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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c59a8ec58362651907d7311bc3fe9d6259c5e651fa9f1e056fbafca636a462e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783ee25c3fcc6d494ec1a1ca009b64694d4138a79f49cf1cda938b4826223d25. 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/QMFME2242224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a495b5afb8e9f61a3a4c3bad7038a151615fc24b6212c6c7a4b49ebcd117296. 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/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 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/UK6BP2200414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e591a42fd7ffba629d816bb05317d54d8afdfe9d4c3231e46d76cc2f24c3df. 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/UK6BP2200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096b4f5be8a1aeb09d1122144860558268099f7fe11e1af34fa41163d740618f. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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 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/UK6BP2200409.
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.
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 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 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 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/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 956312 (2026-07-02T05:09:12Z), 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/QM6P42486807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06412f386b91072e97dbf7ec4b2ece4fe1e374ba0b2409b04750c83553ccfd26. 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/QM6P42486810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5605053494ae8b526b28e525df789282b02f6d9b2fc1490b6e8896d547ae5228. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6P42486811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd97bef9cc1437c29ffde2f1a89f39b426a650b16149073f4cf32fad64664f97. 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/QM7282422302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e7f006c007c4ad462b8c310465a17c6bbb99da6e8438383bd65f3651800918. 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/US9C82200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387b6139bc131b0ad5c1b3e52640fc151f287ebf3c783d02a715dcd09a734c03. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMEU32105022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453e84b06843e26361e6f848359f593b104c9c2f977add7d1617180f37f7c3f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMEU32105026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1619eecb10e1a0a8dfd332bcdd807729f51d9df7c216cb4b2c8b633b7a4e0c66. 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/QMEU32105029.
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.