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 0x70c767b479267c5f19cc754c6e4247f2ee1cbf3d27be4a4e3cfde12520fd470a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d94179b4-9233-46ea-b4bc-2952603ab500.json and https://artists.proofprofile.net/proofs/artist/d94179b4-9233-46ea-b4bc-2952603ab500.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 0x09cc8b57f043ca7e4290e4a38471e11aeb9dcc4b46e0cb6ea9ee3043b9ff6b1e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZHZ32019014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e6e50b19717bd5d99772972798f734b052109df14c4b3ad4bf6ac992e07cf2. 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/QZQAY2244507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092132c34766449fde5f8191fead1fa04aed87821136eda98e0b050da9097220. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZQAY2280469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748fa63dd30ab2d09fa74f81cd51d0b6951d1c576627399f36f2c3ed242fcff0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZQAY2367258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f7277bdfcb57c1df2f3b0af0995927923129feac7af2fe6cea618003ce84fb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZSYP2326781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db26896de5a46621924abec8ec643789b39e3d2612d4a92514b2cb1bc69b4c6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZS7J2386538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc2de15139151b17005c84b360394f5c2cb9b39fef52773957a7a4b22d885bd. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZQAY2444356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405ada76a1a09f834dace1db4cfc10150f3546324cd3a101a452465b87c9a115. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:28:12Z), 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/QZQAY2450445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748fa63dd30ab2d09fa74f81cd51d0b6951d1c576627399f36f2c3ed242fcff0. 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/QZQAY2367258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1807de332580da7b5c5ed2fdf65319245acf94a0cccebbdc7505a07959f65ff0. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZQAY2427460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6780f19920e13d4cca8906ecf607ee83186c503e51d867dc8e7cc028ffbeb8c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZQAY2405359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9256f27e79346b1b62103b53ce53aa381f3563d1f115f0c83fcc2735a9ed2152. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:40Z), 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/QZQAY2406938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb981167e4ca2f4f62a46a0e3a7516350d4a07fc57379feae611461a26fa0d597. 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/QZW9K2281176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae8ad6908855bc671ac6128fadb5f711993ad241f62053fc404d7762ef4ab72. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ32173819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4746cb5fc347af9b1e57c1e6817a01244d448759eb497dc523ad68f548bdea. 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/QZEQU2301489.