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 0xf28aa6d1429aa58a5d06c7156e7e6949feaf2f3344f34d52ac7d96455d6f9201. 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/a78beee7-b040-4e3a-afd0-da51d03515b3.json and https://artists.proofprofile.net/proofs/artist/a78beee7-b040-4e3a-afd0-da51d03515b3.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 0x3cf73d0f47bc81f2fae361ffdb26d3086dafbe12787919861228a143169b2e7a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX871536873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d07f1af016322a64def5de20fc5aa1975ed7e48b23e1046a3308e37224576c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/FR2X41801057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde96ae940687c161e828d39ba4b3684214edd27fdafcb8bf4f4e1d6d388d45bf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FR59R1877655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8102a38bed0859d06a8c7d4cf1c477aad9739269e73d59c8c21e8f825fb604e4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX202242158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8744b7b51e330b08897a6e33fc16441bf47f19622ef16d00e332cca116484ab0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX872343884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a8e0bbb9b8883bdeaf293513a964423b3529ebd43f4ce9f4283516d6e7013a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX282526813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9590bb06e251f8498d00d2e87961676f1e47381faba52c164025c82ec5fb84. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:49:56Z), 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/FRX282575608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f5a6296e1af6c9640217fe5c31f82d9d712edfa44e082d2e8c17e2ad49dcd4. 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/QMKKH2201057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58493386f17ea63924f7d3f5eb38b9b01f8c428a3bc333268fd9dabbb288adc2. 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/USVPR2300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fe287de7f3f52fad394dc345f8057ded7d4b1e4935037d0ce8fd271d07104b. 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/USVPR1700047.