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 0xf0a9f40683d780dcde1409ff48ee383df73a31b08c486622fe5fbd491872b2a0. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/798f6fcb-6800-4a36-bf67-bdf5a1db4846.json and https://artists.proofprofile.net/proofs/artist/798f6fcb-6800-4a36-bf67-bdf5a1db4846.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 0x7f4332f3053dddf4ea252427bf1e8864b364ca30fd766a99f67d7b7655e99291. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7V2430842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b9c0ff67063aabdfc04d29b3f7041ab09b09da7318b87e767fc077f74d876e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7V2430843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bbb33827a9ceb9fa241f2b36e21b5d4dc2bc3439a1dba78258087912931ebe. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZZ7V2430844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224f3614e5b76439108d1c5a9de0ef6615532853d072d085317b16d5c8cc5e3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:32Z), 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/QZZ7V2430845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ea94aa6f3b41a13f61228c9548b2231249a1f74348dcd9d8403ffb9ba236e6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7W2462188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b9a6f112143ff7d3f32c79ef11688a3fe9448ed09dae13136233703457dcad. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ7W2465727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6094807f564363acf2aff73cfd2fbd7f747e44a74ed5f0ee8722e31c74d54672. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA2526454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423a6f075eb72f6627c73ed2d34f22428d4d7c30c3b4be4efe83ca4bdd527da. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWS2530045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c0be0cda894aa7a7e82bbd00c059ef49c0ebcb45bb74826db2df596b13ea19. 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/QZNWW2560059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4797a3384f39814943e0d016ab66832344cdb2d0bb83b6f6b82ffabb2cab6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP42568968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d7ad812582bf1f1eb56bf54a1663bff8cdd8eada00ee9e2318e0e8b666f1b9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:13:55Z), 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/QZTAY2556294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6390ae85d3502dd0bc5aa6a516124a228ea9cae7eef9ce07e7b3ab731009e2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:08:15Z), 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/QZWFR2597056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8e7ffd6e2400855c8eef29ed1523f85fe6ce5006a5822bfc1bd570a21af296. 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/QZWFT2533932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b46e694789a8bbee545d57e268c7d01bb873b90cf1f352a123e46e98f4cca. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZZ7T2517573.