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 0xe2d186dde17658ed51865b992682983cf235c2b27e5b647170de93fb585bba94. 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/02e11561-389e-48dd-9c72-9350530d4f92.json and https://artists.proofprofile.net/proofs/artist/02e11561-389e-48dd-9c72-9350530d4f92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mendelssohn Lieder ohne Worte (Songs without Words), Book 1, Op. 19b No. 1 in E Major, Op.19-1
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 0x663b05c4d076534500065540d9cffa1f59663e0a02c3bbba8fbbc4579757826c. 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/UK6821713858.
Chopin 24 Preludes, Op. 28 No. 6 in B Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b40e620bc3e7dfc487392e3f9dd6412689bf94490386b03f8166313f2b27aa. 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/UK6821713839.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f606f2228deda2bbdf1b55a196ab07bd176dd170796a37e6924c05d19dffa15. 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/DE1JN2457139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297cb8c75ecdb9af859194322238c9a609b382679f9d2b4bbb0f263745cb16a8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DE1JN2457260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa0e93374de4a618597e051f3003020ec9b25689407b6e754fff7deb14feed2. 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/DE1JN2457488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e0bb1a1b664dbce48d0722688e730a5fdc1c30d2e5738018516ce255a2b1d7. 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/DE1JN2457166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a1f8ee6a31c64beabca5e002219e47e4b6d8f22fb4c772cc1411c99e2c241c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DE1JN2457180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5da16337fc7f9a986ff010bcadc474b535e042bd01dc21ff755ffde967d713. 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/DE1JN2457186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec057068de391bd887bfaaf3657beecc318b474e13eb7ca1bc565e7f8a714f20. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DE1JN2457354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e10f3e7a7f9da680a57730d2c545b095f1a2823be3e293fbdf377bc71fc38e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DE1JN2457161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f7bf8ad0920cb60688bb53d7bb1bbd4cb41b253dc95d458a472d2212d16936. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DE1JN2457108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92e45d7b6e858736d1b80016e8599ae98bbb8e982af50ef3feb7e224d97a33e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DE1JN2457599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfa7d9240c965a060fa681c12f31762578c2631a024d4f62fcc2a8d9f0555ab. 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/DE1JN2457319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaedd3e59eae262f0b22d6ec10a2c4a2620e64151352defe87369750fbd9f862. 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/DE1JN2457118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8089b43e0dc853b05647af046ebcb582ce9b009585b614b4d99dd94d36ff510. 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/DE1JN2457481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fe71674a6bc10de4119b5505202dc1787c143d80ba49967d7fdc366cf469f8. 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/DE1JN2457122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950e030579a894f8e9804bcb10d3dfc1972db7e950c5ab3a384bb3cc13ce1773. 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/DE1JN2457400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497797f929ebd38c107bd436e10fe2590ff8d6807e57a65aa8446e0d51339036. 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/DE1JN2457151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0b807be2207509deec6ce7fd5ade56bab4c63d4fc51f3e41514a6dd7509624. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:29:01Z), 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/DE1JN2457126.
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 0x510e1ed4524371e62b692581eef7cf2e7e97e76b453dc04015dad131ee4be70c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DE1JN2457192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd14e15c81568c9ecb3c86eec2f40ac87f66ced3eba9b333b69329c1b959737d. 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/DE1JN2457168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86374be3528354e8e8fc8fd79fc01625fbeca29041047a0399bbce3efb0e6fdb. 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/DE1JN2457261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ba952e385a74c0af422c76c7e6744ae3197391f07bdda55c1a2ba74ade4b6b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DE1JN2457153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536b490dd25c092a206e0ffdc11309ffa32152904ddc7e318bc6707c8f2b617b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DE1JN2457147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b1049dfff8db027d745ae29d5577dba1d8267a8f49a949b939e292f35aa02. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DE1JN2457201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9c80c279e2068ef4e3d55be1a9ce394f0e306f5e52b0fc7de962fc38fb5066. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DE1JN2457145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320f8d5ad85c4df003917cb191279ea9e254af90e2bcb5bc39d5f2f848d8c6b9. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DE1JN2457202.
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