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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd481ab033a6c62e090459c1e644ddea395b0769f4b5f3c58811ac29996e09a60. 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/02d684ee-b4e8-4f52-909c-deec058e1656.json and https://artists.proofprofile.net/proofs/artist/02d684ee-b4e8-4f52-909c-deec058e1656.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dac8f5c38476a9f1447f04998ed249e6f88a1b17177f56e80cebcdbc2d98fd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BEA952422801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b64ddf0984146e717e198d36612f77afa317b0c1e138a01d9128d45ac128b1d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BEA952422802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5713544880462fdd52ee95dd3b385623797e5434f6752e0b11f11c9e6652aeda. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BEA952422804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5b89dcf89093c9a53d5eff89a45d720d1f05b5c839a092dc80ccd6771ade7e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BEA952422806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98f1e5d80ff839e0da53b1b8257af16a1f0c067b59bb43780807afb7723ee0c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BEA952220501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d425251c1d1c80f17eb06d361da9457d8d6f36486fc6ee162de198ed2ba0e9. 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/BEA952220506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b424e02643bbe3ca8d753d969d8fb23f9db59585ad45ae7fa850cc243c770be. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:20Z), 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/BEA952220507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8597d11a7e23e4c3de3f83cdae851d0932d82b0a517ea679ea76530011bb9a02. 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/BEB131902101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a5eb3a83112e6bea8b300bba206ed2f158f5b359dc0ecc078f4cc96cc7b11d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BEB131902102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98f1e5d80ff839e0da53b1b8257af16a1f0c067b59bb43780807afb7723ee0c. 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/BEA952220501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e31cf6d7c476e59f7b453a99a3ef8414bd5730179e65309198a32b1390f919. 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/BEP012430001.