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 0xf8716ab310b2d47892393ba5ae44a4fd42edec61414d12548d1a2ec6f522a5bb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/799ee40f-d119-48d2-8779-9c54bb64df72.json and https://artists.proofprofile.net/proofs/artist/799ee40f-d119-48d2-8779-9c54bb64df72.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 0x97bdd1b6370b2145df5df2ac5547b263d361501813e7539c55fa8e9bb65a7490. 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/TWAE31800494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddb29fd08707f6454dd52ecbdb7b08157cc0370f0c0a65ce59010b08d455e7a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWAE31800495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ac461a7cf7837a194152339c8ece75cc3f2d9797c810a72ba4c8009f9d40d8. 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/TWAE31800496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d44d51d05e153285a96b206d3b96c54c8575da1ce054aa95e00a545196c30e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TWAE31800497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3eae439a578ba7a07caee14298bd7ffdb75531c96786776fdc6af373d1c578. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:18Z), 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/TWAE31800498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2655fa2244b7fc259c4019200ce25f19a0eee4f12a48b20add362100d3e76bfe. 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/TWAE31800676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c9f28b5269bfad004c656b8ba2adfcb3c00f795661ff5ef37ca4ebd5c80480. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:10:05Z), 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/TWAE32404238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c381be43f7037038a0984a5683f4f4792952e26e36efdcae1775899f1c46ca. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TWAE32404239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3993e6ec919ed60506bb03131cd18a59f63e9fa21a8ee655cb1d9117dcdd880a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:39:07Z), 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/TWAE32404240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5286e922fd94fd4ef30b6e29609850113c41733108b93e42d5ceb1ef88ecb645. 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/TWAE32404241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebbf08b27bcfe03898236d1af717ec25fe397695f46ab38a593c14d8f1adb49. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TWAE32404242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319e736ca6529ae693cf5c73f8de4c86b514a2b398b78b563268d922c3730af9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:58Z), 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/TWAE32404243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9244e7760e0cb666af58f7c3bf94704c31641a9ead24772b1aaa45b575ebb8f5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TWAE32404244.