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 0x049549b8f58bf57844a81821c32b0c84fe7bcea7b36c6a5884f09dd6b20980e5. 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/9fbbdc52-41f3-4b1c-a598-220718dd5034.json and https://artists.proofprofile.net/proofs/artist/9fbbdc52-41f3-4b1c-a598-220718dd5034.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 0x0c4e1a1569cccc087cb0f7357b5930d932c631fa15126c3c05bd6fedc70ad762. 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/GB45A1901630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde8f0439cb902ec6f619eddb056acbaa6bb57d5332b667ccf52ecc42228d0f3. 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/GB45A2002032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e1a1569cccc087cb0f7357b5930d932c631fa15126c3c05bd6fedc70ad762. 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/GB45A1901630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb457d15082c71439837de4a5956af63de9224fb546368746bb4ae4706f85c80a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB45A1901636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdf91e1e64e418417cc142351b1bc636335c6e9bbe8c60a79741367626a8c92. 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/GB45A1901635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a51d303a1a6faf15bb5a0ea937e1016b7d1c9cd2f91f03539ae92720547a824. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GB45A1901634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0287f953d24a719138f3e3ac6db1fdf56361ffe7e18291aee02a96733245a7. 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/FR2X41879589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85619d1b8969e8bbc8d26cce289b915fca51e86775d7608d13c8a2ebc34cbdc6. 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/GB45A1901417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09abc0f6c3017e49a7d5d3dfecb022f77863dde50770d74bd229e4b0240423df. 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/GB45A1801367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315be6d8ccaaaf6d57da862a470e4eb397f0900d5b18b1c19fb321bd8340b295. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR10S1865563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870ab9ca54989168448dd0bf2a8c9c4e0f0e2848a78a56a3628d7c271fb35bb. 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/GB45A1801221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34150e7f5d2751f25b99818ed5a5b5fcb4c71e04aa67a3d517d81cb959a9214. 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/GB45A1801275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa758acf726c4d836206479fecaaa12b0b608aba47ab254b9235acb384fe61f5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT21811628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870ab9ca54989168448dd0bf2a8c9c4e0f0e2848a78a56a3628d7c271fb35bb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:33:25Z), 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/GB45A1801221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0287f953d24a719138f3e3ac6db1fdf56361ffe7e18291aee02a96733245a7. 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/FR2X41879589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315be6d8ccaaaf6d57da862a470e4eb397f0900d5b18b1c19fb321bd8340b295. 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/FR10S1865563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66bec10f59ff1cff0f64ff93412b688ddb3352eb2fbe703815cc73ce410be63. 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/FRX281742457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66bec10f59ff1cff0f64ff93412b688ddb3352eb2fbe703815cc73ce410be63. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FRX281742457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315be6d8ccaaaf6d57da862a470e4eb397f0900d5b18b1c19fb321bd8340b295. 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/FR10S1865563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870ab9ca54989168448dd0bf2a8c9c4e0f0e2848a78a56a3628d7c271fb35bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB45A1801221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34150e7f5d2751f25b99818ed5a5b5fcb4c71e04aa67a3d517d81cb959a9214. 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/GB45A1801275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395ca09be3f402a50b93ee5343c1a358909e31bb4ab01361c4c4bca71eb9221a. 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/USUM71821787.