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 0x8fea7bda43c3e331d2a8c8516cc76417fe1212533e5cd97d13e21543f78122d1. 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/7fa94fc2-573a-4266-9111-31dfe5735a71.json and https://artists.proofprofile.net/proofs/artist/7fa94fc2-573a-4266-9111-31dfe5735a71.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 0x909034dcfc034a62884cd056a38c90a6038068c02e34a6400795b00c2398aaaa. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCADF1741100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a95bc61d8d5145156f9f6c95c3d577b8052ff8e508f6d7f5142cbe25c6e646. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:26Z), 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/TCADF1741114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fdda44f14ccc4caf7bb2dd8aa7e5c259a8e5e2e6dba466d8b864442b4d099f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:49Z), 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/TCADR1857336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40a8edf8950c480a4328208876efebfe9d27d6682b47f7166c76aceac947b2a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCADR1857337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f47e6a4c03432f0e94a16fad378b89638df134b7de8d7f531909ed08134f61e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCADR1857341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bbe6529bb656aebf1d7af6bb9bd569f6e28d1747862c215307e0f806854338. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:36Z), 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/TCADR1857351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469b01c0cece8db717f8270937efe6ee97ffad952ab88979b1346ae6cea5bb0b. 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/GB8UU2000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfe29dac09fb44d9816e348bf26da7f51ae728d3ae48d5a9f67d11641039983. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GB8UU2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36c922a742eb171dd960e9b4b2d2a365aa928fe8cc6c872220cc2e7c3975ac9. 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/GB8UU2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d322aa3a293837201a0d3c3402e439ded6ac67dfee23dd9fd39926dd82607cc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GB8UU2400115.