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 0x1da1e5af39e5ee1d16bea36cd7957b35f7beecae78a058df61aed6f6b9730b02. 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/1937f0f3-bc6d-45fd-80e8-7db480f6953f.json and https://artists.proofprofile.net/proofs/artist/1937f0f3-bc6d-45fd-80e8-7db480f6953f.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 0x64581d917d63fac14b8acc7cd63d6afeaa2c6d397886f182792b59945dc641b0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEZ651372838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922beb261b3b9c0210e2e616be9d42f2e44bf65afd25b567a60e817f33e2b773. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USA2P1851775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eae6498ba323ec380d492660b50790a83094fb4bc3b0955e99569039c2eab8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P42209919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf17643299973e3dae644a5aaaefb27530414d871d6900434728b4d375932d34. 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/US4CL2310085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf17643299973e3dae644a5aaaefb27530414d871d6900434728b4d375932d34. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US4CL2310085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75968c5a58234cd51e51900dae6082a466969c144f8c0e6a609bc9b58a04083f. 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/US4CL2310020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e40178c0be45dd68d23703741e4ba7437692a101c8dcd0b3079ded508561fc1. 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/US4CL2210062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfdc241fa5e56eb2929123370b4f25208cfd5f657b5a50c4c1c74bfab493f85. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US4CL2310081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc94ac44e9f136bf4371cb5aea843b799350ce84db964cc0605e0042382abe2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US4CL2310089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe565dbe70bcd17eb138ff5120a058664b05df2795792406c067c5db779af5da5. 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/US4CL2310090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf17643299973e3dae644a5aaaefb27530414d871d6900434728b4d375932d34. 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/US4CL2310085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75968c5a58234cd51e51900dae6082a466969c144f8c0e6a609bc9b58a04083f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US4CL2310020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e40178c0be45dd68d23703741e4ba7437692a101c8dcd0b3079ded508561fc1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US4CL2210062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846fcd9518389d749e876d8d27a3893da8cd58e33d98cb8522d1bfa191efc744. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:28:41Z), 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/US4CL2310086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfdc241fa5e56eb2929123370b4f25208cfd5f657b5a50c4c1c74bfab493f85. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:24:17Z), 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/US4CL2310081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab814178023e0e7e3b8c111ffdabb42d882a28700f87ef12999b93cee4ea948. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US4CL2310088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc94ac44e9f136bf4371cb5aea843b799350ce84db964cc0605e0042382abe2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US4CL2310089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe565dbe70bcd17eb138ff5120a058664b05df2795792406c067c5db779af5da5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US4CL2310090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e83cff7a65158a85ddb476094871a80e5f89134d42367db89b3cc0bf45c2b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US4CL2310091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf970331c230fdaa29d6b9eaf8a5887ddd42ae94878479f042c2bbeb3a29d92d1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US4CL2310092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb41aecb6ce42a16ebbc0aba3ad15f218c5d8f5431f654f67cd7db3e8d717d7c. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:33:00Z), 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/US4CL2410041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27941307c153410bbacc22bd748820766a52519f10c144cfb05066884969bcf. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US4CL2410042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb008356e33504cdc619e411b3dca3f68a8fba38f56fe6e10cfaaf806af7613. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US4CL2410043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db14ca2eb19060f18569fddc2c53343585074bbd523c71b843449e808b6b775. 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/USRC12203320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cb15aae30660c765784bad31ba504fcf7ae6dfaff9fc0badd3d6ed4bc89b8e. 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/QMECT1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8522601c795bdbef172a8ffffb8afcb87db83d272575ab3ccf15162e3b214410. 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/QMECT1500017.