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 0x84d435343642ba80c06a4f472a1b2118f24066be2b75d07c84f01bbf4974473c. 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/22e8ec94-02e6-4252-851f-00fac520cc7a.json and https://artists.proofprofile.net/proofs/artist/22e8ec94-02e6-4252-851f-00fac520cc7a.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 0x0c2d130ab74eb442f54a581e54e7f2e3f71f4432fa439d066b58ec060e2d6a86. 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/TWUM72100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e14ac1ae29aa8c1346fe53197c17e9b5dc4b8ca55f1db78a2c2b240517f23d. 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/TWUM72100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a44b8e10332c4f5c70747c42050038ed7033f94238221021158495bf3dea6dc. 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/TWUM72100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a8f67f5be39853a377a4981059377a32ee8b0e5d78a309779c503487abfe1f. 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/TWUM72000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f732bf649f1bcc0810d656f7a3ff1e4bb9129144ff0af7e6f60a8a59f4f2f40. 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/TWUM72100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae4ebe5542361140a59cb9fb7139f5ae7cd569648c385a1ce65a855205cb9d7. 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/TWUM72100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8c7c14bbf9f24526e25449f574aa3bc05b7edf02945f95ee1e65c6a40a3dcc. 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/TWUM72400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf49d668ae00a70d8c08506fc4914b921dfa74a07d0ccf904a8dcfa44b71c98. 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/TWUM72400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a8f67f5be39853a377a4981059377a32ee8b0e5d78a309779c503487abfe1f. 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/TWUM72000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bc0865aaa45b6da799cc2b0e253394ac7a9efdc42d605c4d4c08fc64d95c7c. 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/QMFME2342984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ab30ee7afc8c4f8acae6fe8340f0550dd943a3aa2bda9195c2675deb364161. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:50:29Z), 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/QMFME2342986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80a54df5cfa370a45e967b630c25ac91b273be13302faf6f08f8ee0788981b9. 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/QMFME2342990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc07886435202380e4c8914a1f686442a2676c4678e1e8f6154d2878ba8ee878. 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/QMFME2342993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b01902112fa8d3f974ca5fb7942841818518e53e98b715319586f9a228c0ca. 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/QMFME2342994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc965e6035560c8f24c88da4cb24b79901f07dba66aac227d0b472ed14d7f906. 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/CA5KR1966388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae660546733c0aad95a734e05adc2bd32265949f9a1433e6518070d2fed2bdc. 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/SGA671412006.