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 0xad97a25b142795e9ca1e19d466c2c1e0fc43b5cdc7e70c03b7c44f0daa9dbbd5. Chain 2 (Bitcoin): anchored in block 953922 (2026-06-16T09:36:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b48e3cb-007c-404a-97a5-10f2980cffd8.json and https://artists.proofprofile.net/proofs/artist/1b48e3cb-007c-404a-97a5-10f2980cffd8.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 0xb989075732469545419dd14b95d96c5e522bf7bde832e29df0820e9a8219efec. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRVR10600752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe488c669ba8fb9397c699d3841ec8991197ec0a945c79b95cf1d76d9c42ca7e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR10600934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3eeb656444457db3f4967462484f8d06a3c4036642e5394df8e6828bc9483b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BRVR10600750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2ad9e68531c59076ed9f07445ebe50b22a20e3153f02ad34c75d7ce329a1ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW1835644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c79ee6815cd9c2a3ff669db43063561988dc7bf320f6f5639aee384beeb212. 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/QM4TW1835645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4561cd0cb29fac11fb1c5cc75c1773abe4fc32ff479a9db711cd74a0c5b27d21. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW1835646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175c32c3af2111f63fee9f6f984089cc458831bec47709d35d0f275150865854. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QM4TW1835647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364191d53cf3b049dc79f0eac7922e56e929f113cb1ef9ae81ff5bd9af436a51. 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/QM4TW1835648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f94f016b27c6b8a6aa0df3c71e0520934c68f4a06b0cf64c734600f68f46686. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QM4TW1835649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c13544fdbf5cc684bf8d56630525341965012b1ce620f9ab389ec246b91e7a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TW1835650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d173e4850c52a2e5e3e513d3dbde1bd6a23d37223cbf26091aba55d4a94d3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QM4TW1835651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f2f9c71ae512448b488e554540ac4ec16e681ba000a3b348cd3462386d747c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW1835652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599bec1ffadcf5200c492ac37e37e856f02166f2dd40aa4adaa32b96cf854d69. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4TW1835653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa022d9524766d68c4f8c82c27231dad935e806a63fac63322cdf1bd1ef79a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW1835654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090da8e715423602010ae004039ebec30cd8caa8d7cf8c25312cfa35ef79bc36. 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/QM4TW1835656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabb511eca9726584e535fe8609d861dcacd69a5bba8b30baa48a9b94d8ec3fe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4TW1835657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ced0871a6ee686468224300a3e7d9a080443ca4515c637e273214fac9b03f1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW1835658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253f94297d619ee0a9ac605fd0b31ab847ead20eb5f17b24db227d47858fddb7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRVR10600743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaca97cc38ef529061f636537146dabd4d3119fe466bc3bcf3ef5b6a6067f9b8. 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/BRVR10600747.