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 0x0aa5ef57464e67ad12e8c44b69b83eb76dadd68838b5155fe187a7d5426f5835. 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/b7daa94b-ebad-4bdf-82f3-f179c4bccb9b.json and https://artists.proofprofile.net/proofs/artist/b7daa94b-ebad-4bdf-82f3-f179c4bccb9b.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 0xe149a25b2f8a74880d71f48f8f61c74a1f0bbecd3e50e48645ffaa45259b1ed4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA71560325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff39a47c3122d897f94fc408d3f32b148b9a3941575c8216f9f1ee84b985959a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRVR11100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a5f0c4984dbb13da9ad047c2075610f859d4447ea52d75cd7bbcf93bcd7c34. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRUSA0400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d41770a78dbe08e6f6587ca37fd8a5fb7c464b87dd988c5f8a8ed00d2ac2220. 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/BRUSA0400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c5fb4767dc82c472027c8f3b0efe47123507a868713e10b15d4aab4a8f64dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2261980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc983fa1d7f4053add845bca0c666c0597ddb9ba4e7e02962e1e5187a8e2606b5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUSA0400844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0556310040db15dd09d41264ccf02c4b38979472a08e1b227470db2216522c46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRUSA0400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9fc5e1eca79b027518ebf7f63d0917941a93bbe68aaf5410d8dc3e89c12148. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUSA0400846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf405039af8b7aaa785f75f502d560b611f1a0f383ee0ee0cba4707d81d121f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUSA0400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61d7648ea82e17d5e41ef00a79c9a79f5cdab3a165d711da353a77f769a0e02. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRUSA0400847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3be22b04da701506279e4bb9a8765b14279b0e835b0fb9f7d002e336363fb6. 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/BRUSA0400863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf8fd72da0e0da15282f83dbc2dc78744b318418b4154c91aab08f5b5a5567c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRUSA0400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab19019af33c5624b738c11b8a8fec9bbdeb9613ffbdccef860158386db3fc5. 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/BRUSA0400866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af3a9beb241aa221a8531a6f202f15e24bea9cdea5340ece13e936dddeb5235. 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/BRUSA0400867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113ee00b364610b08f16869423496f9aaad771be55a537e00807806884d69933. 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/BRUSA0400858.