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 0x3f6ec4671787cdddaa885c013ad71c0a38b40c0de9d19f9879466f58c24e1c91. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00f94cc3-a3fb-442c-a651-7d8adcec263f.json and https://artists.proofprofile.net/proofs/artist/00f94cc3-a3fb-442c-a651-7d8adcec263f.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 0xf91fd944ef147ab95804ec25df9353822dae8c2745f7dd5494654806f29177fa. 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/AUWJ21000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172009478dc57355912bc62022acb4a003f6755d9949bacf4409cd89822fac92. 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/AUWJ21000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edb3a288ea2c8a31f84a8734372b0fc7f3b6e194af3eed88404c3ccf442750f. 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/AUWJ21000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfe1c7fdc821138f6f1ac9dfeec48d4535ad869eddbfafccf08dae12386edad. 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/AUWJ21000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe724b927f056c75af06e0e7755e2af1f593061e5048e78a265b908a9eaaa1061. 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/AUWJ21000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144efc9ef22cdc3e33e8425aa18a8558dde3b1deaf56701bdf68ca6cf3377c78. 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/AUWJ21000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0015b7281a1303e983e9167914e37caecc640b065d9965bac8c5556d667288dc. 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/AUWJ21000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e89449a73bf2ff13b3332bc04c6b0209d7ecf4977ac858def1114223b844b4. 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/AUWJ21000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f7acc6e14a92c5429a59cba5a0080ea36d0d48e19441c25f7567cc13decf69. 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/AUWJ21000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782ee9f5a61954f8dbfb01ffc88530d0044e999493215dedada07d20e0696759. 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/AUWJ21000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234ab78e53888322e4e70f77f2520539361cb4e883a74db1cecdd867480f824d. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/AUWJ21000024.
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 0xa14054513c003cf0e1882a4c1e557a5f948327966bc184c6aff65d9ddae6cc8f. 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/AUWJ20800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77b82aad1fd9b1167e224f93b6437ba9303893248f325e9b53d79efbb20c3d4. 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/AUWJ20800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5f85600adcff86a564e93fe56c55fe9541446f82f742caefc03575f754f41b. 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/AUWJ20800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc21a4addd564a29c5760abe6a8ff504e71cf3e543b92ff5620f02791fd4ea47. 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/AUWJ20800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacba213163ec22ae88d26033d4c491b8e89e0e5fb52f1f13cf23316b4180b7df. 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/AUWJ20800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f9366f0a691811eabe05d974114a51fbf195124a11f5a646641ffa60ce0c93. 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/AUWJ20800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339d85a28b9bcb90ef87cf30349e1862cf2b5a76ff40aac9b574befdc79a0d01. 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/AUWJ20800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186a94a9a3142975cac553c250f5198a02e4baac328a1f83842ae089167be9a8. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/AUWJ20800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7906694bc37ba86bd42d6b75b337323f80b66e8af56c5ca92ea4122552e7a650. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/AUWJ20800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2551f7c7ecb4afbe46d6258af1279b3e60b2c93019c04ddf23c26a89a8c1eb6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUWJ20800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72a7cb95ade632da44325c8181165e8e2b46d433f22ed8005ac1d7869db7767. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AUWJ20800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b9dd76bec54b6ed6381c4ce776795ecf5c01f14a4061ecee1ba200d4bcacb1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/AUWJ20800013.