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 0x63238de3e93d274054442ec33c9a070a5de52aac5cc0d678399372add31628af. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16405ca9-6672-41e4-90e9-3b9b88f19f00.json and https://artists.proofprofile.net/proofs/artist/16405ca9-6672-41e4-90e9-3b9b88f19f00.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 0x31ff09c79bdf50468414e4c43e0af7ff57c4d31c638d28308f3acbc3ebcfec63. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLHR52132697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dcd092906a61843cbe0ee6978b94a1c771e37c2e8bb7233fe1307811c9b9b9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLHR52131957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd084d993ee63994d7cb7f782823e2d81a4931f979d4b61d1e06a85a35fbcdfbd. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/NLHR52131958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a9e31577d4ec56507e90aecc5bf910669de738d505808be15a693a8a72ccfe. 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/NLHR52131960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fdbb29288d1ed8742106a1dd6762f74438adb45a2f4812b8a34f9a3170b17c. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:10:07Z), 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/NLHR52131962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1395f2784c28d1ee57d3e1b4d2a60eb20005b5bcab9f493d2c9b66947b48f28d. 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/NLHR52131965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a0138c0e8d2fabf8cffb93ea970eb52bee5e52fabe3296380399880a8139e0. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/NLHR52131966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0e3d0b7addcb3a0412e451ffa847b667245ab07fc8a429a8d0d6dee4344a5e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLHR52131967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9dcd842ab49e93d8863959424f28bee4d7e6f3915fb8842c79234dbdd37414. 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/NLHR52131968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacb6a875e0613b6e1b06110625e80c1f063f9c252a3363856f89b353f7efb5b. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/NLHR52131971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03c153678167c692e8a7c8652e0adca1289a5ff0ef27aa2b08b402da91f242. 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/NLHR52132631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffff8ecfccd1efa1ffbd211a74e62aab90edbb24f4ee3882eb939974d612162. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:36Z), 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/NLHR52132634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8ddbcba9c0fea43a29250fc666d01c90941260ad89375733809f9c5d389af4. 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/NLHR52132664.