Negative may refer to: Science and mathematics Negative number Minus sign (−), the mathematical symbol Negative mass Negative energy Negative charge, one of the two types of electric charge N
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 0x1b4f962d71ed453449e3e8263b0fa3c3f739ea5b0c7d36d87af457890486ba3f. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cec8b472-5940-4eb6-8d08-37c05d2ba513.json and https://artists.proofprofile.net/proofs/artist/cec8b472-5940-4eb6-8d08-37c05d2ba513.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 0x13e6a26e44e126d2b13ddf4c2f1472127f1114270cd3e300e01f5da5f471755f. 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/QZS652473580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7489f50bb9aedfbe36f0014040424c7c5f7985a07aaec03b902caf106d28f24. 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/QZS662436059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4f883f4e4d68203db743def29127d9c0b0657799353b161dc1c7d69fc57625. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZS662461160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1efd95c8a791edcf2439babefb17c299ee9fba85c3ed5c0291df65f317989a. 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/QZMHL2442638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c9c937783171b752947c28a8a9b33adc8e672826eca8fe622ae109e760352b. 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/QZMHK2443941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435337463149d759a94167b9159f7461951276e1e2bc6d08f318f19a89b6fd77. 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/QZMHN2450754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf358a3f9166f016e017f9951fd6403d069ce93f0a07214fbff044028433662. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMHK2449200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5229ffdb9231aa0beac1d20378b7d623d71bf5f7e82aa29ce3632670a50c4e6. 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/QZMHL2492100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8e4be87979e347abe7791ea693e269eab41e148d07d72c5757f720c824bf72. 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/QZMHL2428542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b2d54132d0d593337220fd57e194114f6fdedd1d41306f2430fd322c8f2e2d. 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/QZMHK2463042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7492a8d9e64a0193c2ff3f7479d9a6956035cbf06273c015581502147fdf56c6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZWFE2349144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52153a74d43779867b4ae75d07bdabfc1c92a5c540a48f970bb6e0874cf97bd. 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/RUAD62300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc3af8b8434ed9888a4a817a6b33fc58f2e47a06c67a9e661f35b612d74edd2. 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/QZMHN2397243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d1f485bca269666b437add7828b6092b86982681a7391f9f00b2f855bb0b8d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZMHN2373657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0b2a7457022d574c67b2ff2960e14f07aa67329b02996e8152b1544bd0bd42. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZS642366954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9344666a7281b242487610f3cf9645597378833aabf3c5de82821a2bfb9181ff. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM42K2342435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac02c59f76de4d5ca83d59bb8ec58453154780f06f578c29e1ab0ea6fd3bf44. 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/QZS632303564.