right|thumb|300px|The evolution of the rune in the elder futhark during the centuries The k-rune (Younger Futhark , Anglo-Saxon futhorc ) is called Kaun in both the Norwegian and Icelandic rune poem
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 0xe680b3df396d80518a24f584febb9046e40e766cdf5c572c44b10e47f1bca4be. 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/491a052a-ac70-4b34-a804-141717b1c903.json and https://artists.proofprofile.net/proofs/artist/491a052a-ac70-4b34-a804-141717b1c903.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 0xd1c5395f1fdba712d292c06071e229f4b81d4c6a2cea9515167b836ec6bb39ff. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NO1941706030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513eea144c88898cdb2275df11fb8693580b53ed248b44c961bd2732a195fa59. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NO1941706040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75a06fbdb29d9381ef1679533cf0ba9b2d454f166f7662cf31b1b1c9b128030. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NO1941706070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812ed3c8656b37411b4777291483912169a5136728c6e59298c865ab499198da. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NO1941706080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19654f1cf2bca08749ba2f6af7c193a2893298803efcf8a713d4584657d5f44e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/NO1941706090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ee20ff787b435d73a14db403bb3ecf3c8ecd84f6b95a6ee62b22f30537d50. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:40Z), 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/NO1941706100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b5ec8c487ebecca1836a7ec48cc1b966496b6cff560eb6298c0d6cbb59f1a3. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:26Z), 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/NO1941706110.