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 0xf0bd102ee9225d2bce59eae0efb1a00718f4411553e383277215b558195789b6. 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/9f2b380b-b102-404d-9c82-912071db7b91.json and https://artists.proofprofile.net/proofs/artist/9f2b380b-b102-404d-9c82-912071db7b91.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 0x21f18b2a1be8b1d26c0aa01dcf4f1e73b3659dadae92ea75c176018f757b2f12. 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/DEXN82498188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69686011ca25668dfee26ab215f2e77e62c5bbd394ee0d77283a2e095b12bad1. 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/QM4TW2411817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2115f28fd686b62ff84598db74eb483e5d015a2f70cd26a73db75085b0d3328b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2510404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d8b284f793e9d6e0c23fe37f72a96f146fe682a8b2f9ccc6dd06048f078c5f. 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/NL3M12501781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2279faea197923526f549782c8f44ddd10e87ac0c2e24936194f7bc7feab33e. 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/NLRD52424631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc67c4a5e095d3a1f253802ab68151ffe14d708f73b74f54463a85e72665eba. 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/GX89G2581647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1944b53d3f176fb2b25184a42f1ef6b67846fcd09648da582ac151bc86a16042. 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/GXF972489013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e32245bd3455d305bd04be4269fb3e38b37778390c919e3175fe479b0d334a7. 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/GXBDT2462927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035a89d12eb822db12ff327e47a20cf71cd17e4e966a16b902bcea8e8832acfd. 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/DEXO42435291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bbaa3fd1465327b2955e00d160654a57b3edfc3af39c04365446efb3a29106. 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/FXR752411269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d7509eee62d80ebf1c500efe79db3ba4bb31ddc36af67d71778143f11d9c38. 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/GXBDT2404972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52fdcf218807a1132528dd627572a5df2e1360d30419f2149a6b3cd93f24833. 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/GXBDT2455758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b47565e4ce7a66c0534e93a9d35a84474fa3cf4e2cd8d18dbcab38fd536b4e. 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/GBLV62419921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f0249412d187e4a74aa2d037119e8c3189274cb94429cdba869e31855aa802. 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/DEXO42426355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e481cb5859b6a963f8741f2f275187b71b7dead112f187128a933a9a1f08a3. 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/GXBDT2403016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a2969160c7c1e4ffd12bac9b477d4bec5147538f3fc21037f5ae5c853c6c4. 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/GXBDT2487158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34809fa0f722bfa7d07d917659e6d02987fcd618cd742069cd12335468983af. 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/GX4R52407435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeb779e12a1aa189c77fe6f3466d658bf35110279a8203926d8b78449a1d983. 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/GX4R52442473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1cc219855582bd92b4b46fae26037b763748db66e2aeb243d1dc63e8fd97bf. 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/NLRD52419125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580677458da59af6d5aad7c7d87ca7613ea63fc4599a0a4f36c05b70a248851f. 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/GX3HH2427128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2af0ef59659da702c5bca4aee1f8b69d0e7834e0b862f4a19365c735166eec. 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/GX3HH2479629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562b637362ae823db75852f0222630b17011abd4e6221a3a29c27970133e2b8e. 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/QM24S2400498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406009cedea9691a027eb12c96e0f127f480e3ace152af4b5f09e08fd38b8710. 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/GBRKQ2207899.