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 0x4e9243b70cbeb983c0182e971ac4a66f7698485376d69d41280374a2548270d3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1612ea2c-4ca8-42e5-9cf2-9d3d0b396167.json and https://artists.proofprofile.net/proofs/artist/1612ea2c-4ca8-42e5-9cf2-9d3d0b396167.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 0x5e3086d9cbcf774ccd74f8d8fedf7d54ec1a8891a7f2927e26102d052418dd12. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/AUGBT2486517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c1a4ea2ce7e1e25d56cd9ad441686d01c207c02b7b9a20503bdaef8b0c712. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:05Z), 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/AUGBT2486518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5af958c227e64bd6d2159abb20154d331ab60c49c0a1c07047c344dc84bc138. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUGBT2489517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbb6fea8f5dea17e8040cff1eeacec00c8c5c1b453975c400460ad01d30ed73. 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/AUGBT2489584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4421f4c6becf2803c679f629ae088145d5bb8ffd1c5dc7bb97f6b87a1df1b69. 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/AUGBT2489589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1641d08149ff9c84e0d603fe635042156f0fe2c35a5e20b6c19544ce6433912c. 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/AUGBT2489620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4765259fc86f86402c95b8a011a288bc85b74ca416a67984981d2247885563. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:30:36Z), 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/AUMEV2506397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1734f68edd0c189579eb522172ae5cbe43d406d56a6bc8aa8764cafd87f43a1. 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/AUMEV2509622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4974d8d7d5745c7d42d9dd3b91f641fa1565cdae097a98b5392140e347446309. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUMEV2527031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9970e6314c3d467746268d264a1df26767069a97e781b86fe20f238832bdaa6c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUMEV2530818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cec0ce287b9f3d400699a7e642f19d57449a975d5ecdec9fb7f0e02c944b9ba. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUMEV2543271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf0bd6954dac6b816c7f5458526373a2e62d85d2705756b74fb0034657416c0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZPJ32472116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2576e6630402b6565e1d766b7724026c8b374b0d0d5a79e9060aab00692750ad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJZ2571913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f9bb4b08b16406bd81cd1a535f67ee98824377711f494de0cc5112acea60cf. 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/QZTPX2521426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5fcc163a1d3cbd5c6c298aae3d366ed0e4a758a1180cec0b29f76f7a6c0d21. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AR5UH2300405.