHNB2567173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba00256cc2564baed9e3506432469ceab3fa19e175ae16561cbc6142b01e5fb4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6H2551765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd68681252c71c1729b0625e8887149d9567811461ab56f9d0cfd754e505c70. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWS2546527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7c2c3afebf6424bb6d151b2e3f9955ffb63dd9c84c4c4f2dea2b3e2ddbbc4b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLS2575082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d326961e9b1e0cc91103da82137c0429b239d1effe6275f17470c2c2b148d2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:01Z), 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/QZPLS2575083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5d1247636b11fc8333446007c9001ceefc3a05afc48f8fcb6fece31d45005c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:07Z), 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/QZPLS2575084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e1b10cfd2e3cecc0359c678ebda04a1fa95df51a44d9a286500b1308b1f8be. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZPLS2575085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de37690f61d4120e4195e83e7eb7a9555eadf61df82eed312ee2c3fada9aa8b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:21:40Z), 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/QZPLS2575086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029163021646b58c98073b9edd3a934905a5041b395187d60358749369b83751. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLS2575087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381a3764c50c8b05b068a4102a53ab9e834b4a10649a11a0347fd3f99e3ce195. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:11:39Z), 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/QZPLS2575088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db383a86b0746f2e5dcd1fcbb8a888772af93b51e28c592dbc028b51bb19f74. 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/QZTB72568050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6f99b4cf1f13db3aa7a7808627951cd2835f1126c7846dcd8a2afece074eb. 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/QZZ762523670.