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 0x518edc1236c3405346c5fff6c4116e61c13929ba37af29f451255f3d881102ba. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ff5c104-1b7a-47e3-8e57-6207e7f4a6f0.json and https://artists.proofprofile.net/proofs/artist/2ff5c104-1b7a-47e3-8e57-6207e7f4a6f0.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 0x2fb9b59b5b9917a4e0fc16118b0ea50bcfd46f3007bcbe7f5ff4e73bba691de9. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FR59R2231710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca8c6218a8b3f88d0c5bdda6349873ebebcca82adc9a42e120c0b24270eb48c. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZNWZ2212788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5370caacc18bad3b218ad45aee72d5970662585ece2ef92388811d80c7a1ca7f. 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/QZPLS2206691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50a3059dab3a5e6d97f9090d0a55e1c37c745971b548078d74ba5acf6b0167f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAW2282448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2337c616404904a3725559c17b3af6c441494384d694a84b4d85f39d19ecf960. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ22335844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26938f21cb2ba6f17ed0f2e8c6c8b6d42443b160c8c73010c14612f452399c7d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA42363936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2a022e6323152e7fbdf15603c55dab8e674aa039ead8edf1662d09fe7828c4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN32345365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf927b5ea1437a10b328628e915c25ae419ffd7a6891f51e604e4ffaadc3b83bc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CA5KR2355276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af389fabb3c0175f47a0e874eb3c3cd24082d33c98d7e6e4318925611d76c76. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:38Z), 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/CA5KR2365423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17c0c1e1853e27ad46b450acd13b2120a60a933929f5ed068faa93a46a07662. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CA5KR2371901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a7b3857857d987e276c9de2ca6cd86970797df843f46dcfafa7f05061e8ad5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTAY2376612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b59ab82b157407c68d03c15f036cf834e92ab32842cb65f7de1184fde557642. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZTB72353178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa592776a439dc2c2c6f317ede6baf0308b31a8246c20bb0f8461ce802ee34cca. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZWFN2368877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272a29aebdf942cc6a7d0da20240681a2c59bc165ba7f97f07cc6f0bbb897fd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US83Z2458514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f02d28bf3c007a1d7ba319826b461bf0b63539b4bdc10639147fbf3b08bfcc. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFG2453669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2429e88f785852c19b1371eac08142183c476d09c467b5a1bacff54c71149e98. 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/QZK6L2532414.