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 0x79aeb11b37e3b7f91de1cb7f74e97f51dd1a9877e5723f6786ce71379769edec. 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/387aef71-37cd-4aff-95e0-e49b93938e63.json and https://artists.proofprofile.net/proofs/artist/387aef71-37cd-4aff-95e0-e49b93938e63.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 0x719cb84fa67b898994f3741ceeb619979af099d562c310636f052378fae10bca. 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/DEWW42300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14c738cbb47e81cb1c79d1204b1a735045f549d2751a1da67e4bbf59dc4d9d1. 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/DEWW42100377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4b4d6d0b05c30af41226d6031d75f8ced68f873739a9d435f417eb9a4c5a15. 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/DEWW42400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35574c31be118f3908b47579bce6cf58fe9caad18ecdc1c2bac56633600f7d66. 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/DEWW42400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242252889f18659faebaba999de1602cd0afe838c503e692988d5fe09bd33e3b. 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/DEWW42400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac87ba03903f6db0e92cf0ed0730e69d0b5d914b3a9041bbb34cb505fc4edc8. 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/DEWW42300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae72ebff810162fe9f215a4fc76237f1652a4a9ac92b09b5b63824603ceb44. 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/DEWW42300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86197844f1ddb58e0244113b7a31dc31b3341609b83ee6a6e8398c9659ad2a52. 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/DEWW42300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48be7017cbe7d9ab05b3efdcf1c03712a1c148fe9a0cbf78ea823b7eee69c99d. 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/DEWW42300074.
Anything For You (sunsets & sandals Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc18bd7967169f7579c3ec7ceeb8646a9ca86028c4508d44add6929d9144c4c. 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/DEWW42300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baf1ad81b774c98d2e8906e492adc3f177c8e5787c286eb24e87ac314146310. 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/DEWW42200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91afa72c5325372470c52e5f14cfb26ecd0dcd41765df730a256f1b81f025033. 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/DEWW42200084.
Falling For You (sunsets & sandals Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0f1fb1a5ade7e5150cf58973dd02ffb08c85203dd051c8d931742a4c1ec74. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEWW42200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5476e322483b9c0de15c8390ef5149f87ff3d96e4c6564144ebaf256c26b95e6. 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/DEWW42100407.
Without Your Love (sunsets & sandals Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b84add28e301cd8e4e4383f5fa8835e7744fe718584b1bdfe53a86fb390684. 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/DEWW42100372.