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 0x074e906e8f239193210c8d05323455c174088b2f03275b039b06e3c4e4b0d708. 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/031e8b50-ec1d-46f1-bdf4-bb09e4173a6b.json and https://artists.proofprofile.net/proofs/artist/031e8b50-ec1d-46f1-bdf4-bb09e4173a6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choi Sunkyung`s Ballet Class Music Vol. 1
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 0x4ffa04651a53835bbd82ba3501aa8d3a26610eef2c68247b902db39c3465ef49. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/KRRAR2111687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffa04651a53835bbd82ba3501aa8d3a26610eef2c68247b902db39c3465ef49. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/KRRAR2111687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1509a4a971c880acf74e1fa94473ae8accbb621b65755bb37f31c025d32e6b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/KRRAR2305609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa898d44a6cd2d9758b94dad813054d56a722514888ff1b1471464fe043330128. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/KRRAR2305610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468e10d576ae32b32fc009067c6f65c04883e8eb940368c40566d43e0ac93410. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/KRRAR2305611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13b48bcf57678574460beb5145a647e89c268845e80f046ca4e4f4297a35c15. 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/KRRAR2305612.
Battements tendus jetes 1 (vol. 3 barre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876868e63dca962771947c10910f280908a7dd61b5409662343faf9d0a738f39. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/KRRAR2305613.
Battements tendus jetes 2 (vol. 3 barre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcf22e9ad00f86cb66e3cf4ada16a7c1015bc78b5469b2c2f1fda68213d4935. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/KRRAR2305614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869f10d1ceb26f541f40e5a673c2de7b96244b99ea258765031415ee69672339. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/KRRAR2305615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5ed3864cfefb0a945a67b7317b5ff43b51daea6e227cfe67e9914ee829e6f8. 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/KRRAR2305616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3f2f223b888a462b9ed6108e98adfc23e53e1289fcab919ad0117ee3259853. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRRAR2305617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e762c67078249edc98fb09ea3a282ef8ac37eadfcc9c95e15aaf03f45fdd0f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/KRRAR2305618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bbbc2f3fdc17fa0ba66d91f79b0d4e542563ae9c058ca6e695c61c4d15ddf0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KRRAR2305619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423788e4823ad6c5c0bad6254b1868f8cd5cdf073c76ce75771962ddc86ae725. 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/KRRAR2305621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6425f94c01a8ec315a18f9804449799d15cb9c9e4ab9bf2761cbf4371f9f97e0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/KRRAR2305625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850c76c1a9bc17a1d1d288eb39035295c2a8c77a049667d114b71a95da2996a9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/KRRAR2305627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec2be420a57688cab49cf23f45e32f670cf054354bb92acaa98ad37d96dff3e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/KRRAR2305632.