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 0x04b60e93ff481f165c695c96a42d23c1ccfb5e691aea53d7ef6225cc9e5a60e8. 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/28b0f2e2-53f0-47ef-8891-e3d5e8221d78.json and https://artists.proofprofile.net/proofs/artist/28b0f2e2-53f0-47ef-8891-e3d5e8221d78.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 0xbcfe7051c947fdec0c7df0f98a47a9b6c3f7195f187c1e3c7cd6fc06e02609dc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA141711163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14db7e24b8bcb8eb8c29b345a3dfa8450c8d0a6289c0b7f72d47b26910e8595. 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/AEA141711166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9c2ec5c4e9505e8edf3b1e26b6a83cb791b2f91e806a72d9228634b1649158. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:40Z), 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/AEA141810561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62934210e96b504bb442647dda1f0dfedaf81d7d81a24506aade16bf50e407a2. 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/AEA141810505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfecccc1892cbe08ec95ad557d227630a5ac9ded807877c881bd7c0b2426bfa. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AEA141810552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7495182440f6ae40d180bb82057fe11c55055828eb80372b797838462e9531. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA141810513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d922f7580e609b001cbcece13b885151c77fabbdfd2bbd720e152ec4e4f035. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA141810511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3b9258f10a36816ba61eb59678f289619dd2ea53e7496d225adc0181c15d7b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/AEA141909944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d3d3f86966ea145b6b80000b5b411a6eee8551d5c7accbc9ed7ddd8859eac4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/AEA141909678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd403bf09d278a1f2198df10f1ab87d91415bdc0c98b7b9debca8b6adc831f43. 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/AEA142008262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f80c44aacc3e01d0124ea978fbe1b444a09645e80b065810add388b56d60a1d. 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/AEA142104123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d0949ea6167539dd5ec956e5164be01e344c6e03c49aa76578d4c4b8549ec9. 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/AEA142104867.