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 0xc9f9bb40452f266561dcd3b18308937d76228cdc62332c71641abc43d8428803. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21a8e485-665f-4a3c-aa3d-8b6818e8dd15.json and https://artists.proofprofile.net/proofs/artist/21a8e485-665f-4a3c-aa3d-8b6818e8dd15.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 0xfde6aa6ab952cdada27c6a29dbc95f048cdcffd0f561e754d523cffb68dd3957. 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/NLRD52355145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfef6220d5432c3841f1e6eaeb917c9aadadab361600e51a359471ea36783ee5. 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/GB8KE2307413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3618a9ef11d9bb6774036d398166acfd52719e923b365970e15cfd1f1eb7f383. 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/QZNWT2028869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a87e2b5330b926e7a1594ce1a7bc2b18df89d9a4f309189c7dddf9f0d205ffe. 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/GBKQU1772576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25e5991f14d3b53ee5511b31a92283bd3e3ef4ed450001d5fa772af524268f7. 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/GBKQU1772577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8990688e67a6cddaf9e089b362f158db5f8c9001deb7655df5833c9d3487a35. 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/GBKQU1772579.
5 Year Anniversatea Part 2 (High Tea Music Presents)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b93bdf62e75ef67d5cd5022f6bb99da5d433893b4e8476d7e4f5dc88eae8c17. 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/QZHN52527934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb937a03af262e3e93f3237582affe2f11ae9c16f59db45f161a139ca170fafc6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBKQU1861577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2298bfe2dfcf87c6e77654d3a2ae6986100eedb7df89610b23105ba7ec59662c. 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/GBKQU1652751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656da45b2738c3af2922b1d5a0821bc1de0fcfe50f690fe40fb903228ca0ab97. 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/GBKQU1695347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4e2b04b0fb411d36d7c64d9893a906d99275c386d6b074489e8d44f842c448. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAHH2318001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe78d353e43a4d84eb0b93566ef0a7d75695ce3d5cf5ec4383bbc1d7bdc76dfb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHH2318009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa0f2c19becb3bb87df2074caeffb6349254be89d40f4262bfdadc76559e235. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:05:11Z), 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/TCAHH2318020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba0129f4aabdbba90607c6af09a6fc40436c96cb39d8c5511c07a5c6dba600c. 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/NLCK41035505.
Nu Venture Records: Drum & Bass Summer Sessions 2016
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