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 0xb35ce1dd341e524cd5bc6a55b2d6c496e5def0d6f2d817f21b6b4e6e8c7ff82b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5340a4a1-0aaa-4575-a13a-ef33ecc5d0de.json and https://artists.proofprofile.net/proofs/artist/5340a4a1-0aaa-4575-a13a-ef33ecc5d0de.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 0xbf0830430123bba389a4a21e99bb0cb7b090e25867c19f48516a11aa532d6a4d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:34Z), 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/MX2629888552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc36d7ced047130af7c1785e2c1b58dd66ad31ba684040cc87804fbd6fe600b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/MX2629888544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca291bc0ba9ce276475731d2b68421e895aad509ea7e07942b3919ae5445dad. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/MX2620279033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5089f436c13f05e743107c9990921d8a57c58e90d5cce5555fc9f67d3f441ee0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MX2620279037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed834395adac87b4c1800d2220d9bd91c2de0965e77351f3947388668aa9266. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/MX2620279046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c71d4f90d91446e99c190c72f3c1f2e23c8b091916407927b2b06a07e6333df. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIR2494575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8385a18a6002d1f31bc27d322bfdafc158f7e5e122301f67b45e46554fe8ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM7281510012.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410dd670f88bd5f211aa3a7601143057f7aeeeb4ac44d7b23e726623c41f460c. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZNFJ2303086.