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 0xd61f10ca9a08d7bf1ba1d7179cd6f9fe4108cdb703724ebe7ab686fc65dabadf. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/163ecd4e-0b8c-4f45-9e1e-d6fcdb2e94b3.json and https://artists.proofprofile.net/proofs/artist/163ecd4e-0b8c-4f45-9e1e-d6fcdb2e94b3.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 0x0557cc905d4f3bbc7c255f157401588aa72d4c63f7772346548c3e64001779fa. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/UKXN22040145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6861cd3a72838291647aff82d87ef41caa881fe0092c92113dd32c4e3e4620a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GX3Q92332705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec33523d2d8f3f4df04a8738608d0ac464c38c020597f9ea19d3001b6742d74. 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/GX3Q92344867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aeead9b6bc9ea7da41d31e04b63d82347a2ccc607c96ec7d32f25719ab0da0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX3Q92344868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597953b599490430445fb27ebb2508a1038fb5834e98f5cb11a4b255a8281e54. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/UKXN22342935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39630563141802ed5e2a08a7e1438fc9e2529f8dca8e9bb535c5e85733e9b301. 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/UKXN22356311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41888d43e69b82b42d73e99eef3b3ad9b347215352589885171cb5cb464eb3d5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBMA22330096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cbd21585e17bd6c862f9d005f9616f69b8ddf32bc369e69ede30a05fc63777. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GBLFP2521549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251270d76fa91dbdfe485e1e77c1fabbad6d89a82b89adafb08580fe8a0bced8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:22:43Z), 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/GXHND2534176.