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 0xfe73f715cbd991007ce338e4ba21d6d72d09e4a59f3a293c38c1f546e866806b. 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/251a85d0-80f0-491f-96d9-5beca10cd5e9.json and https://artists.proofprofile.net/proofs/artist/251a85d0-80f0-491f-96d9-5beca10cd5e9.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 0x7acbad400a3498c85e9d15172d6654bdf546b081253e723262cbdc677a4218b2. 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/QM4TX2457360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f45c63ac60feed96b9fa9c5aa7d5c84e95bbd863878797bfefa6f1e5f92a9c. 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/QMFMG2365715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f572cbf61140f87e1df9566cfc34fc90de89d4317db0a4793e198feb7437e52. 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/QM4TW2434285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8155d8e4f0ece7c8c673362cec032593e2d7006072548d1334d067129cd12a. 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/QM6N22479627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acbad400a3498c85e9d15172d6654bdf546b081253e723262cbdc677a4218b2. 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/QM4TX2457360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2398280f641551c4334a6b0ec6192fc254c094397f359ff87fb26d63a2d585. 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/QM6N22479642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0724d51b212799c9e1c98d50c65605d26412d2a37081acdf8cbc68e9e3e49ea. 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/QM6N22479646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa387a3f611df9f551173d3570791ffd6d60fb8111f768be6c9e643434012ccb7. 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/QM6N22479648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f1987106880a4757caa38ccaa28b53f4c5e465edad4c11cf0479294307253d. 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/QM6N22479651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421c64833953ca0f0570e812c3fb943b0f1f17739abd57a06aac8c5f45afe46b. 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/QM6N22479671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811a4c26c618fe18aa7399b08f938c7cf395236099d1815ae540ecc327ca3db3. 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/QM6N22480449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ed5523c3a607b836977be1a81d74f5ae41e771795374037c5d82678b4157b8. 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/QM6N22480450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0137e0066e32258347045febf9a197aabd474c11c0d1b8c51a3fc444df6b3e. 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/QM6N22480452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb425124e29aacfaf2d6f70be34de75de707011b9f8c19374a1f67064376ef2. 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/QM6N22480453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b4936f71776b482f33009e2010854717158f428e0a8fcd7657852af9fe9b17. 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/QM6N22480479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd9caab7fb1cd2988a77ceb834a6d7e191d2f4517715dcdbc4d0d1d11b536bb. 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/QM6N22480489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa925845e243bec8f4db62a2370db4783ac61f7229e38c54efbefe27c88e7e410. 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/QM6N22480492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddea3ce0bffeeea8b3cfb38956128d47a30ef4f7403c0cc6b4573e7e03d7822. 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/QMFME2350543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb143c2cb4bedfcd0ba1ed827d428a790afe76faa10a555439c8721997f14be5e. 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/FRX282531133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd498ba82ab00f73d37c4d48443653c612b3a854e152b1526717a6ea15b09fa71. 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/QM7282548086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98cd5c137c70565a990a2eef6e94fa78a6461d00258b89e3b87ad900ad1e0a5. 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/GBKPL2176634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d17d0b4391972fd73ab36fcd03e873444674defbb07fac006b816b61c824b3. 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/GBLLT2142928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf559fec394f8294afdad0a44b7a1dcdbc0bf8c6ca46f88ad72c427eecae30cd8. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QMDA62318443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e78331460e85cffeb926b2c5d7876ba96eb7e5c3eb50b09163c57110f5066. 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/QZWFG2329522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79211d4ae962b31158b5f2f09db3019f66d712295afcc89d8f6951624ce98ef4. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM24S1846951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe272dd9efcb109c68fac4e6119c06cc5934d99920af4c1ad573a667e5c03d13b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM24S1846959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3afc582f68527e5c0eb6ce3d55d8d2c0864a7c6a0d838b51126e6ec2505a896. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM24S1846973.