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 0x65676012dfe026573439313d30a0fec1fa17cc88df2c4beb026c3f20e5338dc1. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed5e9fac-abfb-4052-8da9-4d4edcd3e3e5.json and https://artists.proofprofile.net/proofs/artist/ed5e9fac-abfb-4052-8da9-4d4edcd3e3e5.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 0x25525f18452228b4b7acd13b4679b5f5271095d26d2d1865b500348c87717598. 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/QZN882569402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4c3f868bb5ee5a6a4c392c7b611d6f6cbe9fabdbafd8d0fa20435c6f3d3697. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZN882582724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf844dc87cc19bdfa8c951e3560717aa686a40ff1f718c8689652088b578cf8f5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZN882582725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072f5e3e6ff03524357b32d37168e4e30733548e3248f2b3cf73023c0c4f5c92. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZN882582726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577ab35f81d01072a9265e06680aa591e92c55511b755150aa52591b6f0af88f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZN882582727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb096ab8776731e4b302462d8129562b71292d812997cbc02fe2a8f06022f6e69. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZN882582728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e32445d3c63ce14797321f894262d40397c641e10d6cbad72a90dde7701a23e. 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/QZN882582729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f0e8c68f93896a432fb2ff58e51b53980f6c189973a4d200d116df2719986b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZN882582730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250bb13f026763a99c384d1eeda3ac80f46e05ac885a12c1f96f98da4fd7d5ea. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:02Z), 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/QZN882582731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb691bb7fb38b959b09839f420aac27189c4fe09ee91926bd9a787c41a7a81a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:43Z), 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/QZN882582732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1597f21454894decdf9d6afbd6b65e59828a30f14f61400505597e173900c9af. 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/QZN882582733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4c3f868bb5ee5a6a4c392c7b611d6f6cbe9fabdbafd8d0fa20435c6f3d3697. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZN882582724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577ab35f81d01072a9265e06680aa591e92c55511b755150aa52591b6f0af88f. 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/QZN882582727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb691bb7fb38b959b09839f420aac27189c4fe09ee91926bd9a787c41a7a81a. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZN882582732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aa24d17082a48e4f74bef62c44da586f0bb17680f9f52058e33ba90e11cc9c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:39Z), 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/QZN882594344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e81a943e92f70feb6d3d7efc13dfdf6eceb861e3fce9996acef3e786432655. 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/QZN882594345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b413dda9926c650f6ee659a9bc972068b6b90ab464699ee5223b1c679e50edf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:32Z), 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/QZN882594346.