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 0x5bf42aef1ea90df88de3f2c4521b8dde1aba7fed1ed3e00562b9dbb382a90c19. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb00812f-46af-44ee-abde-2e2f6814c23a.json and https://artists.proofprofile.net/proofs/artist/fb00812f-46af-44ee-abde-2e2f6814c23a.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 0xd42ad7b422340dd6899fb7aafa97d6373c6f59c24bb1696864918f5107159084. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBVCE2315101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19f7238be7a132fad407b9a8601f50f1dfa280b76ff77dd2a90e241a0fa6d23. 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/GBVCE2315102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a15cb571728a6924442c641b0e396b8efdba11856817a7f65d4606f3406d70. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBVCE2315103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb6ca3b28ced3a8449d4664648ecebd4725f269b47587bfa2075c895a964400. 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/GBVCE2315104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c002d41b9e2d5161e4f378c395c5ffa3974ec51fee1b9ec0e66811c1c35a90. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBVCE2315105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586d25d70f28dc83dffc2019f56e5dfd15ed673d32fde44650a82325a779deff. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBVCE2315106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f254e6ee0497bdc652af44bf5e2bb96f08aecd9da70cc6071a2c1b28f5f539. 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/GBVCE2315107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa702641d8b1bd0809448aa5401662e91a3db4cf37fdd16f3173f4185927fc9d3. 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/GBVCE2315108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc39d0f2cbd4c31d384652f2ac28106e50ea5d081578491f194681a55f3115b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBVCE2315109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1305eb9bab00b4ef1bee366c6e796eb880415d8a00c4cb32a847d2157cadca9a. 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/GBVCE2315110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2996801b4db0aae899e884e904cc2a83c3569ea5443bbe10b7b3845a3cc5a1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBVCE2315112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f04239761b6815ef153a347d910a4bb9d19d5b86b9ac0b48f23ee148d54106c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UK4MC2000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a73616573fc811662cb1980735e49532295e971749a49da2bc67af093da1bf. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/UK4MC2000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a15cb571728a6924442c641b0e396b8efdba11856817a7f65d4606f3406d70. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBVCE2315103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cd30db1b0cae3e7655b8912f82d2d8b46dbca5da07aa96145df51de6154953. 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/GBVCE2517301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db58b64887c92a99e7668b196039a6a42f269014d7a9d091da6ded664ac195. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBVCE2517302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7678d8c7ecaa95d065c41d77d88a2f90d0d605fb1323736edc0bb54ef9879273. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBVCE2517303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c288aea9f5279d54be51a2e94c7620d658264ad59dc3c9b000c17d0152c1396. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GBVCE2517304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491853297f25d37584c9c43d240336e16701279a3a7eb1206daacd6116b04574. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBVCE2517305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1a288cb86bbfe2d8070ceb78eced3f91fd20e13ec59c72027e0c6cca1f6679. 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/GBVCE2517306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdee124a601ddc5c58f031950f19bd5be528cb84fa238560712369934b34bf80. 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/GBVCE2517307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd1cd16caa5dcc14421fedf39dc262185960211ecef3a29571cfbd2fe65c045. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBVCE2517308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf315327b43a6f784562436f553d0c419c53d123c0899b1c841e3df34e73b7213. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBVCE2517309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050947698d7dc51495ff9a268cfff1ac1ef7fe9349f5af895cad9fd30242f4eb. 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/GBVCE2517310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6111135bb676db27802201c129ff728e4debe3c5ab9bca300d8f6b4376529a. 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/GBVCE2517311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58061ee988cad1b03c7345bd1b59d2bdc6012cfd8250d03b466fc97f9e1d9f2. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBVCE2517312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdee124a601ddc5c58f031950f19bd5be528cb84fa238560712369934b34bf80. 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/GBVCE2517307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db58b64887c92a99e7668b196039a6a42f269014d7a9d091da6ded664ac195. 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/GBVCE2517302.