1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x5e57a25100da028dccae91e6e1e8f0c335d83e71470f0a0867b20afc82c110aa. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/679cefa2-6d99-44c0-9704-2966aade4390.json and https://artists.proofprofile.net/proofs/artist/679cefa2-6d99-44c0-9704-2966aade4390.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 → block OTSBitcoinBlock must exist at that height 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 0x21635fd71066fac2bc6da5c895c8f2cafa1818b7dd9b67164a1e32379d7af219. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ772453327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8905979a443fef84513cbc8d70172ecc4e43402a2bc5d5cfa64d8ceae3b8a3b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ72525675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7621fcfd867bda0398faf5adb8df385e01c6f6a53caa5d3ff8071c3b25ef255b. 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/QZHN82505192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff402e4fb21d91de2a9c1d42c16dff2c9709014824322c05fa246edaa7ae34f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZPLS2552100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299c28c5db9594aadf55015eece48ea0474fe7369452d05b44f6062d46595ca5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAX2577654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a4e42ed2058688e992f1f2dd440d18a2775bc3c4766f0b480ffdde6cbdcd3b. 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/QZWFL2581324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4bd3eff96e07d5a611814ab6dd67b5bca0997bb752aab31da46a9a42db5546. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:31Z), 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/QT3F22581008.