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 0xed6725624d4c3b2d4eedbe0a0d6a32a2ebaf31d478b5435ad1a81faec54b144d. 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/1680ce43-efc4-43ed-a7ea-0b9ab5ca8d46.json and https://artists.proofprofile.net/proofs/artist/1680ce43-efc4-43ed-a7ea-0b9ab5ca8d46.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 0xdb175233661b8e226a69c73286c33926d6015b8238dd6ec73364e8bc889543d5. 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/DECE72106282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e9f989b337b315ed9702c6a93b5aa37acfafa9a04558b6f861e4c0cd058143. 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/DECE72106283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c6069e1c156792bfb1575ff850f01b60f34d3ffe96ecb4f97f607ee2f1d113. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DECE72106288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2160fbe465fb861107434525f99d06894f602dd8071d85a0d9c174c218e6aef. 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/DECE72106292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99914e9012415276ce0bb4a9dea45015fc47523e544fef83437b15017ded335d. 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/DECE72106293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6373310048339f48ddac666469e60ba730319dad53c5b6590e61b1435271399. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEHY12301610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f156d84ce1a2adc8200cc6b39055b5c0007cc9dbb9c638beac47aaf096d463. 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/CH7812225327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2160fbe465fb861107434525f99d06894f602dd8071d85a0d9c174c218e6aef. 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/DECE72106292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c6069e1c156792bfb1575ff850f01b60f34d3ffe96ecb4f97f607ee2f1d113. 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/DECE72106288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04ca7b69c63cf3bb3931f93ccd4108ad56c97904aacc10f5eb909ab18d3cb40. 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/DECE72101750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8139924267ed58a31fc9f41d768dcec0b0fdea39e75a5d596a13cf764d7abc39. 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/DECE72101752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bc3e9fb1ebbd8774fcde4204cd0591c43c468e78934b1aa959821461b9fc6b. 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/DECE72101566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f67672260d7f1150fc63ae469d836d2c44ac65bbfb79f39867b127d798a26. 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/DECE72006385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16ed60699218f2029b648d4c49239d2e2d998a90225a958af8dfa2e852ee59a. 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/DECE72003242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8692914bc1b2eb11ef62e46e474ae682785e002fbd280c04863e8dd4ee4729d7. 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/DECE72001772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908dcbaa345db3ab2600930c8edc3d45c75771c52fe433d837a7fb6f53646e44. 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/DECE72000580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169e1fab292b2b880070345ad84b310d0b63ff28a4c103d1249bd5b7bc7337cd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DECE72000460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0608c74f67da202892807f3ee96df581bc8129a5d28c004676c5325f92a711. 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/CH7812410744.