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 0xc19f3a25a58aa34bda7adb255ac05f26cb035a69888ec1536db3e846cc5b3b19. 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/cd4eb2c9-94c9-46a7-8148-79c7db1c37b3.json and https://artists.proofprofile.net/proofs/artist/cd4eb2c9-94c9-46a7-8148-79c7db1c37b3.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 0x3806c89dd1b4b9caa63a8a6fb8c8238ce190b8923facf712529fdb2267987b10. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEBG61000829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76396a8412fa2d70be7bfb4409aa076c806100a20a294d4e87c6845d10a7ca2e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEBG61000830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c24ca25d3a19bd0c5137e5c22f3537e7db53ab82867129cf4b7778b80f40408. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEBG61000832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd091515ea3c33381b38ff42387825ef09e997da5b959086b95ec7f2da5f0b1d0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEBG61000834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86014bb6c2860cfda784e8756e2b05de03f8f8be0f0125095f05d982235d0532. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEBG61502689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cac0f899ded45fd1ba46c73edac6c8c48f036567ba592d290249d92bd991d6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEBG61703718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b396e99c84d0365d51b30094597835c9f77becfcbca5688d0b64dbafa1c1160. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEBG61904469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128e39ebf3d7a0f6588e926c12e789e493e8341908b0e65a444d64fae0d44848. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEBG62105048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5153450675dab5c4e544e6a91b97559bf75fe175d05712f0a0ca1312fbc8ec23. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:51:36Z), 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/DEBG62205448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6494eaea17b1f08ea0f049c5acc60078815958ac08a76ae930725edef6df5f1. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:59Z), 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/DEBG62205451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b35453d97654455656530a48eaaaf3a5e202a038a1724cb5b12be32ab10db0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEBG62205452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56733cfd64ba445394805457a567239681435a88ca6036c62b64a01285f3ef4e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEBG62506065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb860d63f5e455cdfc296f0b641743ef901901343fc3cf2e30c267b748c2d3b9e. 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/DEBG62004922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb46684b5f90859fbb0b73ba203ae47ef675141a7c13201c3f783d3ec527f9a9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEBG61201399.
Klassik Lounge Nightflight, Vol. 5 (Compiled by Dj Nartak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49be4c4407082c20a3374fedff229948b7d83504fedb766d2ccd06f6efc84bf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEBG61301709.
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