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 0x473b9bf72e130a8181a9fefa20f8cc75b15edb3b655353be00767c3d780d1a70. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e954dc5-f1a7-4680-ad74-073f8f12d430.json and https://artists.proofprofile.net/proofs/artist/1e954dc5-f1a7-4680-ad74-073f8f12d430.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 0x70de8052a6cfcc34851c794cbf12ea14d5c8e95f154ebd5c8fc332b603efa8df. 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/BCG9R2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bbf49083cbd1307bcffb7442d5cd4912147ef1cb37ca47e9edafbf0be0a13e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BCG9R2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad746726d71346d220ff5ae036af576a7b1ca1e7cfd9d55c5485a24837cfb5e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:39Z), 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/BCG9R2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe535cdd17eb3777fc455b1de735d7b080c145cb7ba8b69bdc7d5f8ce6ff12854. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/BCG9R2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09bf223327a32d775f1a85f214dcd9a8ea389e266e5169a6624180771f04f47. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BCG9R2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0a5fa947deddc09c0f1533d570c7e2279e0c8b420ef943fe8be35d6fe32101. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:47Z), 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/BCG9R2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358afe8d8813ace10cbbd5d2a90c6908671066daac5a3fbe3be7a9f25e07fc2d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:59:19Z), 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/BCG9R2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f83730f74ace6ee2594c411ca96baee2c5e2ac4b86989dc412c5cf357f9d350. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:10Z), 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/BCG9R2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b71d6056a3afa857ba72f38ed706a930dd3bbabe966eba5fdb7bfa9e0ac13f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:40:44Z), 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/BCG9R2100043.