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 0xd663edb28c2d6f67e0780783a5204281883919e5ee500c005874bac3b41bce74. 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/c218873d-032b-4251-95cb-759e40190a72.json and https://artists.proofprofile.net/proofs/artist/c218873d-032b-4251-95cb-759e40190a72.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 0x9df4581b45b5aed5382a2688e9e056d02994a22a829202aae5b7c1fa83ab9dfa. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/QZHZ42270058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc602e0bbf049fc2e7dc7271a3abbaf192f75236d0d234825998c11dca2a732c6. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZNJW2287555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8935a900d87bbac24a3cee7944282213e3aaf3c5a5adbaae1080c25c4297aed2. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZNJW2279701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa26468e6e2c7f080c7d1c4085de62db5236fae4b7091dd1ada80be75b987a4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:54Z), 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/QZNJW2279706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a7cfbe99127a41c1da6c49d201191121b937021a3be29c636988b339f6c653. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJW2279709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ec62e9641e9f195b8e834d7ebaa193a47b7a3e0a6e9c74a1097aa0c554b34e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJW2279711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0569221d3c95da6ae51f92fcedae1ee907b0eca0c31ea142b43b4b0141d089f7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNJW2279713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a9a7e51138063086279671b6e9ee0c0c1a62eaccd2e7e3d29e14cd2cbe5f62. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNJW2279714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7142fd211d777c9215c5b46b7ff4d77bf9f910000751e21c6a405bd23b058e. 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/QZNJW2279811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb41102ed7d446448d6183890881b1d81dbcd736f30650fadb2678c5bf64ba50. 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/QZNJW2279817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d7eb26fbea295eb170c77aca86364ea825bfb0196f96ff58084c5209f43572. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJW2279819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6ac628d1fc06c88eee7edf668ce109c6c658964e913285922070502dfbbac0. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZNJW2279820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27136370049b2f994874f81906560670317b17070b9625872c5226679e21d942. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNJW2279821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b475395676cf2e0fabec5ff6f40c6aa5984800123aea048d23b79b626f22901. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNJX2216317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eca7d9de98a6c27891ab8cb4a55d5c2249212ff3bdda1d03e8f260fcdf9cfb7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJX2216205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830027b14fb58056cef428edb2583ba9bc4e0bda3f8a1cdc940f471c2fb8bf83. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZNJX2216212.