PGR may stand for: the stock ticker symbol for the Progressive Corporation, an American insurance company Patriot Guard Riders, an American organization of motorcyclists whose members attend milita
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 0x703ed37ca8568e6419fa24e9fd6cb0be427b879e7a45a110daa3be1af12aabd5. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2865a17-299a-4259-8b39-a8aa456fb23b.json and https://artists.proofprofile.net/proofs/artist/c2865a17-299a-4259-8b39-a8aa456fb23b.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 0x45e29106de23c161b3a46bf31af66a1ed310fb5b30327058947e1967b81a6e2b. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:29Z), 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/QZWFT2485373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af82ac168c343e0d21baac33817bb4cfb7192f2102aea1d9601cecf97d1bd6a. 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/QZZ7Q2474356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9220ca3c495cfc35def37872dc4b13d1251661d985e019733b834b24ff836581. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZPLR2523521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e611dc5431b080b8bf760a0dc60bf77808aa7d4e85b297a4433e14473f101bb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2519249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af82ac168c343e0d21baac33817bb4cfb7192f2102aea1d9601cecf97d1bd6a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7Q2474356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1640ee4901186e9c2ca1a2828f91a1fbfec942a4333b54216a3c1817deb4df38. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:28:40Z), 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/QZZ772589652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6220327af8c75e6eec6fd06dfb8d79feb53e894f7737eca7ba685460157f56c4. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:18:34Z), 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/QZZ772589653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7448d215bef83251589b8b1599cf358adf8e37a64ad1a0a64fc83cf622ad4cd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ772589654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e611dc5431b080b8bf760a0dc60bf77808aa7d4e85b297a4433e14473f101bb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFT2519249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f2c1c7124c2cd5f0b0415aff4fde1937fe655d0db1e913b853351f21245a46. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ772589655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb754113a3672530876e06004bb14883b47129b0a336f34ea54a3c76a920457. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ772589656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d3f5b7bec5eb2234ca98e35ca792ca90d3a9711da7a6ac06f386fa8061abd6. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZZ772589657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1003c6529d6ea126ad4a86566c195c80afe43e3fcc8303fa5483e7ee0504d3a6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ772589658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259f81eed02c1f5f79d8d764554a9f935329da852f1a80b81f8367e158f1517. 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/QZZ772589659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c78d64ff4db07b76e75277a6708fc90bb125c7460b222862239f6d8af6f5f43. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZZ772589661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b876f4765ec66005834f846d83169e72bb9443881a22d3cd0819687045f3ae. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ772589664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28255497e5fa98c69904014952cb1e8f25cfe993964c4dd6c5f79d3f70968989. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:06Z), 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/QZZ772589665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240d7e68f81220b7a8db9bd57fb3773d0ce8fd645f9d49257f38e73be04bcdb5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ772589666.