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 0xe0c98033bb13f89f15abd4ac903879eb82ed00bd039955b780a07905ab2fcfa2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c75f551-51f9-4b10-938d-1864bdb438ff.json and https://artists.proofprofile.net/proofs/artist/9c75f551-51f9-4b10-938d-1864bdb438ff.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 0xe2afc88c5e748d7821ffb655e3f352e38d3929fcea74aa1bdb16388bc298e678. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXH2J2558615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae463fb8a88b60c7fe510ecdb52d06b82f3d5b7953831d1905af79e106f5d51f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXH2J2558614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847ed951642d67c48d072ebdca9189db8d5c9b00ae8d5f196460176a17e39e26. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/GXHAF2512637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68ff576a5c2cbc2a4650ba1f3d1eba6cfe21ea6861c6427ab123d52f18f588. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/GXHAF2570972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cf5d91bfeb1b65f732e4f886d5fdafc77f89dfc52fc29018a6101734f852c0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GXHAF2570717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016c2c73b7d4221eaea03aec40e64d2f59501381a5634dced64c9dc2a8937ca3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GXHAF2570716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122466a992fa7b28a627533e1e080ea3be1b207c3e09ca2344b01ce8fff9567e. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GXHND2583835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b6c7484e25561ca43c60d01f2a4d4866f1b3050e071293478f08ccab30f3bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GXHND2583813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8911f3b37cd9eeabda34dad88bc7ab27b353c942621bbbd366ff53be3e9ff. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:40Z), 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/GXHND2583804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe615d6092089eb9de108cd485e2d16d648e5d67dfedd49abccc266d897b38876. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXHND2585402.