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 0xc4198f5a460ce0eff0352bfe77b182b87f13f3f08b7f27f1fac5e1bf8dd7f59c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4aeb8186-f70a-4657-816e-e8418923b64e.json and https://artists.proofprofile.net/proofs/artist/4aeb8186-f70a-4657-816e-e8418923b64e.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 0x0fd3ae4d266fea9ee95e5a02aa6131743dbc563f2abfedac13ab5bc6f87c1d90. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH6542111610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acd6cfc20341d3e14cdee47fbe6be1e40f5c7536e00d7dcd609ec173c7cde0e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6542116359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c555c7628c2b0488614a7e46ae3b060bcada56bcf007541ae51e9f678c878d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH6542116360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fd694f442618102e69e29d3bd866902f8d3f556a838c23f6fbc04c9f665f5c. 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/CH6542116361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aff664382695d3fbf5acd5163e511ed8d90b1c1ae6102db122a03a6347cb11. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CH6542117918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaaf0f70d0a7371e19dfde8da3082be1c3a485f2cbb53c4ddf6548353814b90. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:20:53Z), 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/CH6542171025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f46b356ec8e6a197c13c21e599e936fb435f589c5fd39584288e2af5da3e6f. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM22452045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f1d10cd1749b2e966f828e5b53ed0f903c5dde30cb9fe28f01a75391b3393. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/USHM22452046.