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 0x03bb90c6be6ec5bf5b9eac7c9e9f744e9f1777e01b152029ac5ab99111c5ae97. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93c253cc-8c8b-48f7-a780-194d6711d134.json and https://artists.proofprofile.net/proofs/artist/93c253cc-8c8b-48f7-a780-194d6711d134.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 0x1681ce0784ab49a95fde8a391db425657ad997407a03e49650bd9812ba89f89a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZZOPM2106782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb20054035b0f6694540842a954675c8faef2388dbe14420ffd7b19535b10d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZZOPM2114328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086287c0900f71eb2f7467c8613a5f84c74e9e14b94412ba4b79f63f783261d5. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:59Z), 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/ZZOPM2220730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91b4aa943fedf1010fff3ae5dcb9c45ec59d4021cac13be8497f106aae3fc3b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZZOPM2225135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9928d37386c3cd61b422dbbf1a60e4aee0b8d86be686a3b19a37e7e9d81530. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/COSO12200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d7fb37d351a202c832807e98856cf65a5a6fcb8f85b0a13b7e3ca4778fb951. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQX92300740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e15502b16b7d80a992c67fc79e7448957aa451393bd5ddbbd8165f7a8b6896. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USQX92303274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de96ab77f169fcec9a26a04678830c336690b90add8e09c87bac62a834b53ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4DA2319431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d618c29e2e8a60c9c5124b29ed0472f592581edb67eb90f20bd31cbc0821b31. 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/BK4DA2436244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80e6412b332e85f4e254e525ac02b2fb8d7a7d2d753d3fd581ff2f1874f0704. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:38Z), 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/BK4DA2500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b4826eab3752c6db148ca56909747304ec72084782db9d0e9304134cdb4c57. 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/BK4DA2537791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900dcb0cfe37116160104c7f2b01bd2333d2bb4c017724b64e1c47583e944df6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMDA72174062.