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 0xe3edd570aadfd24e07016cc733ef241478fafe39f508e499e9b5d0f085abf9ae. 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/0ff448b5-dbbb-4c06-9377-a08cea4629c2.json and https://artists.proofprofile.net/proofs/artist/0ff448b5-dbbb-4c06-9377-a08cea4629c2.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 0x41083fa42d295d578da94ebbf2890d951692aea25a6ea7d036a94b4a244516b5. 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/GBWUL2409105.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07a935c95ea1e91f1ec11dc3613f0f13fbe0c7c592c9fe89244c9ef18d196f4. 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/QZWDE2324447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dbcd1902d02c9528ea579bd58422876f9bf333085be9ba6debc471544a6e74. 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/QZTRX2372892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe857928356eb8e5878799b32acdeb01881745f88a9eeeb5cbb3935d975b003be. 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/UST8K1620869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bfb394b145c73a6bccc43a3891171d63bb48b64d3fb759fb5863a92b3d2107. 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/TCACM1634114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bd654d813c16f3d35ff249a1ea5cda2e89d1885f0c7cb356b628a7c7f8bcd7. 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/TCACM1634122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1ec6ec658f3411e4bcacaa9c4f216ec61c0701468e7f620bd882893f8b03b4. 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/TCACM1634491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f72f3f9ee5facba3aded59b8f65d88abd91252f1f52e487dcd64d5b4e440f0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCACM1634511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fbbf1d110b4cec9e96e3f8e7768e4fce7556be66759f6bba965ae44eb5923d. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/TCACM1634542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ac673b7c23e30987fba5f82deefe7f6157337f0960e2d29dcedd2f3df44729. 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/TCACM1634573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f1aba2a4302f8959846711283dfe0755e4b3f9f1f1487daeb7cb8518ba01a7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCACM1634584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c0891ddece055832aeca8d690c7be76791314d16f1b6d4158b072159d714a7. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCACM1634585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b963852e3c400bc062b20cffe94f164c300868e4cc83cec0da6fb62a32522cf. 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/TCACM1634637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672a1c0714725a3434aeb2caa36d1b3e24dad2adecea2ead7aac77585ff4cbcd. 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/TCACM1634656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0902d01b8f892b77960311a293eb953920e8d366cd27553e413ac9cff7a1e6. 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/TCACM1634678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c83b1662c29936c7c7f0ee2951cd7c4bce8765f5f96f17946a8a1efa6e3143. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCACM1634681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14c1f913c16901fa52935bdc3b5509bec781fb9b55d7f9225dec2d5e329df6. 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/TCACM1634694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6745229c3bbda718157f29ece83bc3cd6f42f6dcec763e0f7227f35d5da835. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/USL4Q2191249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63db270f9cc9844da33091535c2c1ee2003108c128ba1e47888a372158f7d25b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USL4Q2191250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0ca9821d8a8a5e75cb88993c913ab11128356f1327700080575c3bd0d7e176. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USL4Q2191251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6740feaf6d0bdfa80aa04cf5e5d4ad4c0ceb941aa6b84e67869f2c84b6e8e46. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USL4Q2191252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1803f8394e0edc3b94f40bdf50d4a770ba10448b5055f3a207089171bb3fef1. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USL4Q2191253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5fb7941d799f4bb954b6ca197a71b616326d8dc1a2f7de54811b7cda3500d1. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USL4Q2191254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70945eae9799e432b046f4796f89de92569fe436e63d38a8fd55e9935ec31c22. 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/USL4Q2191255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5630bf86b373755e726b28089183fe54bde2c2838d72c34456c2734a507cd126. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q2191257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20211d74cb2817e9d946d4f391ce027c144cad14df8d0d86d4b864a5c6d098c7. 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/USL4Q2191258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa846cd31d763074255fe0a7903a6146c3701600b254075737b48aa87a89b28d3. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/USL4Q2191260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63591cb4d1def83c9d07c0c8ae239b05a8228d18ac7be860f6a6f70b9eb645bc. 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/GBWUL2119995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aed75a3fdd57ae8fcb87c9941bd7dfac571e75cbf4249234750660135a2ed24. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USHM91803448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469224d80a4e16b134101567b03c017816e2311c0b4de3783f1067bf0516eabd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM91803449.