thumb|upright|A traditional perry (poiré in French) bottled under cork and cage from Normandy Perry or pear cider is an alcoholic beverage made from fermented pears, traditionally in England (particu
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 0x05be21606d8d5afada622b61c2624aa966d66d42336cef69ae5a23fc16a92613. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9e00645-4199-4041-a1e4-db04fa9b895e.json and https://artists.proofprofile.net/proofs/artist/d9e00645-4199-4041-a1e4-db04fa9b895e.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 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 0xf95abdc158d2c3064ed4f097be3b552e4661787472b2dde74ca3d3045c52779f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/KRA402000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22eb2db0f17fa5b4b8d51a77c7d0652e3fda266ea59b38b5c5d3c6e597d2bc4. 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/KRA402000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6314554b159866d221419d2e8ac8be5d0470fe31b57a435cf6f624fa938450f1. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/KRA402000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072e9e091795a50c1fbd7db09db5f0254ec32bc362c8d33baf3f9c143a3a14e6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRA402000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2181e54225cc866b5921cf74ea8fcb27a224d8395c6a15ac97f23ca263fed879. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/KRA402000194.
비상(飛上) (Feat. Jah-U, Hoony Hoon, Day-1, In-Chang, 45 RPM)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f936908a7d23241d4f1f15fc97fd8dbdfa29dd2588468692aef3e738efcbe9. 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/KRA402000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc968c1b8011efaa667bfb49b6ffd366b8703384d5eeef46b229c9d443c4cd2c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/KRA402000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b29b6a7b26879b01d92364e0db8783c2678ede56c1da21333b0e3446714df1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KRA402000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b84b7eb355f474577e4d72a85b59bbf701722c4aa5edb2a86f4f44c65a65d7d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/KRA402000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6177dae809a8b9fa1900277d3d2fe2f72b1745be1450106ab1ea88e827950752. 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/KRA402000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfda33adc4eefd0e05cff813dbcd132cd1d071b16cad511581c399b69fff62bf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/KRA402000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53e176eb9509fb3f61414ac692bb34683f34287e29a640499bb1e90f2b6f566. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/KRA402000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561cd4d68ee69e4c6c61574d62920c00df7893af6a65087b6c0689c0966de3b7. 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/KRA402000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33aef37682e09320da675facab18c8dd83be08997f91554bc6f48dd6204bd1b. 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/KRA401500509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033554cd9dd73ed23b6573c59e28e456148646d37ce77022f3e5a71728e0498e. 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/KRA401500489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa628b4e62792c5c6ebb7ccde033d98290b0e5d014fcde394fb5bdad572ca3424. 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/KRA401500317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ad5bba25582122ef5d2d43d2dda43705bbbaab7ad1743eb5fb35ca58460978. 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/KRA401500220.