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 0xa5eb1beff49c43fad6599a53a03d9758ece4bbb22f23a89fb7e73bbf3c6020e8. 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/0702d8eb-718b-45d6-8bb8-300b54a20a46.json and https://artists.proofprofile.net/proofs/artist/0702d8eb-718b-45d6-8bb8-300b54a20a46.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 0xf9c05b6ffc6a768e2eb0a9025fb250162a64b99312a50273240dd577dc8a6d66. 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/HUA611601460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb478f939e76de241b94c853abbb0e5a4310561e16892331e029c87aa43a00b0. 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/HUA611601461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741651e0b9c533dd2618a6736a41a06fe5e1617990340b11c5f111b0d31ebbd0. 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/HUA611601462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c8c0e3f9c7e58e6919110250b76f1655f20c9d95d063fed24c6fa373d87e88. 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/HUA611601463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb35f02f71768050aeccc53edf1854dca6b2e8c96b8582a2a9cbcf3192b6a130. 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/HUA611601464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6badc770937d52ff1adca467c667bb7767dfef895cbed6cd0bd42a5660097f83. 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/HUA611601465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491474d6b893bf3957249703961d2dc5e4232a8ab4febbe9108587474c3f08a0. 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/HUA611601466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e538b4fe85a324d391b0cc29135a5d5658e859009a2c53bb83f4b9258ce5dd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUA611601467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f680ea8ff7622b7ffbb423a99e7dc35e5b176c5966a768e333fb17f0eca11d. 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/HUA611601468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3d38cbae3b464799eab4f87f55d833098eb6153cc826806ba92490906371ad. 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/HUA611601469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95b46da74208bcc3fce8767c48e346b71c6824bc4aa88ac1e2ad7c140fdea92. 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/HUA611601470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14be0e6f6de762d084a9701bc21c6a45d09a0cc89d508cc176c36b2a1713bf6. 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/HUA611601471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6067e9a94b6c602d9ba94601bd87f2c5d716b0a05d30bf3948c3462467f757c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUA1D1699803.
Most úgy szeress - Peat Jr. & Fernando Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a154a568f9a05544f381553dfce17664608107b19922fc0f2db0ec3170bce2d. 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/HUA1D1699804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2739929f302bd89ec2d79a51bda9b8559f0c9d5712ef025a8fc1df6a25b2ece4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HUA1D1699805.
100 Évet Várnék (Dr Skull x Denoiser Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3a99dfc9667a5f54ff4abffe47693bc88b5efe23082455a3c4eb23c504663e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/HUA5Q2200062.
100 Évet Várnék (Dr Skull x Denoiser Remix Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6b9b7e41e9759f50eea656280fc12c529726c31905c6b4a459278793d70e6a. 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/HUA5Q2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad36751be74433cc33f669bc9e8c67ff06d65ea9351216e438c7c57b22be3b61. 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/HUB291201291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16fdaa55acff69c8b1e20622aff958f717d12236a5c06f0fe5623a8dcb4514. 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/HUB291201294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc1485bb6d78c1000b8734642aca71b8c13f12c265db10f0dee9cf1bad98234. 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/HUB291201293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29c16b04289badd195b15dfa6b7f25e6d2a846d1e8594929acb95ea4a276412. 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/HUB291201292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b425cc7a4680ac73233e8330e0715c09595179e49390fc0bf387af5eaa3ee41. 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/HUB291201421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bc2616aa44d03b524938b893ced28226f74c08bd0a573743f4c46f8c5eaaa7. 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/HUB291201422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10de41ccf34dd7c3110e6fa4c5cfc32f9afcf8959953ca9a63d93d738932a53f. 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/HUA5Q1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce997d7e0dc5bd3afceb35c43afa24d1ee60abad397cd5b434d1d9dcc9c96bdd. 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/HUA5Q1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fedd9c30a5c89da1c40cc5d32169a696103ca3e3b491f9586d48e98c176cd3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUA5Q1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa959818aaebe9cc9f2158e78e07ab56dbfa4abbf13214fff25e76b83e5931ed7. 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/HUA5Q1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c5d2f2bed3fd9514d9a87ad6ac62d6c582689ca7796a68908d0e4224821f02. 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/HUA5Q1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2927cb0de0d18b742c4b2694c210f35c1cda802ebbe61b25884ecf3b6e96a78. 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/HUA5Q2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09606598c51dbd6e586356827a124fd72c10889293c8191509bbc22adb1c27f9. 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/HUA5Q1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0dc32ca888c6f27ccb15b720224508555da9540626eba3147397a6ff95bd00. 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/HUA5Q1800024.