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 0x2e7d6e7ffe3dba9569fae18be5e33bfd2ae96200e1811d45a7fd8ab030c48dfb. 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/c3a68f37-7bd4-4ef9-8676-6522615e5c0d.json and https://artists.proofprofile.net/proofs/artist/c3a68f37-7bd4-4ef9-8676-6522615e5c0d.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 0x836d7eecdd8261b9a391d0dcb63390fc3bc47d084efff2bfe16e10ac47681bf0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM4TW1679004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3aceee27f6e7155519801e9356c2218bf2c599aa61333f6c82f267f855c72f. 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/QMFMG1492405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845888da388c3869a32b8b1485c870aa9cbce1fa2705faac0300c465da8b98e9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QMFMG1492417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc409a0b8c6164d42ec52e98b876a59d2d3bee2bcd2b94e27cc30f090a5c345f2. 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/PT6IV2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d816ad5ace7c7d9aa7ba435f983da794e8610017a733eaa848696d6b30aea7e. 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/QM4TW1679029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfb0b8e850e36c19a2bec40c8fe1e378077b21b7b1b451a6c732d49bd0e4bce. 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/QM4TW1679030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2054d6c166e945c5c09c0ec0fa12a837382470eef9322e64a8dc16fcc1d0cf2f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:05:05Z), 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/QM4TW1679032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa079f9531356d0909b3c1bea7a5fc76de98c225d00d4154538f3dc37efcb146. 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/QMBZ91653142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba67b21076c8de847400283935d2533fb5b36193dd1584369f40c860458ce447. 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/QMBZ91659154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60fa6a740f5ce5121a2ea34f9c271ef9408b20d41d9700cf292498cf356fae2. 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/PT6IV2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3732c1aa0cee074fd0851e001b063814f520298f4f9678c8c7f9283c5cb0650f. 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/PT6IV2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf71a69e57a4b31e57454195e4fe92ad2f0bc7460a434c497ca0c0353f8563e. 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/PT6IV2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59cc9989e316b13296519d5ffa622e2d117389ba3e9ef4d1dd4aa9ea8028c2d. 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/BEEG62101512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1dabc0b4b1ed9fe29928dc3847fdbb8fe95fa9117a776070c02c62de9d294b. 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/QM6MZ1836821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70639759972f7edc761bf974c78c2b4f5ccbd77ea6b5ea4f67f854a240d55c2f. 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/QM4TW2399891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4227dcd682f90f946ccc11d73d09c352af71d58247345db0113a3047ab64f4. 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/QM4TW1679014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054f4aa6e38a08dc550efc65f96db67b995344e6eeba39d02fb8ed5c0d19da54. 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/QM4TW1679015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfca4ca8ed93dfca6ed1c0ad7280a3d887e2a74de0a66a7c2a784fa84d5530a. 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/QM4TW1679026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a4b505456810044ccc0bad43e08d29e3f08f6d213cb6fd351224c8e6c6339a. 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/GBSMU6434262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea74363d7a7400883deb18e2c14762525bec86bd1f1c346c62c9b39c12c7b5. 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/GBSMU6434263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951741f044b586c7911ff61d80bd993542765ffc94af5728570bdd01eb6d119d. 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/GBSMU6434269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a6ab8194e9dafaa9539007177772fa742b607a2b04578dda786eba88cca56d. 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/GBSMU6434271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3769b38487f554edf7baf9ef024cd9a756d8f239a38e32b862172a3df6bf144c. 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/ES71G2312549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5646611c57ff03d8efbccc964d7f674081a3fb59efb86653e49d972b9347b592. 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/ES71G2314332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc384ceaeb93c06966c16881fba1fab5beec4dd3620bc0783f9fa78f589b586f. 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/ES71G2312548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c98f72f18147bc449493cb868f4f0f5f25ffb764caba98fa6532dd4d0d3f3b. 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/ES71G2314338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93512da5864f6ff714f7ccc6ac493dd5f9e57d42279693e52ffc07a6f363bf92. 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/USCGJ1919169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3518e587140602b38d47a4eee5d1ebf1abf3bd75c08ebdf68d2a5b55dfd93b86. 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/USCGJ1936376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2330e919bba7050a6e206a112645ab063c1d05839b8bd232375f3700d093af3e. 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/USCGJ1936380.