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 0x019d8d1994c24fb5c8235213e8e7b49a95d898c55af1f915511a811036d5c381. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6719ffed-3e4f-4350-8c1a-b65a27cf262e.json and https://artists.proofprofile.net/proofs/artist/6719ffed-3e4f-4350-8c1a-b65a27cf262e.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 0xa0373a1975ef5bedd2f24113e5d111219d1edfdc85c2cbf18467353bbb9b46f1. 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/QZNJV2377423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa345dacf063d36670879d6198b2cddd285163f145fb527ac877953a8c696f45. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ESA112446552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99a4c4e9503abdab8d9cf4a620fbb6fae225a5cb5da8fd8e7edf2d419dd982b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ESA112446501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6201760c1f66f908cc5d115db0bf9fd94a4a2b3f6bfa4769c1c9666127512a3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA112446505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e6d0ef841e4c075a38763d2be4327260a0531c102147ccf4cb37e53644cf59. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA112446506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358dbb0676abad2216d1f5089ec79024d7536d6cfb8cbf7705dd017e4cafa7f2. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/ESA112446470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f47d23f4135d46ec6116371c79500de1dd79fd5b1bbb9b079c5b70f7c13b7e2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:44Z), 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/ESA112446471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e412a211b780183d45e9b44950f9c47b35a88ae5d0aaef0cf77040c67483a7e. 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/ESA112446472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5812ec08c4dfdffd11dc017bcc8d747af4efe9c20e9d76990229a033cde1f8. 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/ESA112446475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762cbf9f30f6732d1e73716e6ee6d8979d6accc53c9d6d7f6f26c27ea9a8c67b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:50:03Z), 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/ESA112454448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e4d1e4e68bf8e471e0dc16969397f909068e38729b6677ad46db9304f4222e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ESA112454450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600d4ca65d66119475f246e698ac37d253f7fe6e1c7c83c7f7da44035d3a961d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:53:00Z), 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/ESA112454451.