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 0x6a9d782bc74605a4f5f9f327216ab45bf60a20d3d2fff5c6f2deda14be02b379. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba3620f9-6c48-49d0-b110-169e8c58dff7.json and https://artists.proofprofile.net/proofs/artist/ba3620f9-6c48-49d0-b110-169e8c58dff7.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 0x3969545fbaea15928bc17f84ad3f2fe2b9cf574059667dacb0f84f8cc9b5e83f. 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/QZDA52459975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61878bfabdd1b5459362e8c6270b122b78f0a768ddf24bc7f183f9f998934b9c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA52459976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad7ef83b3e34c8ad085176377f7a630d3d4e5a10c4d4dda97757259d1124fa. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:32:44Z), 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/QZDA52459978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c41000307cfa909f67f7121d0f33478aef59f7bd424ea528bfa738a3d19f9. 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/QZDA52459979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e8addf1a443b9625534a87eae8bbc1526d0f776ca2973c1014e4727198861c. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:29:49Z), 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/QZDA52459980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256ad92e6f55578194a92a912449528073184cc4d8fe0fff497040a8667afbd2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA52459981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8098a3996f176c5098733caa2dc0e5f3bded51623c2bbc10c3c37e6fe89a40a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:39:05Z), 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/QZDA42492876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f59abda1b7e65cd626a0389e70a8b2bfd780b8237b5724a191abddd77f4ae1. 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/QZDA42492884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557e64da8046a3a0f38c1830d9b1177cf666fab32e4566090101a25c8bc2f9a9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA42483282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4c2974c099ac6f45000ff3495c7f8427427855b1705f39b1d1b070cf68666. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:38:04Z), 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/QZDA42483300.