thumb|right| Kulgrinda by Medvėgalis hillfort (plural ; from the Samogitian 'stone' and 'pavement', itself from 'to rake, pull together') is a hidden, usually winding, underwater stony road or for
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 0x50e5a2846924e022e15e141b8a38641c34c096316337a2781c4e06424b5e3504. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/beddea97-83d4-40be-a835-5166dbf86df9.json and https://artists.proofprofile.net/proofs/artist/beddea97-83d4-40be-a835-5166dbf86df9.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 0x1b4a623772a92bc172fb9fe2e87b6abc1dca4700a156cbddc80091bffc0c4f3f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FRX202044610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558f4d6a4d37dcdb3967901ceb18c4d07511ead4fe1b70633da7fe1f33e66cfb. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FRX202044613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1487cfa92864b5e81e1c30aa25e1d5862cf635db8a4db8c06cc15768a87a2637. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/LTF791400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa014f0669fbf3bea5813f8faae46cd846fe2020311bc97dfc06576a11e217f6d. 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/LTF791400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a2ebe0594b38f0965e519427dab12425bdc47b974dd4f70cf471a401fbc431. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/LTF791400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f9bc5db6ab99dfab6890160e19c88bbe0af4abe172293e89235abe0a42d680. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:10:56Z), 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/LTF791800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bac019744dd44897cbfffca8732ba8694966669a2768ea25df6e169247ab98. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/LTF791800016.