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 0xeef49a801ef99d6ed9699f0f9928cdb8e337b7b0ea2fc1903b8c2d8e8655fde3. 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/4640c306-c8ca-44c9-944e-e89ea73a4702.json and https://artists.proofprofile.net/proofs/artist/4640c306-c8ca-44c9-944e-e89ea73a4702.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 0xc49100f12cd1b4c4e17955251b29d95d16bd521db2a33862551876cd97902373. 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/GBSMU6940884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060e20662778ef011376d561415c8749d1a189ec8882aed8d03d647539373cfc. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:22:42Z), 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/QZHN81927029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f74bce3465a49fda3bc0e3275e514b0014d60d1aefb2bef016d35d6c1f44be. 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/QZNWX2023616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938bdf64f9eb3fe8e8ca7b672a119ada36d72364aab4ebe4a6c9ac51b3814768. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:43:21Z), 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/QZFZ72168461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c56f9b51f2c8237bb52ed0a3ce3bca2f477702dabd8c89296ef232bd925171. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZHN82288499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11d2ce76e0ff85f8a2885a0cf43e912c4f621e9679e75a30e0db2e5d755d10. 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/QZMHM2263180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5297cc9a31f461f74b8eb5c315385a9fc10519b8b5e6c4dae52428f44577c7c5. 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/QZMEQ2224310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1761fe7bbcad0cc206cf33a40a90fa88f84b599c22c302962a3713310b5611. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZMHK2374112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a0e9ce0b9addfb0cd52de3aa761eea0e8753f381d0a3dec62c4b5e42ed390c. 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/QZMHM2395375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84710456fe962a7535b5f7f2cb7dec7ee1197fd0305f8dec06b2921caaafa4e1. 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/QZS672461542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c19486a1944cf5a48ef9793b93fc3f71a5d23f658bc5a55b729be315e1d0e1e. 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/QZPEW2583957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67185f60636050f2600328932cfd3d995c49d67ea0e69aa029f3c62197b763b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2110285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc034a709512e9956ee21c6d6d0d9487077403e2ceae838b9ccfd6aab5550b98e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEWA2303727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc034a709512e9956ee21c6d6d0d9487077403e2ceae838b9ccfd6aab5550b98e. 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/GBEWA2303727.