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 0x3e3f923986ace6bd6de02ea4b3fd0ab2f5692449f6fd7b7bd6686c84a71acda2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a41a787-cea2-4f73-8bb8-345910cc18e3.json and https://artists.proofprofile.net/proofs/artist/7a41a787-cea2-4f73-8bb8-345910cc18e3.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 0xb30899a11d08bd7ba0345c0cb154f73872909b1d4a3fb1398bf5bc17ece3e327. 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/GX4R52221675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d36fdff0d3985075263605d563b000bfcbc4f93e1b67a20aa54658549d1a27. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX4R52221676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833ae533ecf5184d9f4199d511507aee570b0f6c3839da172d2f4d48228fb68d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX4R52221690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cdaeb0667200741bffabbdd2ccdf3e9f697c11ccb073602b0df75f2be8f066. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX4R52221698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c39bb97a4bbd80299c8728cbe8b2238a6386c06bbc12db6fc1294bd8e982d0a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:30Z), 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/GX8LD2307769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02bdf92b9d9390a8e6f95b276b12f1c2ebff4f465f006a8307198509b0b818c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:35Z), 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/GX38U2383300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dc273cfce92906f4859352d052581913d8e15febd014965ca636356a195a75. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX3HH2320262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef14feb045c8a407a2409e8f26cb64e675a65b4fedc70e550960f180a0323362. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX5MX2336234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2048cc88229ade8b2f7c9ccb2d29fc20f3919a41f66edc5880b1a89f161cfae5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXBDS2582456.