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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a48b00307a1e0a5393dd4e7927119f60884dd113cf16034b2ebc559821b1c5. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/039ea51b-7504-4989-8a8d-ae11e4f00be9.json and https://artists.proofprofile.net/proofs/artist/039ea51b-7504-4989-8a8d-ae11e4f00be9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Hungry Voice (The Song Legacy of Ireland's Great Hunger)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf8c47fc8cd364966f2e604939192b7ca7eaa39cfe563d7bd0ff20b45fd376e. 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/IEABG0400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9c90d769a8a11c75940190d42a8f689a54a076d2b320e9d12f23c1a38f7519. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IEABG0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21eded59877e89f02e4a39e8de892b0f981d8e6f023002ebea6c4c426d0514. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/IEABG0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aa082eee9e0d7ef377016852532ca4f0d90b3b5484ead356f6068cbc032e61. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/IEABG0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2509bf847f2f7587bc55a8312c019ca727df6c4bfc586bd07cc009063c1b9209. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IEABG0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6161b2e72d12d0380b4dba27e2ca99e5881dcace135b13fc8549e364588028d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IEABG0900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a1eb4686e934466e90f73ab1b274a61b78c6779dfcbafe36a7c132d812a06d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IEABG0900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd687e27e653a4d182446eb3edc06793811ae7557d4ee1123c5a743f356d3e48. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IEABG0900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adf62e7b8151f266456d964e4b16649224ebaa3ea2bbf2aa8247cf417c2e32e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/IEABG0900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad26d795b6d6b977d05c1280ddab65b2f360ffa40ea7ed0e912725477616b35. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IEABG0900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1085a790d603370085030ff0e0f7f7731198d2a88d578b22296ce4a0a13e7926. 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/IEABG0900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5f1e99fc6cefe4a5faf088c1e694263caf3186b0fca0a24d2fdcb31a4aba62. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IEABG0900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6ffc4d2a0c365e9e877d3b5260139e80ca754601d1feb9bae26ef8ee029d07. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/IEABG0900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27022f10cd1b9581163b043b1588f13f75ff382e9e61a80b74d598f6b8928011. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/IEABG0900033.