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 0x0bd58c2b19437633a9af04b08942ff0dbcdc9978b02263e3202183240732f982. 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/a850a067-4008-4553-bcc6-241d2a3fdba6.json and https://artists.proofprofile.net/proofs/artist/a850a067-4008-4553-bcc6-241d2a3fdba6.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 0x6620d5be456fe7d70b5175b7466efdcdc908bc4e4075b5a947208b78758f3cab. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ8LD1789270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93663fa623de1cad42a795f066c3898d3dd11b2c7765334b62df31efd3215338. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:22:14Z), 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/QZ8LD1789273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bcfc783202e777c0e0d04914ea465e93218d178d674d793046368b6d62a533. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:00:53Z), 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/QZ9JZ1737373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8a0b925102cad0abb0aa87116a96a7458b735cf53e75a27a6750ab196ee58c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ9Y21740993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567ed89f710731ebdbd2ea980e7a8bf52df9953c7790e87ee79f1936bc1ef72e. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZANL1780134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fea1b2d421a87b6d765b6e4c7e7d9285ea17c363a32db4b8227bc82821134f0. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/US83Z1832780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2386511fb0bdb3715bcf6d5bd078ad858f486067e533a3a812c206123ebeadd2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ8LD1716421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26926286cbdac584c7f5ad1abe785c8cd30494526b6fa321d0f95d4a00a401b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CA5KR2078193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf311178422c33decaa643e3fddb82f9d179c5cd5c668e7680595e3f6a8efae9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CA5KR2078192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4e932d3b38a977bde761a124279e67440eb2db9130e0414a7b97bd15ca9185. 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/CA5KR2110207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf327941a7fc1fc7cceea5e30bb5741d5dc764f6187396c4616f21fef0c00760c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:38:08Z), 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/CA5KR2168429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98d0f2ced8f9692eb64a73e6415905ec1e3db3bb5fd8ced145bd2c6f4d8c969. 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/CA5KR0041120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd819ddd64d5fc3d52b61d1302527db19b0b45378545b30bc9ab82d90037be56d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7V2583663.