Den may refer to: Den (room), a small room in a house Maternity den, a lair where an animal gives birth Media and entertainment Den (album), 2012, by Kreidler Den (Battle Angel Alita), a charact
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 0xf356eac25cf0d4c48771f88c861991bb2ba310b3b5a362b0b1f154c3943c0642. 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/fdb24184-16ec-4324-a99d-31ca0f52a52d.json and https://artists.proofprofile.net/proofs/artist/fdb24184-16ec-4324-a99d-31ca0f52a52d.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 0x272d08c427d16858b0cf9ff94b1af0fb2c5a4b3954b785f5bd7a02885a023761. 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/GBSMU9307734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f60c11aa4abc3a1fe76ef8ef987c48d1ef89b6c566ceee13a8987aba208cd3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GX3HH2243004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2967c7ee71b25529108bec232c2b99670d0302327fb2b6d56b535a995936c7ae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN42236966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d24b8f8c4006709295ec43d697c8ad3911c914f3e8f610716003b5ee2f10723. 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/QZHN42246798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff68e105cb9be4df94c381a1acdcaef8bbde89d1cc7247d11f6e698f087f147. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6M2297318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46792883ee6a774f1d988d2a8506d03d972b9c8fad636175a1a963270aadccbf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEM2229697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa06c28ecb189f770a1eedd99dbb7e20f8968656290eb68bd82ec76ddbb9fa5. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZK6Q2322044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29478ce16cf9f1c2c05b15c8f9f80a204e346f967b650a46147e6c5efedf6755. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZMER2347229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511aa920571614bed64c71fc5feda93451ff37e33f8c56900260235192aec3d4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFR2368490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3227b14e6081aeaebd452a7d769eacbbc1c6a514f09804772b79353791d8ec. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEP2555230.