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 0x64926e5980e37182723bea6da7ef4884651f150c3e5ae555dd7fabe7f3a1dc7c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbf03b05-3112-4b79-98e9-9d1120e55035.json and https://artists.proofprofile.net/proofs/artist/fbf03b05-3112-4b79-98e9-9d1120e55035.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 0x8cb556f97d8add187f11bd8357d1e3905d32f7bdd9f2243bca47a25220334294. 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/QZTB32370061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0109b0ddec9da905ddd655671679ed6a03ea3ea9da19f691d3cde25ca3e075d. 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/QZTB32370069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be66b59a2e7d62a2349eac70e864b3a01376b343f76b60df0befd219a13369b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB32370070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0fadb57cbf5aa345374da9bafb2e730cda5aceffde13a4f92c84a2f6b997d3. 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/QZTB32370072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8267d87eadbee76fedb74245c2c4d504e0c111ba90f840eb0cf09e5af9a22da1. 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/QZTB32370073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8842e917c1115f900b641ac742b9026dc1aa64d64379e15f2e5b229dde8737. 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/QZNWV2134468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd71651781ca3db0e97b9d1535bc8a9913016472faf24efe7c6a537ecebbd9d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2134469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5d55b4d18edd4f67898db6c64db7c24dd0061ac46151bc23118b58d4f75ae1. 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/QZFZ72177726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425b85877d0260f9c2930ea94b09f1001896f847fcf3fd3f79434fc415f207b8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ72177729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a249a7549f73ed192da5a4a0d32a5daa6af1b797bf55ce1647ad28387fcec74. 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/QZES52351831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18859ac158666e9dfdc14938ace3935ae1c06a3012d82a0c8a89b43f7506d77. 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/QZNWV2282003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04519b73b54695cba47d78cf42a518790e8d4d9795aa1e0a6546e274a94ff4fa. 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/QZK6N2026861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebd094b1848ecb71d5592bb2a8f81caef447cce31e382e837b5b1a0a1251322. 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/QZK6N2027026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa970194ef85b9fe91363075041af7554a2bef3a870685b6714cb93c934a122a0. 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/QZNMX2282578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680612e8b48cc0086f4af0f88d4161c6fcc40202b8943839ace9895d4fc70d8. 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/GBMA21813346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce3b024ddce6c3df7a151c65fb6a0ec77878d3c09f8d56279dd000e4b12a80d. 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/GBMA21813345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7576e37298a2d647ba438d28ac5f8980610826292b21ce644b182c5006591b. 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/GBMA21813348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1896191526973544b9c56a901577eece492575294f5ea07e763405b4683f691. 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/GBMA21813350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7fb517073c16f5e3599dd8a13f9ffe6dd37111971dc6cdc40bbfa903768ea0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA21813356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e08345732a395d78721a9af2e3563d6e2ef483c83a7d8ea223190114b63883. 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/GBLFP2454063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8121397c611a948653a7928d00fb39fe8b01b3ea8390cd67f593ebdb40a5d70. 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/GBLFP1849760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d7288e47556f8347d02a6aad2e0a3739c5a51085de880fb6ade030e732aeb4. 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/TCACW1767010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e55b6fd720b78532e0bd45dcaa37728ec106e4a06e4b3abcf66d13a1a4f6184. 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/TCACW1767014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8845a71153cc05abdd48226c7dc959138ca581c081676b3bb6a692f8b79286ed. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:00:23Z), 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/TCACW1767102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee4faa6676e27d18b3336b537993369399fedddb1f34fc91110d084a39c9e44. 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/TCACW1767104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78b7c42ed3c3e9039305f8c790062d39a389fb6580c33247e366583966908e4. 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/GBY711530190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a695c0e9491ab0d8b46def7c0f7b249c7a05d4721f025c5ea0426faf0a87f47. 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/GBLFP1579943.