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 0xa8ea0d510359c2fb2bf3109f86e1b04ae97148a368a939b21407f2c688445f21. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25a0cfed-6ed5-464a-a6be-bd940073390c.json and https://artists.proofprofile.net/proofs/artist/25a0cfed-6ed5-464a-a6be-bd940073390c.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 0xb7c7d824379b2123b23983dffeccb826c57a527f000b1549ba07eb69e589fa90. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:20Z), 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/USL4Q2193727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69acbe4728e95368fbae49ecba6587ac60dcfd9ccbb17e9df075fe36318a665. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4Q2193730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482b2a87e53b6175e80d831d9f4010ecc04a855392d5ad7b598138412a7a6fa6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:52:12Z), 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/USL4R2100875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7db6241ef9e0dcaa68198c5508743989fdb06b637f753082faece57b2909cd. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USL4R2100876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f3dab56348b813e79dce57d6099e5ef5b83a468c37d0247686f5b4a68ce828. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USL4R2100877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc655ca134af784d605fd1b9396ce904a32f6d639a9653b0de2db953086d02e25. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USL4R2100882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4185cfc5fe5146f916372dcdcd2677b8fa7dd293b514ae2506b0710cee2e15. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGH2292312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8b8febc05f45aac5a14252c00f05005bb4c771c29e449b051b9d3384c33c00. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:35Z), 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/USCGH2292314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c01063ac380dd4d5cfc924a396783e6deba655b4aad0fad3358994f8c3d9e33. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USCGH2292315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe741ea557989162e5392bfbbb57526cb26e424cc1883215ac2316a0934487a28. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGH2292317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974ef9b9d9889e2cd4dca47d68881f8d373de2c2ced7c6868719558e6fc423cb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:58Z), 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/USCGH2292318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e4b899fab131f3b49f9d8841247175a8c7edf575d368f9dfc8cb5951be1019. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM22201406.