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 0x25f9825420a5497a8dfd0c5f740fd2a27fc33209acaf9e9a87b2c5e3fbc2a124. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7277b3d-75ef-4b3f-9974-9884ab12a615.json and https://artists.proofprofile.net/proofs/artist/e7277b3d-75ef-4b3f-9974-9884ab12a615.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 0xec78856f544287e0527dac3c278df2d82d66488307e72366710ddab4af435fc8. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/IEWNY2438043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b6277c347ed09080e961463b217fc1e870bdf428d8ef403eda2ecb11ebccb6. 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/IEWNY2438034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7041bce0daeaff8eec9d4b4c5d2c635997c176ac854c3d4d2d8060824b48080. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/IEWNY2438033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9787be1bd979d122ba6129e12f8da5b0bb030306719bb6de43f862d939823a9. 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/IEWNY2438037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23464e84939c5fa1571f61dd58bd5aee0efb54295fb63aa0d56ae15edf7410c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/IEWNY2438035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3044afabc043e80736b6335317546f188ba43bfa43a9f6e341f083324ffcbba1. 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/IEWNY2438036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44118878179f7e25c48b64b9c8d9ed7d3013f263db69a9c2ff957446cd2b552. 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/IEWNY2438038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacefca0498757f98d68b339d45545a064001e1adb66ea0ebea3f40a5ec0b7855. 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/IEWNY2438039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec985ae48c123efd703d9eb6d73e6842e11bdf821a406db377f47a1987d018a7. 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/IEWNY2438041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce259d45a335e09ccfefe8c8fb99ac2a7295c92e44284254f64b50bed42c386. 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/IEWNY2438040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ff8714035e0980ccf7977d1037006dc119b7b954ffbe043281c3c263c36b75. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/IEWNY2438042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f48fc0af45f731b17fa57f0d37dc4ed36130da8bf5d8fd30306d57fbcde8ad. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/IEWNY2438044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba44314b816ffa2cd08db1f4b7cadf3cfe3467de07f451a446612b681500ea4e. 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/QZSYP2392009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf389be444467a2a4d2ad3da559ecc3ccfae92e0c953c3b82899825f377581d14. 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/QZSYP2336143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aa02ad4f35bc476498fb34f9c7773a0c7f6bb66d50959ac51e1893a0f6e892. 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/QZSYP2360881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cd95153a1ebbe7311b38d6b422840bf53c5773eac4069d46296ef91b6da34e. 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/QZSYP2317542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d1df62471c96a5230e2a43c0da65b1b200b4c111035e2a822f1217c670f408. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZSYP2369316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d96740ee678be166f76ffee2b1d8b689ccf163753f3d12b03150a460372599a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZSYP2360812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ea22c69e083618d240cbe6e1e602cbd6c5e645968f5c9d6411615a3ed2bad1. 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/QZSYP2318452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2217df1065d8502661066fc6be2f739efb15f955e10a1adc5215a8227d4f44e3. 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/QZSYP2356368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ccfdaaef6c377bd1d56b3aa9a0abf258c48598a9fce10884446fb6216a1cd. 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/QZSYP2391947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95a9c8d98b1f1cfa2b5e69958611fdc99d7d91602f31e35be8ad2b239c60a97. 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/QZSYP2362072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee52712463249d061253302dad658e46b1cddeb8d87a526c6ca2f690297ff9a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/AUGBT2421996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4fe2dc411e03b24d03855b6db1e39b44e41c253807336fb7f8b9b42ff4d3d2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/AUGBT2422001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9290f7f7c9c4c87ba0515955acb9549a9a95274d0bac2848fc39746b46100769. 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/AUGBT2422003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034d1548c72eddd59efef448b555a70f862dda1853fbff32126de3a20d7fa1eb. 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/AUGBT2422018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b37e61f9a8324e47083edb0847340262ced3e21eff26e1774ff0811274ce0c7. 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/AUGBT2422021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700ef46262262da9f46a0317717edeed56a64977f3c41fc60e3e0791bccd3fdd. 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/AUGBT2422025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf456a59c1e1162b46fc0f5f86b51b1d549775f746da2349f42a1e549750641. 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/USUYG1218408.