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 0x4e59662d6e7c25324d7094c2bb0ae769b3888392ead3f75f2486938682501e8f. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12639f27-eea9-4bf0-8eb6-0c59b7931561.json and https://artists.proofprofile.net/proofs/artist/12639f27-eea9-4bf0-8eb6-0c59b7931561.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 0x62dfadc773f747227f43818ccd78cfaf34f05ea982923563ec09d9fbb78be636. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRS182131906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf905bc1548024efb6964794aeb3295dd45eb8f06ca802346fbd17dda4de8b7a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA072316042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9167347e5919055858fe14d4e99e5b90641857b4b28ad9533ef8fa2285a7ca5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX762124782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e437fc81d0ce7f896afbf44aeacf577a11a8af44688b9966422e22fbe9f784e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:03:35Z), 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/FR59R2404679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2f33191007736d2d5715361ea7f1487cfd755a7406027cb30509a1b4781ab0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R2404680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71e43a038f23dc7f6ed4989ae0a909381deb621da11763e24b761e318d6eb66. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2404681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac3f526d3929d4a28bbc4f13a82c4358f27c1aa6686aea8611947edd4346ed6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR59R2404683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3419329c5f09a6f6ef47b44c0bcf1af5ce45a67b6e7592614499be5dd66175. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR59R2404684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabe91055f98ba53b6443d9527d6883ebdea303dc321a896bc0beffd7d9a6a09. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X42404790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703420a1e3a56996ee84c0352ecf238b951fb01f76dae992b88597efdbcb295d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX282125181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dfadc773f747227f43818ccd78cfaf34f05ea982923563ec09d9fbb78be636. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRS182131906.