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 0x41e27ff752a192093d5a7750fb91f31552a2476b068894dbb345bc3b8cf043bd. 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/af5bb4ee-d323-4a3f-8b2c-29d0bd8e8759.json and https://artists.proofprofile.net/proofs/artist/af5bb4ee-d323-4a3f-8b2c-29d0bd8e8759.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 0xd522354c07d2c53eb02dd50036067ea25763f98dd5440ad90e1ddb614d38023b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR59R2493037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8c2b05060764b96143c1970ea2d50edef23855b61d1c457db69ad009b95120. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732356646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09141c25b095473e30e519b8d5c65ac9e9b2be9011d1a8ce3977a6e7ebd4ff5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA082296326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc065ebe2e1a69b2583ffcb3683438941409b22e28705004bffcef45dc8acc60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732305167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd75bb137b017bb98909be0f8c59c104458ed0004bf13bf82afa7db61e1c825. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX872233888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07797b2895a45cb6145b2ac3e26a134d0169e5fc83b99c5eef169d99335456c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732264959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d07054417dabcdba5c23c2fa550ff74835c5e0b6d8fd8bfa1b2f93c847c820a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42229329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123179eb5f64220088073b0a1ac6c9149244d7933c575d93fe574230f042122d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S2231019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45146474f6ffca137f68ca54aa8d57621b6a81f9d296bbbe9aa1f97aec00ef2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732154514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56731211807bb94565bcfcacbc0256c02aad8337b1fca480589dfce63872fb8. 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/FR96X2286898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4b55d491fcbd00d8131ba2b664f00b78d83b45cd89edc479b9b0a05bfacc7d. 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/FR96X2286899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc54f289355637cebac90e8b9d643fa9a5e103253f3325a9549595b111358d7c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR96X2286900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690ef1579af4a475c397dacd1b949514632a6070b43ebc908a0aed32d8fc190a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2286901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4653c017197930299b7b5f0cd3621440e0cdb2f252aed495aac09acbe997db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR96X2286902.