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 0xd748e4a1aebc6e3d33c5c600823db5071e0c0e4bc5ada5fbb85639f0a779d87f. 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/72dadfc9-7ba9-4968-9d80-4848ae427039.json and https://artists.proofprofile.net/proofs/artist/72dadfc9-7ba9-4968-9d80-4848ae427039.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 0x392f4ce17b27635550fd2a9e4fe946605962c79b2cbb1613e5cc26149f0265df. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:46Z), 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/FR96X2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cf65200e9892bef01fec48547820c44c898dc078c901fd852cb0a4dbcd6931. 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/DGA052305075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fa70cf37f3b0f90c67535853244c46ae33f6f10f55d17f4475729d4aa8f14f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DGA0L2385304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c47ac3d6d7797493d1289cf3b4403744b404dae10394b50dc82ac8d53da301. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/DGA0Q2413342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c287d86564af3f1896cc78bb74d12fbdac725b27a8c74606027a624da227dd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0R2462431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cf2cbb696866900b4520b8114c728fcb04d970eb8aa083040b31eb23fb4011. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/DGA0R2462457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b43d5e6a057943b92455970d5fa19ecab2aab422603ea08cfcb34715cba951. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:07Z), 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/DGA0R2462437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2daea80d83eaa324c39ed6c6544cc2781de3aad23b96611a3eee2030c6c7d58. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:15Z), 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/DGA0S2488214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed7292468d9ca2feaeb1b2dc2c31f85727bb1525bfbb6368c2ffccd5c6a93ac. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX872501353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd347d3b66a951ecb0050181f64934fa3f76e4fce856288fda9eaf70c06c911ce. 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/DGA052506651.