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 0xe27a7ee4444950daf165cb4fd58868a81a1140fcb077ab592e51e3d735e5de40. 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/69a581cd-e900-4203-8da2-a11d4aa9c462.json and https://artists.proofprofile.net/proofs/artist/69a581cd-e900-4203-8da2-a11d4aa9c462.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 0x5b3e9411445030f43974a7bad492b50898645a4f21be0c996cba98ec134f7834. 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/TCACD1538171.
Hourglass (feat. Monsters With Tiny Mustaches)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5976050cfac939f0a793de63cc68ce516655fb5be084582d33939648b6e1f504. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCACD1590624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1701b280439d049f389fb7dac0f59b7bd79cf25340d523e9ae0b1694912412c. 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/TCACK1527192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf096d92a1fdbcfae0283ab16d1117bc610908b3ac9ca5384cb48c17ec1a824c2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCACL1675944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f9aa0de514172def686f905fe30b24b603a831175a65a758b5c1ba58585b1b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCACP1633033.
Serious Sirius (feat. Starfish the Astronaut)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce84e60f44fae053731e6cc2f7a4d8a0be253a21fa38a0f8df50daf8677ea877. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCACP1633038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087f212a2acf9e59138629b13233e794eabb81eb672383b3fda0ab3eed7749d3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCACP1633039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28d2aafba44a98e0b0ecd3dbf2371b740301e70cf86c715842c31d1613d5dc9. 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/TCACP1633042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7df4732b5a13544e3c4ea8f49e76b4ea5b44390beae5638d85b6a799368c634. 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/TCACP1633043.
Killa Killa / Dead Man (feat. Starfish the Astronaut)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a93430f7035fab808fbe12074df4c68ed640eb7c396c83286bc4c282acd7215. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCACP1633045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c19d27b6cea23d348148de4afc407a5db9e62418ca5ef55c8e5212692683a0b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZDA41871205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1c1a25671bbfc9c057157bd4609b5827ffd72214fb17f2fdb70dcef9f8b57b. 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/TCACW1778866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b9119ca03742e350d58168f9c1ed9f18022feaa4b0a591b41d6a1566d72bc1. 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/QZES51806447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9639551bb48396d90cfd2ced30ebb1d69ce7b222da876ebfd1f798cc49608f39. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CAKHO1909451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85376d26c7a87a530e8f6d47cbdb80cba144bbaa60a1cd7c8c319866118ba5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CAWHO2023558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf266b58569d6e38feb4af4b038e9769c33ed00eb3bae8e3641cff0f65600df6b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGA2226335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dc0843e131b4b3bbf269409d9fda6aa6c4c5d355b0659e2056b25fb1b0f61f. 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/TCAGK2262983.
Waiting (feat. Lox Chatterbox, BLVKSTN & Salvo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381c3da1d0d7736128f93ec61f7615305eda9e59c047e492ab8187845a3bb8c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB2LD1800878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fe52b4f1c408209f523b7ea9f6df0df6098f0aef73c5515abe255c1fe226d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P1830120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9b2d5b67a706f1678ab7d4fed8c91a5aedc9e3d73f704bf3dd8c454d2f805c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCADD1748083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402181783f484a2975898d4b582a57b4c41d0c3e28342a47a9c689af0463d4d8. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CA5KR1844913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e581e2356ee3ea3368b8cfa80fb0b62349b1e88b8609221203c3cd33e131f6. 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/CA5KR1844914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328b8b8d052adf82f7f2802f1167fed8cf831b2d632b77b994cd70a49943f9bf. 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/CA5KR1844915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4776e64f08483f4ab4f4fa1340f257b82e89d47744015c3480b96c3059ae1e2a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CA5KR1844916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c186ca4e073460cd4eb78f9ef9b39d45c3eb62454e34a97c4d37400126b4b52. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CA5KR1844917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6b99db50d60f48855d676cb38be77f9357ae00f05d745ef92c9d052103632. 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/CA5KR1844918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e82b16f17e224589abcc90da5e1203876d71702a0c60deeae5d94caf5269d40. 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/GBSMU2552151.