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 0x5c59a8ec58362651907d7311bc3fe9d6259c5e651fa9f1e056fbafca636a462e. 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/669f9fe8-eaf1-4fb3-8ac9-1a83109bcb01.json and https://artists.proofprofile.net/proofs/artist/669f9fe8-eaf1-4fb3-8ac9-1a83109bcb01.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 0x783ee25c3fcc6d494ec1a1ca009b64694d4138a79f49cf1cda938b4826223d25. 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/QMFME2242224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a495b5afb8e9f61a3a4c3bad7038a151615fc24b6212c6c7a4b49ebcd117296. 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/QMFME2242225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e78b8ecc740fc773105a55ac7d04b3351fc489180b56469d3d66b030241fce. 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/UK6BP2200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa491b4ba5a2ca689efc644550fe3d3fa55da79156488dc0b31db419f0d1b490b. 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/UK6BP2200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27bebf158837cf3d5802347e549702da68903f8b99818be4a88976179468dae. 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/UK6BP2200414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d23d50281e1269a1e92b6638f53516ea72cdca81bed6ef12084f7f05b89cbc4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UK6BP2200412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e591a42fd7ffba629d816bb05317d54d8afdfe9d4c3231e46d76cc2f24c3df. 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/UK6BP2200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096b4f5be8a1aeb09d1122144860558268099f7fe11e1af34fa41163d740618f. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/UK6BP2200411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc244df0c5b353f732f6da4176e06ad6109e16326226bd956f574ce157a0d5e2. 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/UK6BP2200409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5f0d78a4a924b36328b6a1e6874818c5df6c6ef842e56508dc15beeabb486f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/UK6BP2200413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6e244c9b790b709af8a84ad7a312ebdd027804a870db02395aab85e43e3a5. 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/UK6BP2100344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f7fc39cdfe28d8dcdd1852bfb852f0b26f8645640c3d7eede87d2c4a82a066. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UK6BP2000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8656251ec2824fd8a68b05dfb0f34f1abd8b9d5aa70504be03432b4a687f94f. 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/UK6BP2100345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ecb4976f0861fd8a1760cdc6914a055338fd7c3bc2abf9c0d66098cd9a395a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UK6BP2100347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf12ec6dddf613f33aa1a9112b9a3e61d43d52977dc8e3df4d610089ced0163. 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/UK6BP2100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac6dabdee2effae34a8ede58929401f0b6b5d90e05c193c8d4c57689c58832f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UK6BP2100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11933b201e12acf326aed6cadc960dc04aff7bcb82683cefb66a1d358e07dcc4. 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/QM6P42486805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd375357abffd9c2a7b947ab0a9f315b405c8d169fbfa647afa7e5a3e085fe55e. 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/QM6P42486806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aef1fd90b0429f9d24cf1b062060fd503d62292ec1846a117dc1823a5cd768. 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/USCGH2472452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6712dcda7521499ea269db1078117c5bfcd036c1dcf4391f0dc25bfe6976de30. 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/QM6P42486807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8c619cf62a4f3a23562b8b0bf61acc096c25971e36561fc7e07bdf271fd153. 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/QM6P42486808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715eacb31aedf86c720b3235ebdcb85e727a0a0c62266a8c09ffd3081a1099cd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM6P42486809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06412f386b91072e97dbf7ec4b2ece4fe1e374ba0b2409b04750c83553ccfd26. 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/QM6P42486810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5605053494ae8b526b28e525df789282b02f6d9b2fc1490b6e8896d547ae5228. 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/QM6P42486811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd97bef9cc1437c29ffde2f1a89f39b426a650b16149073f4cf32fad64664f97. 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/QM7282422302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e7f006c007c4ad462b8c310465a17c6bbb99da6e8438383bd65f3651800918. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US9C82200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241b85477b9a75d8bcbfa1fe822b53f08dfef2d961007307d056381a7fae91c3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMEU32105020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e8319442fb86554ebe81115ba112b8e9afe000501091cb211149d3c56c0ec4. 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/QMEU32105021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387b6139bc131b0ad5c1b3e52640fc151f287ebf3c783d02a715dcd09a734c03. 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/QMEU32105022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e966973f285a6e13b90ef90b9c64166d27865c66a350d3cec4a49ccb6aefa9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMEU32105023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b053dfb0a4475e1290c9c3c5ce6d5f07217dcd4b8e685caade3e175cc3b942. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMEU32000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e53d3ee64864a83c6daa73ab2da6e6ecf42033a975f0815fba951a43d2d7cb0. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMEU32105024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2830e2f8f06a94109796619097361cee84c29c39fb179658b19b868051aba641. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QMEU32105025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453e84b06843e26361e6f848359f593b104c9c2f977add7d1617180f37f7c3f9. 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/QMEU32105026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb54406fc9ea4c258f504b373b3b6577ff784948985de3dc5c1a29d72bb8b52. 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/QMEU32105027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d780f719d52f27dce3c34829afd35555a5b1f64ab2b91c0a5aeefef24c63eb. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMEU32105028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1619eecb10e1a0a8dfd332bcdd807729f51d9df7c216cb4b2c8b633b7a4e0c66. 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/QMEU32105029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66706e9655e85937cd720f787c8478000251abfcd56b7373dd0a177ee469124f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMEU32105030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba417c9384721f42d88f638ec63f732fec174bfd571d50fcadeb609d7eb22f5. 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/QMEU32105031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ef16a80850a8d010ec047d7c181f79715afc1e404ee511cd77fe5072bcab7a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US4S72207001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c263c9db29ceb602f5156a3c25f6fae297283eabedc3292b9ce334884de780. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UK6BP2300421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c263c9db29ceb602f5156a3c25f6fae297283eabedc3292b9ce334884de780. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UK6BP2300421.