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 0x903a8e8b351f3c1b6d82ffadaa17237e24811a6c0e93bdcb0878081afba7ca69. 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/f8ecd8f8-000f-46f5-8fd6-47659996cb1f.json and https://artists.proofprofile.net/proofs/artist/f8ecd8f8-000f-46f5-8fd6-47659996cb1f.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 0x5ab3f0a92ed12ec03ba163ced0b1d12d2abf88e53006852eac8a5f70629d798c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/AR8E41700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d31eedab3f65d97ee741d02619efcc691d0bc5123e57c4f7cd6ee3366c8803. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/AR8E41700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ba13321b7376ae9c423fa0dabc218e2a14150471d0f0d3a1562d5195e89a95. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:03:18Z), 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/AR8E41700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfffaa9402901107d1f9e175348b6cfb6c258c0cf1bcac876dfd931a726e2f1c. 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/AR8E41700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f7502b95cfb223fc28a3261771deb2a40310c9749495b5c9320de713fecf04. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:56:19Z), 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/USL4Q2023758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bd3090a829f540b8f7512137d02e0b7fad9ff889b65538dbf712d5b8e8be6c. 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/USHM82141326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733d962360010a126007fb9ef591fcf57ee8d937d1e59dafd144d1aa4ac5d642. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AR8E42100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d3dbb7b6e5149517e34d1788b271d1b5c34f46b3d948c15f43532b9071aa5f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AR8E42100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe362d35dcb24a382861de0064d3e705efdc98736f39d913554e734ad10f9ddcd. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USHM22493717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3e622db9042cca161cbd769147a8ad27d3e41e20120061118beafa878054cb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM92412236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ca342d9b76aa96fe6fed8b1a8279953dd467d4c09ff77a8c980767ca9a60f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADZ1851497.