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 0x9ecf9cdc7d22d2cd10210a1f175c4624e4ef08c765229147091148470c36c375. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a80e1d89-d00d-416a-a673-4e588b2e546e.json and https://artists.proofprofile.net/proofs/artist/a80e1d89-d00d-416a-a673-4e588b2e546e.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 0x181930defd11298303cff328ef70009c73ab0f99778991cef92b99a97ac4b4ef. 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/NLCK42222011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4194a05194777ef04a9c4365d49c10940512426cc9423f642dc4ae61b9d9fc7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLCK42212306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4194a05194777ef04a9c4365d49c10940512426cc9423f642dc4ae61b9d9fc7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLCK42212306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e1cb955c1757a846ce88587bb633dfa17af08cbe8fdcc7ee498fd7c77ab4e6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR0007737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4535a5dbd9d8da67cfcd93a481703215eb58001f1252d15f078d2efd1b12f376. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL3M12412467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4a56984db8144bbe0de5f7c82437dc3a4b0af3b5ccc44c6d946bdec1c82077. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLCK42506643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f876880aa9643663887de8a0a93970c533388c4d3d722d815d4480f8f2b45f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLCK42504750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5696ec5bec76ed5f3fdf8a221dee81e20453f013d524bcf9bfc89a08e25cd2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLRD52355219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7007f9defeae1029bd8f77ba9fdf507f09d34eed47bcc84df45a3f15766876a. 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/NLRD52355247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb810d0f5e9239a2ff93d4faa0140ca1392d7b0ff7e28a086334524568c904. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52413789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2c53148679b3ee77879b97acdd224356884affaaaecb8eeb92fa810c24cd31. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52413800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b266423135de97107c58a79026d0cb604343d181195b5b14d78a95462e7d397. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:37Z), 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/NLRD52413782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5886a49e8bd832760326db7427f531bde157677e00959390a03f70626f43c7fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2189140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181930defd11298303cff328ef70009c73ab0f99778991cef92b99a97ac4b4ef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42222011.