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 0x2baba7e2c86ca26852a652f7083bf88bf14c12d3d574c8f978f5cd9caf6180e4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20dd372f-da51-4b07-afb9-4a502d8ceca1.json and https://artists.proofprofile.net/proofs/artist/20dd372f-da51-4b07-afb9-4a502d8ceca1.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 0x73d1265b45409819a04b079271da1cb3f8782ccc0ebecae9d9cb2352ea3bee8f. 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/USCGH2495973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9a8449d264606f8818793773827c33090b86c34452200851bb52c6a018fb07. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH2495977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a89ef955cc186ab632c6830f3e5e90a43e9d35ec31c0224448726f1b1181348. 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/USCGH2496020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f1e0f296a0dce9bc722c69ba24907506181bbda0af747b336ed0377100e9b9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USDY42477046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b264733a5944c84b44f95cea2799138e3baf860fa87a9a78198c4521ac262ba. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:02Z), 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/USDY42477061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b08dc47b78743fb32386ad68312326a90c7cf2a62d3e2081238e3738866ea26. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:37Z), 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/USDY42477066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96f44ceb786d224fddf71fee8719a81de3b7f7bbfc84968d94e2321f7747f78. 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/USHM82428532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd03e5c34b50e2a44c34fbe4640b65291da8b6383155c4a04f990d15a2471e1e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:44Z), 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/USHM82428533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2397d9d9f6c2679caf6e8d7bed20f8da94130a661e6ae23b8da6102d627993ba. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USHM82428535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74024b9c70753dda36f6557847ab85c50981551c6a5e18ee24bfd8c8f9342bc6. 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/USHM82428537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1de774541025e2614702c5e342720fa19fd64ad4d3bc928e900a87cf0dc382. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:01Z), 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/USHM82428544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbf14bc5a4d0d56da6432311dd6417ba1d79812d216ed81e9e8b9d0755c3248. 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/USHM82482279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f819950443e1ed7cb4592e06a470e569bb83456eb402b6466d361e552a73a0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM82482281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d54ea0785d22f0f0c31f0a0b11060f70b3f46e069507c726c13c0859d19f26. 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/USHM82482282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a940ad389dcffa6ea4e85ef7c7bc0dbaff45d04999125a4fc08be0dd43b7af5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM82482283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deec86f048f726eed8180691f1e4a32f596172ddf17fd9eed67a8a797c42575. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM82482286.