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 0x5e19b11d0661b867f161cb59eaf9086c389765ab6dbb987514cdabf40fdc7d47. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7481c9c8-53a5-4442-bdf2-2afb95f6289c.json and https://artists.proofprofile.net/proofs/artist/7481c9c8-53a5-4442-bdf2-2afb95f6289c.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 0x92b62e0ced7cbd2676c3bb2d5135fb78b7ddde64d4eaad7a3c58d550494c431e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA062275445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe700f68b5ef2a9a0dfed60b3b6208d03085a1d11e58d305b0d8c7537ec5c304d. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DGA092335783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25335bdac995f86bf0c89ff6e5146fe46fc1fb5733bcb12d83809a9fba943c81. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DGA0P2358418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1286b1345bc695024593e6aaf73f03c60d08facfdb2c9058a0f6b6fdc5a2ad1c. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/DGA0H2357911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4174dde475d090e8eb4ee4fde63ffa1971283b26d54f478e1c67d863485a3ff1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DGA052351434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8465c41a1ec143ca3b25ea619e808ac49c9932b834b58d50a5b09673b95f4b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DGA062233325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be2207eac1259214d8b403dab9905ba8cb5b1db80326a208d45e652a29afc74. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FR10S2481892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712255868303dcc57139097f74b9baa2c71d9c4b0104caf1a3febda6e3c0bd0d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DGA0Q2391165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd8640d867dbabd273535c80edc04f25a59030b954cb24d2b62e1ec650cfa4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DGA082334745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67bb6caa8d7cbced57957d7cbe5f076dbc4e6f265e81f1950cab66aa387d62. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRX202322079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5019ff0e26b49b2e8d696fd45195c5cc431670f8f6185ac942bbbd9b31c2d5ab. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR96X2291208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec3e7a3df14cabd085a6bb17b10a16c0c54962749456f2033f1192fde555e2d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0H2357910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed107c932d6eaabc776efe68acad66f8b4ae527751a51e94ba2c75e6847ef95. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0M2335125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4d0be62d8d913f1077ac1b84de15020f6dbc7a30610b1c88b4c944e913e949. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0L2326269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f3c63b01ca0be764e5311826a2f865f7a255464ad3d80c069cf4270e1fee10. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA092368691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6caf52cacd4be7efe97f616e0488e9c6e6a3e2a0c2c09d5b10f40375eea830. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DGA082368992.