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 0x36c48dd940de5c68bbe8769ad4ec03fcaf9f9fec9dde60db4002e59424122725. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec7761e6-ac89-4658-aef7-4d52a4448196.json and https://artists.proofprofile.net/proofs/artist/ec7761e6-ac89-4658-aef7-4d52a4448196.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 0x9d30cd89204efd537c6b81e576d563a8369201b0349791d9258e825eff8f0f61. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXHG92545140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84c7114f1b0e3eb99966becb575dfbcdd4cbfb8e8e2cdc3463ab823b1d5ae0d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXHG92543680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b0a92361cbd7177e2bdd026e7e5311ec7885af32c7ff343b2f1813cad45bf5. 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/GXHG92545302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ba88f1e4051bf25d4d1bc016144762a87487ec6faef738f10fbf6e83d1a21d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GXHG92544435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1866570978eb31358c456d3e433dc7b6ef8f9d1457d19c1bd2c4a5ca4f8af8a6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXHG92544529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542ffa6b89c44c21825b5b34a90f89c193f5b28aca013ea77058e921ca6fb7df. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T07:59:37Z), 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/GXHG92544115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741b2569672b098e8337e162698ee4a1295bfbee2a242cab6738f436257d089b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:33Z), 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/GXHG92562154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef8e5eab6c918964ebfd3a02bbe86304a10376110504dc3febca44cb5f91d70. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:10Z), 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/GXHG92562163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b70d201005284de16e97939a73c9c75502cab6c06362c510d6345cf73fcf6f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXHG92562192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148818fa74f7ed93a2f9456fcbfb7dd8956a516abd863ab553ebb7730c3837ec. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXHG92562164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193edc745105913dae0ab0dcfb28b60f73f468e3fb0322d305fb712bbffe6133. 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/GXHG92587031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa796629ef864c6150a1bfe34589f4a2ea7010870c476630d459c15fb11c544. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GXHG92587179.