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 0xd3958ae81fc6f5307a5882a46ab5fe2b25d78b979ebe3432edb8a27b6ff9acaa. 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/ed41b95b-e7ae-4a40-ac6a-ccc496fa5fe4.json and https://artists.proofprofile.net/proofs/artist/ed41b95b-e7ae-4a40-ac6a-ccc496fa5fe4.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 0x3cca9b18c3b40fc51591579f507d9925032985a94eb8c05e3ca6e65be421261f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:15Z), 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/QZES52599034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4568adc911475a824e6d58f7535638d844344102cb0ed73e1ef7814bc67a9336. 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/QZZ7N2488072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a2dc40a5b8c0ed03fde92b6940b1248f9e5cb9bc95055c08f46b5681cc6e2b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZPLS2424994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55f6d6fdc2ac236f24153876032457e5ed4a129a50ef7baf8f183f678a895f2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZRP52474854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f3c17c7838d832410e8cc920a2ca672dba97129abbcdc29cfeeb053ce09f71. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFJ2457248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ac637ae3184f659573059d7710082948f3400caa9fb61edd40324965f2e881. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFT2420632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdf7f953ccb209ea6124499fd454a6d4f962a84258bfab2a3c328c927f94f01. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7P2473691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1a6b85d37ded524548a66914adb1fb75202cde3706705a3e5e14fba6614492. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZZ7P2475779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f6b1635ebb5e4159436c66f4e707a219b852d7c4da9937b4d34f706c9dbf9f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN72525161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc701b1cb0e936f28f10ced5aca5653b5317142ad33f51c6bc9c8cc7afd714291. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:06Z), 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/GX3Q92590583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0fb5b2cfd2151e42faa8eaf03cf14fcea5b92e1787c140240d6d1bb138acfb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:48Z), 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/GX3Q92592080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c039ee504533fe24d1c86cce2a3e9cde4215d236dc29c5ceb02b9671a72ef4. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBLFP2514334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae05b78d3e8b5827335a20ccd9675e0f32b80f81c1cafb595254584c7f5618d2. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBLFP2512462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f226349324af235134a4816d5f50acb8da0fbf5f5c6d992b5a09479ca077fe. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:34Z), 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/GBLFP2534481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1396247c9fdb01a6c0dd755a90bb9061b0e71c364fcaa6d6911e4805e22291. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB42554682.