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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce302ce60b40db27261f60ad299e34a595d702ce2ac0ada1a51be9998502da55. 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/20a18f0d-bb2d-4570-8470-78f8cac0ea41.json and https://artists.proofprofile.net/proofs/artist/20a18f0d-bb2d-4570-8470-78f8cac0ea41.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a5f3a085c3f408cc84ce0b2f34ab03baf57bb02ce7da2d65b09fcf3a0260fe. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:38Z), 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/DEHK92104591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf19503e8731b003120b5527deb61cbef44b3da2e68cd016252ab5a6a5b0c66. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEHK92104633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a4eb1f6a878365e16e6669ec1857f23cd8589caaabdd9214658e8e1db34150. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEHK92107776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144fbecf9d17f7b05323e2b75d5dd0f678b7527a13bbdb13e2a05b35b342cd48. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:45Z), 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/USZXT2453672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303b7505071fdda70cef8106d7e1d82fb61c7207864407e0988ba941b2e0fb91. 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/USZXT2453839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce479478fdbb3ad2b614e773f215bd9573b4cbd41335f4a6c6dca60010c4d308. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:31:25Z), 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/USZXT2454142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bfff761439e319821ba4bfe6552015a84660e09610f68899d90a53dc07a9ca. 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/USZXT2455854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc351460a5947b91942bcb7cd9409c1bd9c9fe127f3fa94b05f840873e57d9f. 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/USZXT2454018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00475409ca5a55f86e71513629d41bb7cbc3fd93d77f09357c43eedfc12ec6ba. 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/USZXT2454399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42139a255cd2f0d7742df848126fc9051f688ac4b13a19c960b1d73015f9479e. 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/DEHK92104717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd117abeb2adcecdef7faa6365e24d0a9c86a761e4238f21e19ce4b3361b8cef. 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/DEHK92104563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc3f6e0472144dbf0b19f297bf462c9fcc75704add8595326991b06ccfad98. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/DEHM82100026.
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
Summerfield Records präsentiert: Mallorca @Home
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225807ee91a47f92b596bafc630496b6e5fd19c1430c0d9342102344e81f75ba. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEHM81900994.