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 0x9c6e53b3f9f3c6ed21dbd5461bf242ac0e6103e6a0bf9aa3a35a058207c79674. 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/99d34ab4-9e42-4c6a-8f8b-404bcb1427fa.json and https://artists.proofprofile.net/proofs/artist/99d34ab4-9e42-4c6a-8f8b-404bcb1427fa.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 0x0b65ea5bf9a09892664007f488e9df0f70cfb319917fc684fd485050f5da57ba. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CA5KR1968888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19879b1382032e28039b149ac132a2f906e1aa0948ae7a330c7142ec85f417a5. 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/CA5KR1968889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93ade8fe1ff15f534b3481909f9017fd1924ba3efeebbaf1f216672b333d95c. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/CA5KR1968890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2adcaaf54546e4dbdc56f39c87f2a2646cf18016720895ac19efc5bf8997e46. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CA5KR1968891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c3c3d73c833b36eedb4f51a1056abfaf8048a2ee6c1ae0e8dc97c0d87c6d3b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CA5KR1968892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944c11377c9b674837649fca4dcf4ce5c007893939f8cd2a2159c9866213604d. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/CA5KR1968893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc3bec370db34da364731addb12b03e6d72c11e00834f70edbc7e0e1090edc2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CA5KR1968894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8516048c9999c5967867c0db575d3e18f08c0740263c9bc220f4bc2f29b762. 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/CA5KR1968895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c90011c16f341cc0a3e4f1f32c80d529ca69b06915d664d7997412526f0aeb3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR1968897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6526a3f3f2558532b031509cc523aa11f790df77407702759de587c2d79206a4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/CA5KR1968852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6882a9f8d60504a3d378f9fc88e1e6fa8c7c4ac1ae89d3164be2bcf1e979d72c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CA5KR1968855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54a51c13a239e6f5c67fb1f460d423d633e82bb979eae27a93b7e9627813a8b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CA5KR1968866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717332b14fae05cf9c33f55ab8f5c048b4af2e4425e11f9d8aa76e93b02f7ca8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CA5KR1968871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134e3121e1aa73055e68698417cd6949df5df7261a843fe871c640783c814e2a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/CA5KR1968872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa2c99fb02e67f5cf51f6480c9ff8f41dca888f7f3b15918641ca36f555b46f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/CA5KR1968874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc278634543dccd75e70dbfb5c1d6427b74a00b75227974095a31899aab06313. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/CA5KR1968878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe5db2854fac104b8f8e3938ba1cb19d4203015d0ddff74a8433aacd63ec209. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/CA5KR1968880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5001f06d91dfadfb06fe65ec248ac17dfcae8505b54e6ee703a96057a4729e59. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CA5KR1968881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d65d1ed6cd43af42f240fb9d5752f5077ea0f4b2173c003b0ea845ff7583207. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CA5KR1968883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6460db653b01f1cc3e7c21218e55d0cc9c27799bf0f33afc871998aae20167b4. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/CA5KR1968884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119193c9ea9acf6ef78b57268355902d6bf288b86a07ed48fb8e2cc64c3113ca. 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/CA5KR1968885.