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 0x7f0b5f5ecb9679ca13712feaa5b880b89b0514411b7db8439da20a65040f67ee. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f94e7654-3cb1-427e-921e-16b0c606dcbd.json and https://artists.proofprofile.net/proofs/artist/f94e7654-3cb1-427e-921e-16b0c606dcbd.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 0x6beb63069338f4d7c9c785ec951fd5bbd380586de54274642cb35e8a46bac013. 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/UYB282311006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4ae10c2277a3ca50f3ee6d85a224f3264f8c8e7ae0c46b89c891597cc424bc. 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/UYB282311008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde663b47be486073efcd5d984dcb701023211d3e7c1b40ff1ca172557c5b8dfb. 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/QM4TX2086721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cfffc03bfbe2e51a1ba294f42f2b0b67fb280634d147a03e0b865b2ff713ff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM4TW2022173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03a3b679fc2dd2e41560f7431e485e7118fae01ac2de54510d8da9ce0dc8a0b. 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/AR6SV2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616263cf5b2ad7e8b05a4d7b40882e7ca52df42951bf40ad2c446615aac0cbd0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM7282094713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23887b2c033e14e4e7a1fea5c4e9dbfddd2c1a531bd4976de4b7817dc3965e1e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMDA61810886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db0548fbf3f2c96b073bd720166f24dec125285f14bb4ef574135ea8d5ad89. 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/QMDA61810887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e140ae2c8d58ab67ff9abf533a417fd60a3772d470fe8ec925cd81460c261ff. 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/QMDA61810888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e6d034bca786d857cfe9960b43800ba7e197d36fe5f7c3a8594c80063b1093. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QMDA61810889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80771860638af7375ea1a835d6c557647a17963aa0e5fe4bf13c6843ee00decd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMDA61810890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498922ece848f36f47809797e70136395bd94f84f4373878d1bc8a1153222e8. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QMDA61810891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3684c680e1735806b5441c23750646ec46daf1bd6bdb7986e5eb0910d73aa6cd. 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/QMDA61810892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a54c678f3427ba48879d862aa9031a2de0ae997e8814884701c26c91ed5d4e4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA61810893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdd0c419dde9f8d76e0ab7e040676d10a5b31dc74fa4eac7f1a3ceec46c91b3. 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/QMDA61810894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45541d933ad0ffa202f2f4c3d9deb824a3a1e78cd38c3c071df9366a4c4267f1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA61810895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cda7eb7b50ae378cbf4dd0b3875085c9d28914e6e76be8eea1ac5acb692909. 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/QMDA61810896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de5af1fe404cd909220408b27b8be72fafa630aded789dfc7d728c67e3a6ee4. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QMDA61810897.