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 0x3d3803b1787fe7e4088d50a340a8ec12beaf6ea556b300f350d31537a7d48120. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07b46ff6-d2cf-4e79-976f-160cfe602118.json and https://artists.proofprofile.net/proofs/artist/07b46ff6-d2cf-4e79-976f-160cfe602118.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 0x6ec216b78be4702df63cc8db8c765a3723578e043914d3bc871820f5eaaf2ce4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCSF2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aef6060effb605c3dedec2ad8fee51f05dd50adf014ef6b3fbe88209e04769. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCSF2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113275165298b8fc78e37aa4debc07d925ee3fa847f5c25cd4bad3b9b1d83337. 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/GBCSF2000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c459bf75c80c014819d8a4f64e9242d558591d15d2f05ebee0b3db1fe72f16. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBCSF2000054.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b116f7a8ef91ac2155a87839e28a482ca098cc6e90c932a5ad0a7b417749204. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBCSF2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a09da8b0d8ef915757b6989749f411acdbbbf7fc79cd7ed70c04792b05e931d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBCSF2000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90ed7c256024e68d04e51faaf8db5a5628854ac9e6db17e2e745eef0aea29d7. 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/JPB641700313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7781ca2531734b9efa38fa80ef9c5ab77f19088ad43cffdb1cd45b4b1f069286. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPB641700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6585f7b5e50a743888befa3392bac21da3eab15ff9b0403ada85ab20bafbcd0d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPB641700312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4f4acd1f24656bf0f57cf87554d1699ce125dbf5cb0463140a5d0561d8b4b0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPB641700314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344c4837aa98e0c3aae9d75d3f62871849a3e7035cca9d660135cf603ba322bc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCSF1700049.
Rewritten Histories, Vol. 4: 2013 - 2017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb4de35e2e8c7dbf693ee5aecebc948be4ad6e267a00f3d9e236cf7be582cb3. 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/GBCSF2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9818f366136b9d9006f2518e8c5393200dc0b77e020f7fb0596117581fa1712f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCSF1400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8a118f3bd3754e22f86b1af516e04209f0c9e8df672bd688574535195e55a6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCSF1600003.
Rewritten Histories, Vol. 5: 2017 - 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f295ac312e1b248c0517fbbbf9916150fafcc7ae54a2c8605366374af217b7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRS182124930.
Fake It Till You Make It - 100th Monkey's ZNA Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c4ccca5f8028f1dc040ebbf7319660fc10a6f318bba93f74ab444ac1661a2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCSF2200028.