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 0x68561f7ad8f33a451dc1ac6b8228518e1b23957d79556903afee145a4a38f0ea. 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/8316a0ee-d853-4322-ba49-f71499c38daa.json and https://artists.proofprofile.net/proofs/artist/8316a0ee-d853-4322-ba49-f71499c38daa.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 0xd325f3384fafe6ee25ca1ecb11ee50dc6a130faa17f490a508cd35ee656144e4. 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/SEVSZ2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b0b6f0606eae9a51c8384496148321d738d1b98d93e3f8b456c1b3c5214d05. 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/SEVSZ2300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d248018b5c3f609cba6e5db33e17857040a927dc134255411769b3f8c0a97f6. 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/SEVSZ2401603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26edf205af52739763a63d076a80f88c0772d0227a668c536d9f1b9526c14eb7. 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/SEVSZ2401604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d0d01f729a0eab937dd11af5a3d99425585db5a856dbe12b5fc7538b3e532d. 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/SEVSZ2401605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad341d80ac85a815c6f545bd3d2e9d22f997b0bf862c7030de29b74732f2f24. 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/SEVSZ2100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826c69b3f02e19db02114a5d21439640dd2e469bed16411af7dabd19513d915d. 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/SEVSZ2401606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d1ef510a7e444defc8efbebef9c05010757bac8ec75bebcff1353a48dc26d4. 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/SEVSZ2401607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6d291b42940bf167c6a0b26256d4276eefc3a9413722fdacd2361cb1c2a1ae. 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/SEVSZ2401602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297686489e5c5aab3cff857de8c211ce1ce5b460510c1b5c57e9a51fcb8a431b. 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/SEVSZ2300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f2a1c2fc9b053d11b08a2e22402a5f16dcb850b7c975d66fd1a80a6071f632. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SEVSZ1801902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f747ee2f45b22c97e78720fb188a91a4c3e20154f996657e4c9dba080e9eb7. 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/SEVSZ1801901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd277185e7436a3365fc83c4dfb386b5fb75920f3d316a0252e8f89d87dab335b. 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/SEVSZ1603701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf406fbdf4e54f470d4239de0908c4c70340f1e78eba5aaa3624f08d86476d43d. 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/SEVSZ1801904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb074c3478a0a352b5726d5205c580898e3302defad62498fec0530f51cc110c. 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/SEVSZ1801201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d248018b5c3f609cba6e5db33e17857040a927dc134255411769b3f8c0a97f6. 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/SEVSZ2401603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6d291b42940bf167c6a0b26256d4276eefc3a9413722fdacd2361cb1c2a1ae. 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/SEVSZ2401602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297686489e5c5aab3cff857de8c211ce1ce5b460510c1b5c57e9a51fcb8a431b. 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/SEVSZ2300604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd325f3384fafe6ee25ca1ecb11ee50dc6a130faa17f490a508cd35ee656144e4. 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/SEVSZ2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad341d80ac85a815c6f545bd3d2e9d22f997b0bf862c7030de29b74732f2f24. 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/SEVSZ2100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fbf0dde838c746e6329f462c1471ea1acbe262b01e45400eb3307a7951d30f. 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/SEVSZ2100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c8c04630127a30ad1e4fc9a47c180e52649a70ec54fd69527d1d4d71e86e7a. 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/SEVSZ2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f667dcb079860626080e15de9c2503b6b33611e1f4f6bd4ce9cfeade81a7699. 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/SEVSZ2100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95e0fa379c286ac369f51235d79e0f4420d2fc4b53ac7cd148f65ccf24c36fe. 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/SEVSZ2001003.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137aa3f58673cdd87578039155abbe5a919cbb940bc6fe57ccdff8331b0cf986. 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/SEVSZ2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb94cf7c5c7ff810799358f88a6cd3a39803da456f9fa4076356c7fa7f9f1ce7. 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/SEVSZ2001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438c2b044395940fd865c77c7be2cdb1f41f3c8754995220fb071a652ae9cc69. 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/SEVSZ1602403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0472e2e506f0f1ef9dbc352456a3e94182f07a830bc42db16894419d871e717. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:37Z), 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/SE3LB1200102.