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 0xba671c8deefbc75c33dba7bfd2f5ee4b3c6187cb40ca13f21b50d971c87ef028. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d0ff135-1d7c-4977-bfd3-da7ea1e29162.json and https://artists.proofprofile.net/proofs/artist/8d0ff135-1d7c-4977-bfd3-da7ea1e29162.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 0x104366d9e5f8498380d6b3f36453467dae17d57b2205e71ce38537553c6eed10. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:18:56Z), 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/QZWDE2425124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e7316dd289c2ae8dddf9d1dd4396540063f9769fe0f7c952fe5a44a1a79a53. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZWDD2566117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd08d8ed722ab56d32fc3f6f4210e6bfddab028382ff2a4abe43a61b82155c49. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWDD2566143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf764c91e679f25d8c2099e3615eeff5bed6cc7ba04c6db49b4393b84a6833634. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ5FN2572393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4073ad0b768fa72fdd7ae644ff127e7b72b608684fe32b00e84b3cce2dc1cb6. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZWDD2566148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0734613b98ca4523009d1e8f1158beb4263ebb11f8bddbe9cb15dbe6317da0. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:54Z), 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/QZZ8A2451411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f5911eced80010f8a47e247eea7d94bd84699720057392b7e7f23a63a6d5ac. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:41Z), 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/QZZ8A2451422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104366d9e5f8498380d6b3f36453467dae17d57b2205e71ce38537553c6eed10. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:48:26Z), 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/QZWDE2425124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8589d7e76e56bcae11fce9695eac379917189d8ce03748c2f0bd6da70a01c480. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:44:27Z), 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/QM4TX2412686.