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 0x0512244044d7e16d3dc41951e95fe91f70c661afb7100f8961562695806e426f. 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/7d36ca27-8b27-4274-ac75-b084c205b1fe.json and https://artists.proofprofile.net/proofs/artist/7d36ca27-8b27-4274-ac75-b084c205b1fe.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 0x19eb5ee464edbd2ed9f11b0a41ce3a3c73af6f3662489d2678bbeffac2eb47b3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2251579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0240d2a5e09360a4b298fbeeafba60da7bff49032873d4fe3e17cbecdeb4a479. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:21Z), 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/QZK6K2251583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351c054888c1f9a292230826cbad1f3fdae5ab8759e95fb23d17b85a7a19e35. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:13Z), 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/QZK6K2249783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e9b953b3cbe55c3fe1cae637ce6ef547e9b78b7f8bb4cbaf6aa6d307c44e66. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6K2249785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62506ee1715bfc615ad4575b065506f71580f7a77eb4a845fd6aed652ecc7731. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:41:23Z), 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/QZK6K2249787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191d845c4fea6137fe90221d73b10e089b424f23719f434c261b9ed5b0fea92f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZPLR2015427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0f9e0f058faaf3f1f3ef1b68c0c2cd4cc3c43b35adeef40a3b2d9b5b8f9875. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZK6K2249789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca15fd64c92ab81f11ad1951f7fa46c521984a19f34cd8301aabe0126d707e54. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:42:31Z), 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/QZPLR2015424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bc8f53559f53b48c4da1085be2812f267e4ff1c4339d37917d8c4037b32308. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZTBB2343543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76895d4d38215672b9ca712080a2815c1a9b450a8c03ffd7d37bf6db437778e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZTBE2376096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb29b1ffc72fc80002620f2f7fa1e02bdc522eb58e8ae689b668ba435d8b18eb. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZTBE2376097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fce61a6a20a9f74474d4c78788daabfb6255f900d1a07ac1ea0968ebea700de. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:24Z), 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/QZTBE2376105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c8115e2d3d549e714052f14784378e863d76369e0d680f7f1ab0d94f4346f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZTBE2376107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e45eced55d9bc979df5c67e29d227d0ef8303dd485375eb6939d95834984d3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWS2469097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85fda25b21cc7198d939eb6bf122a38f0fcae0a0e7da6639b0ee65cc34e968. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFP2430310.