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 0xe1e25b48322dea2b1703feb9ffb0befe9e1559c23b307997aa7aa828c9cbaf72. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9cb33de-72de-4e72-9e2f-9dbe1fff9a5d.json and https://artists.proofprofile.net/proofs/artist/a9cb33de-72de-4e72-9e2f-9dbe1fff9a5d.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 0x7ff631681749e763418031d65c6b89d199268b7fc412e51006b3154326ee17ac. 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/RUA1D1928966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e0e5d2ed8ce6909dff8f3369d62111ebdade0e0e7bb3b32fe205093df6cce3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:04:50Z), 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/RUA1D1928965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07c1c0204f19a83e706db1f81e49966f72a499bde3a3c58a2814d26daa496bd. 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/DGA072128160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f9427f48f397f179bd0ccd76eacce5ef42b22a7423bac6d5a5c248e62dd6bb. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/FRX282143732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e8af2c7c14305eb8d94709a5e2f8ef1d86b0f8ac9b04d42fa984d298c656fc. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FRX282153065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b032f8039a0477ccb0393e4d33ce7197b6b23152a83fb60d4c1046959d5226. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:29Z), 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/DGA072456517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e16676e336b25793188c117db17eda29d10a05827b9481ccfe60d50b1ced2f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DGA072456521.