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 0x2ff5af02bf395620cf112399d71c96ea7de93505fa9e9f34600c50f7d361275b. 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/b4fc5ea2-6930-4245-8e68-9fdb8cc2de45.json and https://artists.proofprofile.net/proofs/artist/b4fc5ea2-6930-4245-8e68-9fdb8cc2de45.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 0x2daecf330e394a57bf56da5379e36707e4acc3f2ec3f943c7964a47a500267b3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPF700902204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b2b74e30a4eab9c005bdbe38a4cd3f9055311c7bc3e1e96c7ed7c3b5392f96. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/JPF700902205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf868a9bba17d068a61e06f1f76911feee28d08a2a67d58b85c3491017d90f972. 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/JPF700902206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf96134d207e3d1b40f61e3927237f14d4e5a31db3d301e7cad81727ca5628dc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPF700902207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed24a6d3ef7a8ce9ed7dc5dd2b600a98dc17878b5ab3de2036f77d2c08ba7ee7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/JPF700902209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bf8ae5b4b6cf30a4bc31a152fa855c912a18af291eca29967d498551d63472. 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/JPF701600401.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3fdb01904a3a2aed9b267c90d50bf0f628222ae6219ea4c3fbd75b7ee39c3c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/JPF701601001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcd9761f32fa97c87c141f5cf08a5889431315fb06f844200746adfbf3e1cbf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPF701602002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22173f0f6af68b8cab990ff415e0cc40b1c048fc357a0340b5d6c1e788e09c1c. 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/JPF701602001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63c901c2add586141be6800739bfddb0b5c249a19a88d409e38950abd2387ed. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPF701702202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c547aae63e2f008377eac88f15246f585c75e9ddad09ec4f54a37023536f92. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPF701702201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924735b53f47b2348d615647e91273dbf15545463d0b219a601e3e3abd3d0e87. 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/JPF702002302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d2ccae3ac412972b9b5fe56a958b4b00064039c6327b3ed9e2863c69bb5765. 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/JPF702003501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b9629bef7401d9b85f9822371fc8e243c01050cb269c2b0d4645594395ad47. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JPF702003502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668e397c66ceba0b3470898ff362da8cebf0f0cfb3991c51e486c7ad71998b2f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPF702003503.