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 0xf41307c293602a51f3e214b86462a5fd2cbd312e67170c49bbf1b9c4eed2a8a8. 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/20948791-31e3-4163-816b-f7871e0ebeb3.json and https://artists.proofprofile.net/proofs/artist/20948791-31e3-4163-816b-f7871e0ebeb3.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 0x6e54e7e45d23dd977f20049d62fceb5929209cfa1271488e4423b4ace0ddb28b. 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/BRUM72400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f53885f39295e244d5a4b457cc6f96d360874b227fba0d2507f8ef5e1aa36de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUM72301686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5f78e863d43b49010e74bbdf99f7d86fe5a22539850d9d96f064f64c434fc2. 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/BXYCC2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f4065fb4717226b41623c68472ec87ea227ef941ae8b3135ac692d8cdac0db. 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/BRWMB2301694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e54e7e45d23dd977f20049d62fceb5929209cfa1271488e4423b4ace0ddb28b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRUM72400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03e04736e1e9374ad8261c9091a8e386eba2bac7e8795824f9ee1c603bcece5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:57Z), 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/BRUM72401605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e7bb6a89fbc99fd46963738315af6df9940f9bba5a70139ec08595fcb8a4fe. 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/BRUM72402252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5442f883426f48c010bbf675fbc9f843440209f3ebd28b42cf7aae100ef788b1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRUM72400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5f75d62eee01680a2b4c04050a21ee70046a3e89eeb7e109e94126159f459c. 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/BRUM72402253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45c39f8fdbcdaa26b8a2efb49be646c3a0d51a75a050f4807bbfd4ce2b86894. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRD1E2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f81aa2cef7aa4a715669aa297d28dc8cffe16dae6ec62ba2a93c97d50d6b124. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRUM72500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230481b959e5c2fead62fb5c6fb8a26ab438f56319c9ba1335a8cf4fdb7d7e4f. 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/US7VG2581188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34845a78036b5eb6779b82087e4d6f6d36b8da0d380e0db732c01c58965a0963. 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/BRUM72500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bdff15a9a089caad95dd2595a9d0f3a3525d79fc2112df743d78af265028ac. 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/BRUM72402959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27593f6609a3fda51b2d9fbce3f7b1d1fa5d99bda7294c56ffdbce08d6fbb489. 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/BRUM72402445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abf78f0a4f81228bb07c84165fcfd8c5c0b61cadbc11b84551d8b81d5cafa9c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRRGE2400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c1a30cd54ae1aab4dd98c428f4854f9cb809858caf67d1af91f5ecdbc01ce0. 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/BRUM72401295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5442f883426f48c010bbf675fbc9f843440209f3ebd28b42cf7aae100ef788b1. 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/BRUM72400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784368ac579a18e7a723c5e0db5ad212e661559d5155582f404a31abae549ad1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRUM72302176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c41b35c24c0c95138442d62f392a67535afb81d7a830d943336644ea3c01843. 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/BRUM72301308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99f3de7148ad90db0d9d085d7293165c7fbe5cc75e8809134c899159097c50b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRRGE2300525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e576ed5bdb1d96c4169360f7c88db9abc7fb3b9fe52a246d079a281c3bb57eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRRGE2400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63e267eea9fbd56ccb8c1167a52fc624871fbcd57a04dcf34a83bade9b1dfc7. 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/BX3292000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf5d099e74ed479509b40daca5cb9ead03935954d51674a510a0ffc58ea87d9. 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/BRUM72300767.