Celtica may refer to: Gallia Celtica, region of ancient Gaul inhabited by Celts Celtica (plant), genus of grasses in the tribe Stipeae Celtica (journal), academic journal devoted to Celtic studies
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 0x78f0b6d8bbff6f5036f2016f5b02841e6eb2e7d4785f3b34b5904a173223b91a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2caf5706-8fcb-4800-9bf7-7cf49b301fdb.json and https://artists.proofprofile.net/proofs/artist/2caf5706-8fcb-4800-9bf7-7cf49b301fdb.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 0x8fdb2e972261bdfedf65649acec3dd2a0eaad9909ba276a8055278b757726a6b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USX9P1027374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0283d9956194f21062be29fd954011110c83f7bcae7b748a47f14ae25b2972. 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/USX9P1027382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae438b54c2e779fc7d1a7b5833de786c0e5f309cad0b15c720d0816cd5cc01a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:27:47Z), 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/USX9P1027387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fd69a2d25fbd5d5d3f1e53c234466ba3fcbcdbd14028d9fee4262edb9a4b38. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMZCL1250052.
On a Cold Winter's Day / Bells of Paradise
Reels (Rolling in the Ryegrass / Gorum / Red-Haired Boy / Arkansas Traveler)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0492c434175fcae1e49b99374a207970b508d506b1408dd3b38e2a60ce605721. 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/QM9A91666960.