Blackout(s), black out, or The Blackout may refer to: Loss of lighting or communication Power outage, a loss of electric power Blackout (broadcasting), a regulatory or contractual ban on the broadc
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 0x0573a8128d285caf4a197ea6ff859e04d69360fb1643bcee4681888a47ad57fe. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5afcd441-6869-472c-bb1b-98dd978b457d.json and https://artists.proofprofile.net/proofs/artist/5afcd441-6869-472c-bb1b-98dd978b457d.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 0x504af5489fd541b97268fff38eef12bfb10b6d4cec6eec88ac18c93291c736ae. 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/USL4R1943852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7df2ce0f45e0842cb06972a63d6d6d346e5759bf5827218970e464dbf19488. 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/USL4R1943854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ed0f60392ffd9a5591582b168a354e0af0a65989221946c638dbd0e5a63432. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USL4R1943855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf06c2f9fb2a2ff89d29946be0c96e7994ff5b2d5f80d7e11b1f8f9cd1b5687b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USL4R1943856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586cd21ccf7e259298cc5be49eaa93318a41c2fbef47bc404959ac5c1a90c241. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USL4R1943858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dab0c53f9de87c1d78bdc33ed4f181e74d3f647bc5ad3e44e2d430480053b1. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USL4R1943859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010308aa272b03495e52e2ef2341c9c406c764d42e4d85a678ed71c2d5c17580. 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/USL4R1943861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb63acd32ae726aa336de3e6c584b24234d2392a83c7f550042c1780aa2a1e56. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USHM82186562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c893c9cde43187b95d7102874df52a6cd9e52eec7af5658f70cf6a6ae2a6c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USHM82186564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a614920b0ea5d4d0b1e5a6423b0183eaff9ce5520ded1f5a3ab01fb754a7408. 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/USL4R1948132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ccfdaaef6c377bd1d56b3aa9a0abf258c48598a9fce10884446fb6216a1cd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZSYP2391947.