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 0xcf249e540097ff6d430bda4474ce4d8dec6c7be83cb43f45772a3e15da4041a1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d41b0400-9583-4ef3-87dc-1bbd4de8325b.json and https://artists.proofprofile.net/proofs/artist/d41b0400-9583-4ef3-87dc-1bbd4de8325b.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 0x2d5f2d0b0988f412a9654f31b00206234bb06102ade4bc309674515c440587a9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLRD52340461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696c8512afa75bc445cc76d37a5b9b7cf29bdc2cd216e1ed0332be86f42b4359. 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/FR96X2246565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed6b5546aa638988d95fe97bd68c5ab657190c16af6d62d7a2d8cd79b8cc47d. 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/DGA072113200.
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 0xace7816c6f35d0b2634615c438ad7ab2c3dc1faca78194a0199e6122ae6a05fd. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QM6N22487791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f572cbf61140f87e1df9566cfc34fc90de89d4317db0a4793e198feb7437e52. 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/QM4TW2434285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f56d6fc03c1c1113ee3b15cec109aa768d06474b7e2795a5ae3def37e81c721. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/INUM72303146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173a7a023362a22c7ddd12be305191e15003974781609bf350c834f2cc755037. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NLRD52340463.
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 0x789c53a87af8d665e8278c42f57b0c260024df57b3959b37f73d2478b875e4fb. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA062350032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c289ff7ae077caed93615ec1b8d147fe143ef76930ce3970c80b5adea6df54. 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/INW262200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34a5f68bc43bf700ec4d2cd812d4fff0e13718d82791c2c36607df88c13ed6b. 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/USHM82213216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b74c06a11066d1ee9d0a04bac80e334f81a0d8ec82709fc3f6a54c88214e2b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX202273176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf789a6a83c29996d41873305978da1f9889bcb50ab7941a88a01c89d6df50968. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM6MZ2227516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6498ec7be0a6a6adb8ae0c2ca844a5e22eef2a4fac9e1f298366fd76dfb65fa8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USCGJ2171907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef512080cd3defd687935d2271d17bd0c85c51702f7195fb92d74a2eb4eb2d0a. 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/QZFYW2199272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5499d5d7b6f8a5cac44655cc30b6d651c659ad5264082336540533933101d3. 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/QM7282548071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f5ca4a673fb789123997d6185074662ce59c97a9f6c0d1a396a38504962d56. 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/QM6N22566048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27f30ef0490cf5c9ec36b985d7bd7a2836baf79db44bce9217870c0f98ed505. 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/QM7282548080.
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 0xae6b1a0a1f7edc0acb1c5efdfc6248e311b77770737804b10afe3dab46dd1b88. 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/QM7282548087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8476ba990c6a00430bc3eb5f26c407f46fd161e0b9893a7cb7e51f70f982f6a. 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/QM7282548094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6312ed2a38fcda542e69888e873250e146d6f76db258f746dfc737ea63e160df. 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/QM7282548095.