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 0x5fd995a3901687ae25f2e70d9107f60088c043fbd7b4615d5a2c7e90b5495566. 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/50ba2a90-9dc0-41f6-8a66-9ec39875a24d.json and https://artists.proofprofile.net/proofs/artist/50ba2a90-9dc0-41f6-8a66-9ec39875a24d.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 0x41c3e82ba0563ce58cf7944ea12a72eb2116d8ca22b4e67789ebd2fc8f8de632. 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/QZNJZ2391117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49144e5e9cd0642d28935362b0a12f51613a7f7776f6911acf94962a1f2eb824. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2246617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e68b21260f7bf2511610b9be6c92092966c613a0b9535279aecbeabdaf3f086. 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/QM4TW2273863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8828e6ae6d3043eaa2701484a9483ed6fbd33613f37680a407c4977a233c5c9e. 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/ES71G2048431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bbd7f8098e4d37fdb962db6cbf4d9e017b4b0218dc60ae28b91ce7ebdfff80. 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/ES71G2040809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e589646e4c3b0157d9b9666ae5f882e6b8807e3d93f59bbb7e7ff73de66479. 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/QZHN82011128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5b979d1eba932b02b842335ff04daf8cae195d12ba0113344d4a560fdfe878. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES8481901351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131f071f4670b8ae014f69334ef60f349952955533af31550b6ddf83d4884623. 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/QM4TW1923955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891f3954eea0c6a958f783393e71afdc26161651536ee28de106bb000ab46ea9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES8481801292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5549b19e139a7490b982ecddb055c4b4f594b50dc63718d4f6e434d9473035f9. 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/QM7281911901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d161c533c30165f7fbf964988b34723c419e09191418fbf62bd926eb002ed8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES8481901397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cba04c999b0c50b4d8991f4e6b7bec4afd543a4c74bfa2a3ecd07a3a1d0cb5. 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/QM7281873826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187b3c5d896f7591a438b1cf0e8cfac5def9c5f33789cd3446f710f71e293cf4. 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/QM6P41962217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4b882945aee85190b9c0eacbf4f787be3f11eae42bb6e67a76f7f36c2cf9b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N21996244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ed85feed7b1a64d65d37d0e6eabbed63296ef0b582b9c803bf0383796488a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P41945739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eceaa6d367c9380e9dd04a75344c193c5135c0247501a662e39a1444b61b92d. 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/QMFME1942199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b99fc04e2fb61c4437e18b94f4e625307a69bd388ada3a503ad57b212eaa89. 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/QMFME1968992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94c272f8853ae95af6f76fb0d4c549b2ab45a8355f05ee62d784d5809ce13c6. 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/QMBZ91969195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14987cd2ae3c670b5d4fe1f4d02f1971c85ce1ddafbbe0fedf0fa03f5a03d2c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2307357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda1cd77306f4b8623b4b856d52cf701aa5097f7ceaea1ca0a4857cc2d4f88d8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK4DA2307358.