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 0xc86ea54fc8b990ee3d7bfe52cee80bfd36a28a3011fe2852c9590844b78b65b0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dad9d948-723b-4bb3-b563-5fdeaaf1051a.json and https://artists.proofprofile.net/proofs/artist/dad9d948-723b-4bb3-b563-5fdeaaf1051a.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 0x083b998151665a6ee5dd52dbb4554568384cfda47646fc7cbbac9f014eed73c2. 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/NLRD51632157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962d8538416155d2061940866c38f8a5a7ff6b5f7446b224305be8e5b9da04ba. 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/NLRD51632162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ced1fdc1c414c2e900c30ecb7d8ec035442f28152af6b0fb6dca02f033011e5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHN32056999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0fafc12c2e37eca66c3608e073cfae373a58c71e4620cdc6d555ddb84a3ff3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:59Z), 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/QZK6J2087032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068ab3adf5de0484172227e42660987074e02514c3898b91432a3e3dac85cafc. 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/QZDA52247743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08248adb3a6e50706677eefd77444d6e672a3a945bf88633b18f1b1813e8ba60. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHNB2282137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c7a3715b6fa97c0b5176ec139a41d6f4095db53ff844d9fc3f137beef89802. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMEN2245614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cefbd7f5136d4cdf10a98f609681974d09240d67b5f3eefe37488b4a3a48b4. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/CA5KR2331148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb00488c8dcb30e4401750b7121fbe4cefb595426c3adcbe15cea29fa6b0da11. 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/CA5KR2354370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ed98893ba961784ff50c6eb0c6d39b3cf5dc3165f0268ae8eebadc0832e807. 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/CA5KR2484174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd88fb81d2e0b41b0444493064a94251f24ce7c96840b85b74285f73608e47b8. 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/QZTGW2400503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f779a9e5df8f52e658fba0b2672e29a934213121007b2fc32e99c1a02ceec8. 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/QZTGW2401133.