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 0x17cae568545ba4bfec49c7e45b201920900b159f388e2a90f9d159dff713eaee. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1640553b-6cd1-457d-a1e1-9a932e73aa8e.json and https://artists.proofprofile.net/proofs/artist/1640553b-6cd1-457d-a1e1-9a932e73aa8e.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 0x870c258d5dde78eff4e6bc5156588a257136806afb3cfac6903a5a5191592f00. 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/TCJPN2028980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d8ea81a34fc5acb5e00c45adc3e73dfc1fa4bfeba281ba6d45090e6ff60c33. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPT2293890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d49bb1a71185dd7a16a2493b8ad02b6dd0a05a3571c468f6364060eefab8cd. 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/TCJPW2332346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c810906a3086cd998b68fdaf7cdb2fe37894ee0b2d547a49d812d0b221e8715. 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/TCJPX2384461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5e570b7a244f26a3f7ab5b9eccf45079715e74370a99e609c29e786ddcb947. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TCJPX2384466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014e11f9679b81577bef5a6d6742f289dd11064f70c04639568a564ebbb87c60. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPG2598931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db5e9c648e032eadf23925ad47582cb60dfc863f7b412dd87ff4f4c35f2e1f. 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/TCJPG2598934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b5a03fd740ab6782b7879c315328467d061c2653be250b8b54fdcccbd3bf9c. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCJPG2598937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343073d1df784f2425d88680f9e6546a6edbb32f621976660cb2b8c45ec24780. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:50:56Z), 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/TCJPG2598939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd21cc005fd34e7c74199b87e15eae993cf258ab321b4bdf19070b4dc096a76. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:06Z), 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/TCJPG2598945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c715a0e4f1a1f5adac18c262d7e7cca39d5904fe973a802ab9395c01f1e9d57. 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/TCJPG2598948.