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 0x170f7a85ca83a747dd74cf1dd24e813b4fd845826c7c0f996f4859211ad1b18b. 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/a54bde42-1b14-4d8d-a4cb-a5da0126a7f4.json and https://artists.proofprofile.net/proofs/artist/a54bde42-1b14-4d8d-a4cb-a5da0126a7f4.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 0xa3567646e826bc49c34893b9b8634569f8c66784f24cbc33884c21f01a74fedc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITB842000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f17aa3807f546aa4e4a64240415a09d2e965921e8292b97c8c9f6d6f3d066e. 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/CA5KR2005481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8747caec93677245fddee6d8182cd19d82c0b4444ae895a6216372f3ca730a4d. 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/QZMHK2042158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f74ba2a543253b4d4ef12ed01092c5042a2e74ea208d82d900a862c00e357e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMHN2055819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c3a7e621e63fa67d35eb9a3d11109bedccab3ad3add0abfd273ec0f3b9709a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NLCK42229645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45b55a926e7902ac72007620bafa5a06c45b0c27946d29064fdaa985a09f65c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:47:01Z), 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/NLCK42229647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde605a0a3aae6fc7183eccba7eccecea819808fd34fb39c4268c4eb7fde772e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:11Z), 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/GBKQU2418674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15d2f8fab2fd309370f17795f29ccc5174b85148b4bfbeebac99d607515bdda. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBKQU2418676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d52a4b2a978c948b91da0a945833f87f87ed13e80fb3b599fad1eab7bf9941. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBKQU2482011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9ef820b90e93aace9a246392acbe62a8022033471025c7eba5774db467ea37. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/UK6822116797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa403283b26ea856d49fdbb7a5ee6e9ceeac98af2cd7233b9807f4bbd74e641. 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/BEN582100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811141f372fd96f03043de029ef5bacb87bbb54098c8d41ddc4c6104e098bd7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX202273779.
Playing With Spirits [KHAVA02] - Original Mix
Khazad Records: Various Artists Vol​.​02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d80693239bc229028cd4185ddc0679ede2cdb271347f27172e16a59dc16c37. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR2136841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec63b8a866152f939b9cd39b2ace1f4f8d0a6c70a73635ab6c418f1d68eeb99e. 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/BEN582200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf627872ca6d75ea319bcbbaf55ec402d31996f3fea506788f156219c981bb7d5. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZ5FN2133837.
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 0x0e1bb00fba96a1e3258f9d848276bec4d78bce3f6f53562f1f116236b2f8d2cc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USA2P2416358.