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 0x90c6125117b2dc0a608d5aae711c894eb2137533373a2c9efe4c85bdb28a1ac0. 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/16239c4a-56b9-4820-b39d-f8ca62da6b3a.json and https://artists.proofprofile.net/proofs/artist/16239c4a-56b9-4820-b39d-f8ca62da6b3a.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 0x3ddd3bdf2db8536ab3bb2f40c4e3dfc90ebd238976670c5e9fdd4c6ab8cb9293. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6DC1737216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad88167e15fbd83e6878a2ea21c47531de3085f77bcc8c557e5d00155d44c0c9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:26:15Z), 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/QM6DC1737218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85090bfa43d529f4d2ec2b622d740ffbc881c1e1a98aa7ec927f65e13f49239e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6DC1737221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7552330410aba39880e4933377c5a13a25dae498809856b6a46bc1b935e2b477. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:37:55Z), 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/QM6DC1737222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f70dc30a7017667158f943a3fa6819701a08411a52c1554d3590651231b0492. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6DC1737224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6af7e73501c59b471c2a1c06a973070884a470fe5477fbe8fd8dce1d581040. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QM6DC1737225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73983b1e1d2905c64f2aa85354a8394229f78b238e61f3598e2b01234247099b. 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/QM6DC1737226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14543d1a94f11f902be4010eb0e22aa4ceae20e6ef3c87df0c8aed04e8c9679. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:10:19Z), 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/USZBG1113324.