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 0x6dfe82990cddc7506bed7c1f12aaa33491d69db7ac753588f2e446c29cf2e3d1. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f60cf1b-5bdf-433e-8754-153cbd6638c0.json and https://artists.proofprofile.net/proofs/artist/1f60cf1b-5bdf-433e-8754-153cbd6638c0.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 0x15999620ccf3ed92e9cb5e6e473467da28eae3e44a5fd783a8c622956b020084. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:27:09Z), 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/QZXLZ2387903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7435f7134eb92a3a76de35424d52418be09b96e582f21c5b9d7fd29954a60e80. 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/QZXLZ2387906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd540bcc6e9f56dd0d437f27144439b0f8f9c1687febdb59ff755a36240e3c7c4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZXLZ2387739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1c5bed2d8949aab158602cca0b07c9c70c855f30b58fbc3e922ef1caf609ed. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZXLZ2387902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5f8b7bb007b9e7f1f701f3d165289bd7d4d6dc2d57ff50eb7bb9210da227ca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZXLZ2387907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd53889779d4258f23187cbe3f6d4fcd69c2f54e500fba554036472752a469da. 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/QZXLZ2387905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9108e4f1a9569bf8b079301255108e2d55d185999d152a72df92d037dc38d73c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:57Z), 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/QZXLZ2387904.