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 0xfa4149ee98132f2f2f34c738159fbeb1132547520945ddec9dd74a85d69f91c0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f21db356-1d4f-4907-b469-3c74a0f1bcef.json and https://artists.proofprofile.net/proofs/artist/f21db356-1d4f-4907-b469-3c74a0f1bcef.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 0xd29e4bdd9d4cc9f7ffff798883a3c63578c066b23162d671ac452aaab011a1a0. 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/TCAED1935135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d0a14e82d183ab675c5da771a88fa836f22bcbd1d4515f057206acd714660a. 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/USA2P2311141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbe4eb27060e0de00579658739b81a752c6262f69503c711042a9084da1f1e6. 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/USA2P2311142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb850bbe51d6f835076b7aff2f58a5e25aacabaacafc4306380988ed2136477d9. 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/USA2P2311156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fb37b42be56f975527ccf1424ca2ef8e1b3c6f2122e4f9a7d20d75a93263ef. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USA2P2311151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9f4968c6ed96f955fb9f78c3b3c379642d7c9c6db42bee5964c0d19046ef3e. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USA2P2311143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315f89f8aea9f47dc2a1b791be44d39f32c4b8aa0951929e5412b6fc0d78bcdc. 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/USA2P2311149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb33e8771a9741f6126b7387eb482ad27ec96be28111c5bd0ce88cded2950cb. 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/USA2P2311145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bc9f7d507ee4cd2bf1ac36859b8af7faa82ba38316a8489efac7e2dc6a0894. 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/USA2P2311147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74f351d75ba605aff185f41a123b1e37770f5fe83f34a4988c4268e8daa281d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:31:50Z), 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/USA2P2311162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818dc95d0a9c29773c21bd7ce59b19e1f5f9e4e57c2b7b85bc89d4273014c4a6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:10:07Z), 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/USA2P2314519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c446a96676fc76c672b796ce298ec08d22a3eafd518b06639fe27feb296dc99. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:58:50Z), 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/USA2P2314523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3228a5f695f2729bd5511ff4102b24ceb09cacecb847ba86d0d23d9ba45c2200. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZPYN2556337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eaecb2e25514ca08fb0b4ca550f749cf230fe48bd9527fa698bae7241331b4. 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/QZMZ92545749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634787e3464951475a606f4ac7864dddd4cc31745aa641be9bdde8b976788bc4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNJW2571081.