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 0x274ddc7ecddd37b4944f3120da12ad2b4947419db292c1c9e788d572a67fefee. 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/0a297888-9f19-4279-bd03-d4c5d0ed2160.json and https://artists.proofprofile.net/proofs/artist/0a297888-9f19-4279-bd03-d4c5d0ed2160.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 0xf24943b7f32d472aac8069bf01c12bb9f703e78c18bfe70e7c6fbd55b2d4e9d3. 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/QMANG2236902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e70482915ad0429edcbf1ebaae16dfdafdedddf9fc373019c8e26d87a774f3. 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/QM3DF2277154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13b819167409592ea5ab870ef6fe1fe024e1e2da63f82b4d799fe829815725. 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/QM3DF2260326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3100106ad203286cb71d6fe05943a2d8854c9757154a1bc9a003a451b1d70b2. 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/QM3DF2277157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11acec581ee23fa86af50a4b899e799629c4a30074d184d7f3521744aa9d8488. 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/QM3DF2272632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1df8ae6d53dde9225f511e24d723303c62d1effabed6c931f0007cb2705eb. 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/QM3DF2277153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78204bf9145d9e4bba4674b65dbfcf6791d5867d2c054103b79d6a07f498011a. 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/QM3DF2277155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc483eedfa144019f643ea8939dd98d7c18cb56e5f723036a348cf69586c22444. 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/QM3DF2277164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d5c9303e7b37a2bf951c7961decfe3af4453bd17e9e9f65468955665b57236. 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/QM3DF2277152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730adf7d8702f73c3c23a8a65a64cbcd6b067d4e5e6d2a39f781635945e01807. 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/QM3DF2309854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01cf9a2c333627f5e8a49e08f90b0311c9aa61d329c2ed3a1557ce6cb148b6. 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/QMANG2209337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50928020b3f02164c41e09c3aa8e6ad5a32c771fd671d380be9b669772fb197. 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/QMANG2212171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4c18fd6b2a151ad35fc9ec18bdd3a9a206f6500dc875246ab779dfdd8a3c3c. 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/QMANG2208822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11acec581ee23fa86af50a4b899e799629c4a30074d184d7f3521744aa9d8488. 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/QM3DF2272632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0789de04213cbbc58a664e6ec496c2c40be46f6407ee8a61cec5f088f28b72d. 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/QMANG2243544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13b819167409592ea5ab870ef6fe1fe024e1e2da63f82b4d799fe829815725. 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/QM3DF2260326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f063618c175e8dec613f42f3b6f452c42b97d715efd407de713ec327e99ff19. 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/QZES92381333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa368f20e0f401f09f6b4ecfdc46185e236196aeb02c9fa002bc6f8b11fbb96. 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/QZES52338687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdcd244b7c2cc4412429a7cc6d16d3ece59357c4c3fd27498f8ff57f59611f8. 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/QZDA52338740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea63d9708fe23cc289013df850df7dcd115750fe209161d73bf727152efdbe0. 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/QZFYZ2344088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7bb972b20c88ef4df41c4632aaa1dc3c7661db44e723cbe38ba2f81d54c9f1. 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/QZTB52238460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdc8b60903b3794e17fbad5a05d0a8b6097cfb8edf86dcf734694e1790f0033. 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/QZTAT2227303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0930525fff4a24dc716fb40ec74ec69c531d86998b349de60064f53aa01a73. 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/QZMEM2287408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9af6019d84c00dd79dbaf4b5a823e4afacb37b1b4f80d95d4abd08b32aab3f1. 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/QZFZ32288268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9662b56190e685bddbf172fc33388f27ee12a9d3214150934ccd04fd89657dee. 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/QZTAS2173642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de3d6b530e6399b561f4f74b477b9849947434622cea6a03575bca520ccf2e7. 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/QZNWZ2196026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327d31b1643075169ecf440af7ba2a6a46a5fccfc0cf4d3a8becfeb3ef21267a. 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/QZHN52179199.