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 0xeff730997ead42103e57874b8ba70275502359bba08577d2db4e70174fe2f7b0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29a4e8f8-2f8d-4727-8063-2fc18422184f.json and https://artists.proofprofile.net/proofs/artist/29a4e8f8-2f8d-4727-8063-2fc18422184f.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 0x521e59c9ac9fad3c4603e2dad52fc3be084b21ef0ca390c67e7c45e6a26d058c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:06:57Z), 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/TCACF1569814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69075d330b664c9e7e454b747a5cfcf16cd26a4d01657e32f5260d4f70d6e419. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCADO1880444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbabff4b6c752b5809976d44749b3e7e6f98b6a385177571a0105dfc60a78293. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:39:42Z), 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/TCADO1880437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4e3833ccb4c626a7444b68b9f65989c459096093c7165de14d974e6b47edee. 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/QZK6N1962468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4e3833ccb4c626a7444b68b9f65989c459096093c7165de14d974e6b47edee. 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/QZK6N1962468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8283fc5fe7a24292ae030b01bf4a05d273fb245392840d07f149e7684ad2a2a4. 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/TCAEI1901759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796e3690845024cc06fcd95c9b36ddd0e246dedff3c35192086f8d08d1da9d7b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAF5R1800131.