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 0xda689619d303413643585f1a9826ee1db96220b51be176cff6b3be1c8f93e0af. 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/da48a33e-f579-4607-891c-279e7910dcf5.json and https://artists.proofprofile.net/proofs/artist/da48a33e-f579-4607-891c-279e7910dcf5.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 0x9416254310d0fcd23ebc52d4fbc57d92cec81cc95c4cc2217bc919d012098199. 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/BCD592200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe35db9396999cbd414f0a63665f1837898f2f5822a4c62c923bfa2307d567e. 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/BX3OL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fe7428df0650994e9877262a33e2d45fba6e30c441c9ba5023a651a81000c3. 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/BCD592100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c228a5ab3768e59c20c78874b40c91955e70fda6e3701bbfb0c1c9d8926a785. 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/BCD592100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89266e12010035d40e2e38bcbc6a24bbb2053e3ccb6fb6970c5a54077ebfa6f2. 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/BCD592100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b09233bd2f5bc3159a0e95d1f2e05276848134cf99474101d818f19456910e. 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/BCD592100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552c9a8605d9d3d65e9582c34eef2cfc7de4d76cfbfe010c84c3931b886b6366. 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/BCD592100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9416254310d0fcd23ebc52d4fbc57d92cec81cc95c4cc2217bc919d012098199. 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/BCD592200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8c9a6cd720cbfaae75f19e415957c46e549979491b8b1de0d9932789010527. 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/BCD592200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cb1a0f5b82a58d3ab5dca4e21bd3cbb45f12b3120b9e24c69f3d4adef14936. 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/BCD592200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd234cacaf65be0df18ae3067c3bcc3884fd5cdb8ce3662bde927a90ace2b6842. 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/BCD592300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4524b3c5bb18622f069312788cf83675e6b846d7f7c788465abc55b9c9763966. 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/BCD592300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b400ff773344269123b32b70b79fa9d399149abe3ab5f35e1fd32f23e134e5. 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/BCD592300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6be6ad994145299b493616f766db1d43ed6d420d1828eb3676daebddf022d. 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/BCD592300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b400ff773344269123b32b70b79fa9d399149abe3ab5f35e1fd32f23e134e5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BCD592300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8c9a6cd720cbfaae75f19e415957c46e549979491b8b1de0d9932789010527. 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/BCD592200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cb1a0f5b82a58d3ab5dca4e21bd3cbb45f12b3120b9e24c69f3d4adef14936. 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/BCD592200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b946d5be352e51b3a67b92fac6340b403b0bb7993c07e65e39f8f676e7b847. 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/BCD592400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f23c637c0f95f15c0b465c8c0c88b6572d0dfb54afe822a400fafe68ea53a23. 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/BRQ4H1800009.