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 0x137a613b0172921ced9561cde97db65fad775a7b912fca7ed464b6c624ef5f49. 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/e66adf41-bf8a-4d48-b3e9-3a322f88b1c4.json and https://artists.proofprofile.net/proofs/artist/e66adf41-bf8a-4d48-b3e9-3a322f88b1c4.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 0x8dd3d36e0dfa651a248b43959ab6973636f3a66bca0f623d2c8ff6f2df1ba6bd. 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/KRC772300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab77f20a61298df97f079ca7eb90a7f88f0c646d1dcb92c6ca0cc1984a7039. 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/KRC772300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f746fac11585575f7e0ad48c4dc174b0749c18f32e7df5a6121d1caa36af4a. 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/KRC772300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03623c0586eb0c14f220af522cd9a3f3a7939c4c853ecb500e62c9ae71dfd343. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/KRC772300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2219064bd585ae39abcb380df87c85cd24fb35aab40783fdf6e49c86b53f0a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KRC772300287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ddee70f1c32ae9afd6fb77b1d405b6ba2b9fc9ee35b9bd43137eafef46f131. 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/KRC772300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edc27ac97fcb33abf4d9d0e2b3350a427eed59e872ebfddcccbda2803b1e6ae. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/KRC772300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfd6d0b30aa5bd42d77f00c293dbef05c3c0489f80154be6352a90cb13e0191. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/KRC772300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c4f32beb000a6ccb9635f584c62f31c3aff35fc232340638322a63f68fa9dd. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/KRC772300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290427b14737193d0f896c68958457027390d2e1500b082ccf4c9b48f324393d. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/KRC772300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4f57c220bdc4cf6116dcd252b1d9a5f95714febfd203ac5af64f8673c462f0. 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/KRC772300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c897afeea0e3300f7408a752195488663a747fece5a600701600a1efe4029a. 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/KRC772300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f83fd1b53555cd450fe0a1b0fa9ca98ab99a4a1558dd8b63d3bbaff2c71bfac. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/KRC772400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d50ebe934991716dccdf5e1e994086301c1077b5e929e944306f5441e31ce60. 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/KRC772400331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccad0f71eaa6c4dca0d8081570a2a51198c5c0cf504b2e5f781c876049e0936. 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/KRC772400333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b2d5cd42153637482ce2a699868633649b89ca4443ceccd3808e2d700397e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KRC772400334.