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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75974704e3285c1b3db34f5852cba1b38ee0257ed857de905a8d0eac136db5cd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9340389e-bef4-46a1-a98e-cccce3098450.json and https://artists.proofprofile.net/proofs/artist/9340389e-bef4-46a1-a98e-cccce3098450.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9614bcd5345a4187bba07c7c9ae93546268f056cd9e6e50780ebfc46c8cb9d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/BRMKP1100489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb26e31f1ee3318f0c331a55fd3ff6793c0266041769bd87e73f0cd375a476e. 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/BRMKP1100443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8dff615006d26136352069b3f19c787cb65582878514cb7f36c733b9cb95e5. 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/BRMKP1100442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e2226cbd5a5ef3bacf0d45fdda79bde55faeefaa87409ce241c7229000883d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRMKP1100444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cae10a89665847107504dbf766c67181df5593f7001dedafc979ffae3d8aa8. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/BRMKP1100439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3447df60d5a522483a907f3a3ee7313698f32a2bfaf68a35bfbb5ccf6fac8eb4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRMKP1600682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3195ec52a635d24d874029482cb83457c2cc7602fbebf715536dc801ebdb7e. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/BRMKP1600683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e742cc42a192e8289a65b63d9b62769cb8e3121dcfe7899c9b25529a4deca5. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/BRMKP1600685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d081021b893def125e2f89c7e925d1618b76652c1ccdb502875fa184ace730. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRMKP1700433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b600ce4a44dc9de476965410fb2e9ab59bd2c2777a10152f7b6da023576503f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BR1AR1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b60762c232022109f9b8df4bd47710fe192ad13080ed67774279e37de968c1. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/BR1AR2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0876dbff447d90aaf570156060f61f61194303e281bc587441da5f2e13ce13. 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/QZNJZ2241385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495b38049531907f1edd8bf6572a62ad851731e02796d6e6c79c2c3799825f9c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMZ92516347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7818995e05cde5485900fe459377ffef14fcfcd240a1e2c564cb34964e7362. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRMKP1200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe538b11858352c63d94d5cecb4d2c2217b26a8b5333578f5a3f3f59873645f4a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRMKP1400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabed810d6308fb5d00dad8306a8b291fc453b8ce2ce8abfe2398153fa6399935. 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/BRMKP1300267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f6969dd38b1f871d32691db5277c9a9bf8b36ab788031e3128d538138de39d. 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/BRMKP1100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6953902f9e155a159a51b962456a04e5413df39c6a998b9ddcb30f35e385f2. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/BRMKP1400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7b60fa168d95938f58eae4c8d364ed990378158f2c80dd9a34f84c109b0630. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRMKP1700546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d081021b893def125e2f89c7e925d1618b76652c1ccdb502875fa184ace730. 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/BRMKP1700433.