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 0xc5238686d79a9a2aa138f0b93732f18aded60f4a95f0361fd10c316e187ba332. 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/f483fdf7-2aef-4b51-b72d-43e5cae14faa.json and https://artists.proofprofile.net/proofs/artist/f483fdf7-2aef-4b51-b72d-43e5cae14faa.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 0xd3681ffb34fe3f1fc69b2b713a368decf4cfdbc6cba54a16486a1c6d8bbc5855. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CH5711500325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59186fc19deddc3eec98166f8baf8699c6476e7933e700e51f5a8b2c834f217c. 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/CH5711500326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eee94a7a031c40089e759d9287d44ee823d1d23c06a2c2dac22d557af771e50. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/CH5711500327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50c02c74334f22ee7f84a7c6a8c864a6cea06d7bef2d5b2752b2ea7408e131. 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/DEA451508690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac969a8bac3ac8edc59661dd787b1cfeb20d2b4b56e91e3ea8bd5ef2e14a7ed. 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/DEA451508700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2edbe73bf06297906b89a3fc682def471cbde6c8028b4a98debe2fd69262f5. 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/DEA451508710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157c8bcf2f9afbe0b657b399cc278e259426ced4f4ad1d6f3e14e58021799521. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEA451508750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29714bc96417e682a7bb63191e8767b9b0e8c462073d6ef2c234a44c0a5d28e. 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/DEA451508760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76de8888e0f42f758b4b8f76871be6df0e8d2ec0c0de81a22234a94a34870a6b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEA451616220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b04778b84e740bb3cb6fd2f300cd1307d2e81c4aa854d90ff25c50ffd77f54. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEA451616230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486f7ae403f1a4ad3179a454a234d9347dac8e3b38c8757981220346710e5315. 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/DEA451616260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0eb19c75fefc134ae039fe4b128558c65726c1650aa9fc544db8d022a05fc74. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEA451710800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a44579b6383e9c786f3e3ad600a2f360c19d54d71bb1488c19d97de0abd6c2. 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/DEA451710860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaebd57d3e0322f747798edb0ff3934c34f727b65c1a254abf2b53e75822be0. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:54:44Z), 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/DEA451710890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d24a2a645b056a2cc56cfa4b3e16082f97a27a93d86419364a457df0d88c04. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:12Z), 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/DES131900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515510a6f0eecc7be5e425b0c6d1ca0411e76d546236a479b7db7ea903910d87. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DES132000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87c966db4a3ea539021eab28d3a1ddfc3485d942dd999aaf7017ce20e50bd9d. 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/DES132000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14eb8b76c4285f46e6080cb6bf4d1cbab4e0f606e5bde53e9ffa9a93cdbf39c8. 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/DES132000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2ae4cbc784ac7ca4fa3bd5f27b2408d2ce5cb29c226b55b2b1e722adeb86cb. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:27:55Z), 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/DES132000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0950e987049b88085a05b69f5dc20a058762bcbcbb58ef81b23fd9ee60f3e19b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DES132000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b99706f11a9e0134f93184a0bb113cbe13e5b6058536f27e525549729431df. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DES132000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6a3e08424fef03bd12f60fe11ed9e78cef7953a6f95a52bd40ee86a247c3cd. 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/DEZG82111110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d704257157bfee933ad1528b4a90b1d16115aa49e10587b5d5e775eedd8c739. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEZG82111140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0636eb33f912616f8dff5ba1389638a74dd29ebd7ffa37095cfadb9f17eef219. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZG82111180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d632dd903787aa88049f6c56f5ca0cef71951553c9425ebdb1d69cb7e72933a. 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/DEZG82111190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e0b7a9f1126bb4ed7b3a331ebdd606135607dbc0e16baa908d4cb469912f4f. 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/DEZG82311710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a89d25c1dfb19b0ee31c174548157d7b9d454a0f51d203e873cdd751a4a35da. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEZG82311720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d12d2eb3ea417266847fd713c96e70429c6eeffb3b17333c7373e899dfdc90. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEZG82311730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324fb64227e5484a7227ce2ffed500ce0007507c1fd570c102dc2b467f06707f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZG82311740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673f84251c136df8759f1484d5a8e00efb01541187e2572b71dfd347d452a0fd. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/DEZG82311750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e114019300ba43e430d633268e85064bba3e1069f7dae7ffa2cbf8a2899439. 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/DEZG82311760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc016ccc284cb2ae0e8ff2e769b99865293bc7e3d53eb89887ba136ef1ab62d08. 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/DEA451616750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae4541961fbad1e3a8613308935174d23d371c7b3bc83b1373321799477513d. 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/QMDA62223427.