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 0x095fb472197bbbd9dcbf5a845cdd8300a4b77e8930bb195e136716dc0c303065. 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/52a254db-11ea-4b18-b28a-832dd47def2f.json and https://artists.proofprofile.net/proofs/artist/52a254db-11ea-4b18-b28a-832dd47def2f.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 0xf50b15dbe14731d998ae995f7de879325a3618829f906b2184f4e82b6814b9fe. 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/DEA348700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf175375954ae9361f1f1effa41d6d0e9bc869ca034bc8969415b2d3568565399. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEA348700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c1a9d8e4a86dfb002fb5df6b35cc93dfb5d653f2c815c22e31be4f9ab80890. 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/DEA348700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d59c4ac68cfd29e5c7c9e10a254c9386170a281bbb7433738af54b2e01be5b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEA348700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d6d3ab6303b793a82f800600568a9f3634819200ff5d5e5e731ab489db1907. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEA348800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638534a6b52aeef09e0592bd957fd1984937008aae429a1dbe9483050afa0793. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEA349900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf175375954ae9361f1f1effa41d6d0e9bc869ca034bc8969415b2d3568565399. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEA348700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b576b215a15f703c469da25364592003695ae7189f5d869384cf219a8b12e5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEA348800936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d59c4ac68cfd29e5c7c9e10a254c9386170a281bbb7433738af54b2e01be5b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEA348700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52bf87f02fb46a10c0bda1b40ca0e0b005194252377d80fc8cf863d94e9e33b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEA348700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bda24c06b3c9b83448c9f75d7bdee86e099652b6adf88b5e415a0f2863de135. 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/DEA348700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1b260cd4d0fdbc35c728034d28017d82ae07dd7eefdf496afaa0dc3ad8537f. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:08:38Z), 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/DEA348800937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cc59bac1da908e948e32abef1688d58c6dbcc50472948aca14a0bc0909a634. 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/DEA340601689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd965a3db1a2e80fcd30cbfdf96ca93ab1543eda4fc48bf5d5674e55ff0dc86ba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA348800933.