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 0xd341f6f89f6e3562c52677237a991906dcb48bf986f7979677ed1bdb97818a44. 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/50263883-f895-40e3-a83b-00c397e453a2.json and https://artists.proofprofile.net/proofs/artist/50263883-f895-40e3-a83b-00c397e453a2.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 0x222c2aea11ecfa938beb2eda0c59301f862b2c6bcccfbb4e0ab376695842600e. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:20:23Z), 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/NLRD52022825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ebbd7f872bab929b82a86847e5a106b209de2749f04cbd9841459cba56dcdb. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/NLRD51962348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01edf4977ab52964a34e9f436a41ab7ca8192effdb231daa40de69c3e75444f. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/NLRD52022931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb697929330abd56ecfe288931c3115b522285953ad9fb01aed247303cd5d94f3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLRD52022932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55be3f121b9b2c6b707a2068503d93bfe4b06dab25037bfc7836a343ad058579. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLRD52022934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eb96f5ad0de753fad1eef10ee8f3be75f829ef71674ab519a63c9e0cbd0bcb. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/NLRD52022845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989e0bceb4d592cec0d880309ff73be59b62a0f9402cc31f44d3e397d8f1140f. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZDA62273180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be9501d0206820b0ca53282bc81ac3ce7d69eb602186aa10a14810678118989. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:18:31Z), 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/QZK6P2358250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197ed65affab0eafdaf02191caa64e1c29dad089fd2af7350127f680dfc0a31e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6P2358251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0272f976fed30ba9e3c564bf54b57389df6c0a49626b5ffbad3a7609d85e77a5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6P2358252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5980fdc857398808b374b6a4cac7923d32d874ce41e37bc1fa71417f09148b31. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6P2358253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf4e5b92a317a94bf8fe371075ea13d1387f8254d6438449a5c753500f50d5. 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/QZTBD2343881.