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 0x3826843a58a6710ea5dd6135163487a4ca9983d58d9561cc01e440a7b3199547. 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/cc866bd0-e072-4e65-ab50-f6ad971f7cf0.json and https://artists.proofprofile.net/proofs/artist/cc866bd0-e072-4e65-ab50-f6ad971f7cf0.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 0x9dc871fdb80c4e5b5cfe624bfbd1e56baa99f32f0db4b7559036d59165a065cb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6P1940158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70b5a3545f088f2237e6f065a6fbb4d4bed67ea5d45e7eb106e0300731be593. 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/QMKSC1901071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b7aa117ef3054e3c1adebf9871750101a0428ce52f7d26b37e39cb8b9721e5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:12:10Z), 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/QMKSC1901149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03a8f8003909a89e1174b4472b599c66a73e361bcffea1ddabe1cb556b4c78. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMKSC1901387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ccbd2075b6e47f547e40f3b95309794f6a370200155aecba615b0e0312eb74. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMER2292472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f6afccf8df077c5b43ef9b61b264b49e80953df132b6fe069bf31321002843. 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/QZFYX2217770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb56a37e335423b346457002e809b37fbcbf9eedb46c5a5a0b5c57b3baa24d14. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWZ2229405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d2c1bf2d9051c88af347acbf320d5be3e011d6dce1b6d65135cc1c2cab050d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:41Z), 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/QZTB92235453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040438b474f0bfc98002c805b484cfd5a90aeeced7168abb1349c2e9c6ce0360. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTB92235454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3e4664fe7db03a14b9adfe6641d476b1bc86919523a27e434931695b76039b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTB92235455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b60a8a3d2d2f910ecd9fae64faefd08045e4ef30e0f7266172ac4f7c577ddd9. 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/QZTB92235457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51d2ab8f56561dd19f8257fbedefd2497ef5b129b212ea1e16fb085a8a99731. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:44Z), 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/QZHNA2301083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95eee3e25c048551ff60d86e7f2d4fdf780d43c8b8702fdefc72c7ff58aa159e. 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/QZTB92369547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833050c112be96112bfd30130735576889675c7c5ce9355bb58f01de04367323. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGYN2400381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b75fed8937759d9012558e3cc9bf3cd9269463d95f4f39f97b9f95046e27f6. 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/GBMA22473868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b230ca625493dab24ac4e21a9c45bf2f188840f3b947e679079e8faf4192a8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GX53U2457106.