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 0xebcce6d2c5b5ff6955c079416cc7435b927d5a91c25b6d773044a36997d97b10. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d89b845c-2a7d-4e4c-a2ad-5417c0e7e12a.json and https://artists.proofprofile.net/proofs/artist/d89b845c-2a7d-4e4c-a2ad-5417c0e7e12a.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 0x06a177d8af9d2fd2f48c8bbeb288aa1aecc6a5b701f93bf49344b89fa3dafe2d. 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/AR1GJ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd8936a084dd2b2459809fe7ffa8c31b73c065076235f67c4ca8d264f02491e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AR1GJ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d97e926673fa4d4a4bf2c14ac333f9e4eadda26825052442f78287c767eaed. 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/AR1GJ1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd0b3c9b562b17161694ede333bd35bb5e015c0afb06374be5261e280f61c43. 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/AR1GJ1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c13d7bd68711e62b47d4a643406ee648b7ed0e2e2ef03a7045a9a3a13fbcb9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX3Q92435995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fff6d6422e1fb2d4d5bf88dda13a3511015b409549b98630ceb2a21e7a8f62. 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/ARIGJ2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5095a03ba33bec9e41d4689d93d07ffd9adc7af0777b52704bb137d56dca95be. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/AR1GJ2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93255047446074e5d264cf31c2bbcbf2250c859107696ffbbbf3ea886e007452. 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/AR1GJ2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a64261f420949668fc6761e3fd54fca6b39ac951383dff698e6c0cb3321057. 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/ARIGJ2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156dee2e1a7f0346ebfd29b9333b1a8436b070ef7becfa92336852990bc4b5b. 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/AR1GJ2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee67f2bd5b2551fb45a38b7cda238647591a310c5f520b224773b3ea67a9521a. 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/ARIGJ2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d27ea235cbd50d8785a921a124cf0b01d516fb2542bc7fe729451d32a164f26. 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/ARIGJ2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e00417db7fac096f4ab7a07f23fb2735b99dc20033e0d47bb042c6625748b0a. 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/ARIGJ2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3163b73486252aeaaad13642f8b96a39aa02f142cdd92fb8cd8a2a79684f896c. 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/AR1GJ2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45601a1e1a8cb7bccd13d11eeb2bf719c4beb065f55f976960e76a2220c43a72. 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/ARIGJ2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5dd97a1979c496026e129f43ba1b696dec0ec5210c645d78cb917dbb9569d5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GX53U2487102.