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 0x3ce6f7ad60f59647f5ff828dce312092a0f423f8a415ceef3f5503122898e4a9. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65bd3246-a44d-425c-967e-f783b2bc8237.json and https://artists.proofprofile.net/proofs/artist/65bd3246-a44d-425c-967e-f783b2bc8237.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 0xb9bfa7f2ee7799ebe8714fab826fb9817b8273370c9cc41d487cf9ccf1db4d56. 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/ITK252000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e424f0e2c8a7f13ef457b8e17de89bb6eea90d0966e3d38f2b9ad2c30b3928. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITK252000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54bbab02a966c5b0a5f75b6232cfbe83a810ccdc1444d643f19cf55f7a03632. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ITK252190242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8861fd5633a37e427afb9195a697235bdf691f2457bacef2b67d87c03ccfa91f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ITK252190660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e157e9323a1e8f5f36fdebf0e0adfd47668fdb8ab2102ed95146f933b01d0a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDFP2041779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69532c918fd9a4e45ac6a6beed065d8d9ee643d08be9b1af33c32895bde0722f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:41Z), 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/QZDFP2041780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d7045c4df4eb1cc9f73d6fe15ce6b94cf414460b01b3d7e42caa0b1fd88713. 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/QZDFP2062917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f967717d2fc797c8a78d62118371902f464ba89419a20cf373cc29308923cd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDFP2095969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d511ed82a09e73b5defa2c38a46f79444b8e69cdcfd9b3e2298e0a3955f79c0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDFP2123673.