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 0x09bb49b13fa8b52b6643f6b1c6a5cb2d9c797a568e67aa8f6032ea9cd5884940. 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/2e8fc945-25ee-4fa4-bf9e-ee34a7437e1f.json and https://artists.proofprofile.net/proofs/artist/2e8fc945-25ee-4fa4-bf9e-ee34a7437e1f.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 0xb766c745e7c1d1043177dc90636aa24c615819cd93e33ea5af0d88b9f4266cc0. 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/USQY50954348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2664ab7a99b07990cbb30014f69003112f50ac9fefba071120f599e09bcc8486. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USQY50954350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677b28e38ba91075417007ca9488adf30de9160c2db96e1e1b8445365a108e40. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DKZVA1661208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2486eb813a104be4527a2f2edfc1a3effe904c5ea2e98d32af61c56781d42813. 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/DKZVA1661209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb555f8c16578267c02e688e6c37d1cb54cdaba6da2095772b9a5bac7fda16a5c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR9W11820953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5d5ce18e6966a58ec6228d289c5f18ba74d4cb45ad26a7ee91fa796c2b4df1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DKZVA1962239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae37e8f541ac6d78405c343f7f55303a1431283ca6b09e6fae888a057d27f20. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DKZVA1962241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa98949dba7862426f239391be4764836902d8e1a2308a9fad8bb947fa15bda. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PT4HR2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d803f2faeeb2d330981c1db825c2ef24dc47d1836509c287f201957c01bd6e. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/GBLFP2473930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0cd640ea3c1ed9e42bd93156bd1ff52bef72df61610c6c8c7f14163fe09884. 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/GBLFP2473933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c58230290260652894300b6b37054c5028ab7777ce7daaaa9128e7dc564ae5c. 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/USA2P0749976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e2553af851b0d6e21fd2ebb68fd4e41a785ee93d35b80c82ca73929dced26b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBKQU1770436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1574c54667a4a63187a511425f4449b2b3cda3b485fb5aa25d304e89252f86. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKZVA1761374.
Klassik Lounge Nightflight, Vol. 4 (Compiled by DJ Nartak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd257815381bfe3c3f78ec78bd9c6cce797f2842d35a874dbd7d8a6d407c08e7f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US4R31109406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1bd7f688fd89a8d960ffa28d578be4d2da08c6d30eeb9d1d9f7f62bdda284e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW1825395.
Klassik Lounge Nightflight, Vol. 8 (Compiled by DJ Nartak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011d45710de2d1b3d29beab754a0c05e20898fd1a55891dc2b0e0f22797d2d5e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEBG61603293.