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 0xfa66d76285ea866a15ad4c407ca7a0d62affd1f07949bf8b1e1c05b1fa3acec6. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b665f5d0-3d8a-4c8c-a367-0a5f107f465c.json and https://artists.proofprofile.net/proofs/artist/b665f5d0-3d8a-4c8c-a367-0a5f107f465c.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 0xd8d097bdfe98e279c738466108cdd4be4d1237a5fc6e9cef4cffbbce4dd4e5dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR2X42239715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b2fd1f3a14fbd39feaa615d1954f5cdb34ce45a001562822fceefa52f4bee4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX282167854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e38d71061dcb26d8365327e77a091cb6635234adbe8195511bdf0ce98e1abb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2184712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd102d636fc848c80e7ff029733a721f2514106d6415b45ff58b7cb579a4ebf0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2184713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d7a6d2917c4613b8fa1eda7110469bb67c16f1b0ed4b46e3c85a0b1582b842. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T22:55:12Z), 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/USCGH2184714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d87d272e5310da39dbef951241d6c5867bdcf368e8fd7d0a6f97e41ae16b6c4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGH2184715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91903d10dfb1117c5874ff535cae0b8be1ff7bd8a0caec05ffbb8feba3f5c6e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGH2184716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cb437685f6afa6a5b296c9bb526fd39764a778b573edd0f0cf707b44bb6eb3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH2184717.