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 0x9cccd57450b894ed341c613432c3ce2354dcb23c95489646fdab40f139323301. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22637a86-5768-4414-b0c3-72a2c8ce8c34.json and https://artists.proofprofile.net/proofs/artist/22637a86-5768-4414-b0c3-72a2c8ce8c34.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 0x5ac0e3297aec4870d54be6c0b5b57297dda38bd5cfc4b13ab1516cbc6cf74c60. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZAKB2121613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dee8237a14f9ecfdf1eb29871cd97eb01a02c10e5d9721462a293f8f0c0638c. 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/QZAKB2165473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517aa163aca72dc9e6da0ecd42e1e6674cd4790b03c3f7125cf6c7f61a741d71. 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/QZAKB2167486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1ad95147b3078ed0d3ea27e548339e16302141309bc57154bfa436a33b2b01. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZAKB2168221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298e7ef846bfc84c6d90d337cc4dee964edcf6f1204cdf77abc74df428e0728. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZAKB2172640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ac5a95dead38bdf857d379210f3808668d2d6eb4d5595c55ba7ab6cc8af020. 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/QZAKB2172641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552ac04a3e11ff751145c8b5c46825641dace744309b0e39c6114b6f68d80d4a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZAKB2202083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c77cd2598ac413a7e0d079c2343fda9b6a93b6f2ad8c9928b8564a84ccc912. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:17:02Z), 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/QZAKB2315293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf834c9a5a4259c2f5814bfe90c7d3a886afc112b881873fe60c6688856990a0f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZAKB2345042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74ad152b49789cd7c70c0b87e1a0f574f3eab1924f8d77c04dd013ed95febdb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZAKB2374344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c725821aa0ab7f2537fd409c113e8122eb814d9eed587cc82a01f9bc61a95d6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZAKB2419284.