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 0xe098c9f132db3da94e56fea07e5749f2afe8ed1075ab90678c0f58098819f3cf. 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/c6d1638e-71c5-4cc8-8146-b78cc3897659.json and https://artists.proofprofile.net/proofs/artist/c6d1638e-71c5-4cc8-8146-b78cc3897659.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 0xc99dbe6e07969359771406e622ff3a8a38aa659c73bc750c9273a5a38d1d8ea1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAGU2374734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ecc6e9083d3dbbda5d85f950129f1575a5b5292c18dba86788fd46c49965f4. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/TCAGW2335598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f918b4a04ff16be066f533a19f3a2e5bb7d46211ea89dbbad7fd749e0bd1a3. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAHD2396163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1edc4a12aaf9642c04461407e87c6de7622ff5bb1e22189922552b4c49bc4b. 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/TCAHD2396219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59629b7377047de29d1774dcdb576a4fae1b2630ba10dffc72a41a3f7ab1bdd3. 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/TCAHR2365996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7223bdb7f7d61b4260e14f5f3289c84aa0e943a7c8cbf1283c98bd453782e797. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/TCAIE2487782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e29d4d8a71b75ed1087d978852ebba8c63fe63419e17271993cf048bf8f0efd. 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/TCAGR2209982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a40eecc86e9352f5a25c689997f2126a030aac2f38d0c4edac3f6dbc1f08a05. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAGK2263431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a1b886ae1bf06f7eac6c5a973680e2ffd39b8f01cc88840068bb1d6bbb7ade. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DGA0P2446351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd15824a1bcfe1381c341682cf66b672d1255ecbab47385a4c260112d9dd4d5d. 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/AMA0H2400539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d39a95b5c118c27c54b038711a0d2b7409c8641541c7f6daa4836117d606af. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA0R2463464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298a6f42b950d22c73867d87ec55b26fad2102399c0cbbbff9ee48fb3b4f876a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/AMA0H2400680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4f04b534a7ea3517339d5ab93fd21f1f2e1ccae29cd68d6b5bca4146b49345. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/AMA0H2500520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bfca8c3ce86a248d2e427ea3174bccb2b12beec0e7daf30e93c5552ae21cfc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AMA0H2500574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f4489e9e6f889c9a2a103d246340282104fc2ad375ae4733eff09aa24829ea. 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/FRX202559418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1a751a2b1c29c5aa5912163ea6bba7e89f78c11dd93aba9b784db1a99ea6d3. 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/FRX452550486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e9d7fa53c5d97963c40fd0b15904fecb4bc7a0fb140bfb03da7736fa3a656a. 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/FRX452551931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd48fd77f5d4ce4b526c22aad40aaab3e28c3a9f7d78afbceff5e1e1a8a699b. 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/FRX452582311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9e707371e15d6b72d6bd75728ddb126dc1b36e41ba6505635bef8b6187bda0. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FRX762507448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de49b93c7568057699a3fc09b13bf15a46fc6b306c59f2c4f21e480cfa9c996. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/FRX762575841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c930c3ebc0fdcaa1289fcc058cf21bc4db64682f2c981fa516b56376b2e70e8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX872570697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc68ce48dd082e5da8c569cde51838f7a5eeb6ccb700c9363243c4086a8b268. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DGA062523536.