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 0x97d78514a75442123d797ca4234928edd4f8cdf38b941ba3615b4eb37efefe19. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/398ffd34-5ca2-4198-91b7-b398952bce88.json and https://artists.proofprofile.net/proofs/artist/398ffd34-5ca2-4198-91b7-b398952bce88.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 0x9a97eeb306d5028d99afd71defbacc9c3d02eca7ec03a0f0dbddaa23a4122f14. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/KRA380900610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00713a633501b9813add302a85e5e65473d6065afa6ba6837a64f2d11c3c9518. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:18Z), 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/KRA380900612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a4fd08da56c1bc6f7dff42ffdf36d3cb3e661b7f009fdfabd367a6209b73ce. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/KRA380901455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a474133f24a32e683cab26269c8454f43f8df4bb50adc4cee36a416d5bdef08. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/KRA381000312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f20077d48c847f95221c880ca713546763475c02959b5903a09bf31ccff870a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:41Z), 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/KRA381000315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b91e5a09c631c2e967697ac4165a06fa74d1e9699f8fd1725430144d0eb1e37. 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/KRA381001070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511f894f122f4316e3954ee2db539c91f3f4f78e725d9d4bfba76d1ce8284cdb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRA381001504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fcf902801174b8eb1e1a99212ecfa036c16c59791cef0b3e9907d36ba910fd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRA381001508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dd7061482a4deb8c807d51406509747cd1d6a1eae1e4baed1ef5641f52d8f5. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:15Z), 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/KRA381001512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed55d929fcf30fbd0db8317df901fa0ff23b8f82321cb91cb11d43163ad6180. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRA381001514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eef4f8121a46aa1090eeb88740ecf2003645a25ac8419b5797266aa7a3ce078. 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/KRA381001515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd877928bbdc0e52710eca382a54628eece7feab4aed6f72c950d6671229e308a. 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/KRA381001516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe22fe89bb6210403e8a1508eef66b72d933e3f2c56a11f19431e135b7870eb. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/JPB601138501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6191d0ef08372d8eb471f551c838635cc05a6462f444f8008530a2ab9fe46c97. 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/SEYOK1210312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb7dd73ace938cfb410cabea9e55eff1bfc5f2a16dac206d0e6db12e4bb9ac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEYOK1210313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7904305749c228a9ca5c05f266af4ba2c3b6204bc5293849f4d3356814436ba. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEYOK1210314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaabaad6ae0ff0b607f73f2fb4a43db20675c2c20f605d7d9c14a0fc1300ca0d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/SEYOK1210315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83ed56d65315b41cc97eb88cab9857491ef992c8bb1113769b37b8c933ddc4c. 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/SEYOK1210316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137ec3407eb0f06dfe554bdb1d3a2efca5d457ec04ba1690249feef2dac73bfb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SEYOK1210317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c11a39fbc80fd7e7b5f9e8f5c4de6ade8f37f61fab37fed0d65e39ccea7b62. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/SEYOK1210318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a60d8c3acb36e1e274f8cd3e3bbf94924c8cfcdcc38ed0516f2520e55ebb5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SEYOK1210321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd8f53f302b684308b5eef2be09043a206b8634ebc9e6c26fe481a29baf9f8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:03:24Z), 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/SEYOK1210322.
AFTERSCHOOL 5th Maxi-Single (Korea Release)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02189bb09499275af6ffe4629b89a4f0b2d643b29d024da1ada1fd0081954685. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRA381201088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3289e02948eef70b43ee68e11a7be27de02672b411641f284ae4af11a1b1793c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:15Z), 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/KRA381201092.
THE BEST OF AFTERSCHOOL 2009-2012 (Korea Ver.)
After School The 6th Maxi Single 'First Love'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4be99b52987c749379cbe1c1cb6e09ead23f94db6a7cdf0e7ee87e43906fa6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:58:25Z), 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/KRA381204567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb295a12158ecc822d852d30d3c630a871ffe1e89a27a2a060720f2289f595422. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/KRA381204570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f8de3b70cbb5e7adfbcdaf41710fa61c79c9a199c751cca902bc11629bf342. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:02Z), 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/KRA381204572.
LOVE LETTER (feat.ARA,Hye Rim,Jung Hyun,Min Hyun,Dong Ho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6e704b8bcd7c2fd6bd403f58a9b3f4fcbef87d0e7a9d7df4c35546905dd13a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRA381002309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c75061e9a75ecc91fb7cae7b8bffe6668b74198075dc82d0150e5d332d03bf. 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/KRA381002312.