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 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 0xa00042bd69bce19b8a50f676cc47ac11807c4ef9d578a5728cb05d25cea94f11. 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/05864d14-17d5-4cbc-ba43-8ce309467ef3.json and https://artists.proofprofile.net/proofs/artist/05864d14-17d5-4cbc-ba43-8ce309467ef3.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 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 0xe6ae781013713a20f63dbfcee5432fd5021f37ad3e9728a243f37640747fa2e1. 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/TCAGQ2227721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bfedd4657e8eb343275153f5942303dd0b5d08352d7f75649f26496dedc4e3. 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/TCAGQ2227738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e8b2f9966d1c5c17452b9a0351007a3daa5cd2184587a47b2c940f1420b96. 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/TCAGQ2227750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3324fd71f86285eedd2c78a3d16155e760e0fadb189175059bc2333737f2ede8. 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/TCAGP2222916.
The Sinners Songbook (From: Hunt: Showdown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d978f51a66383907c9eeda895a41d7a77ca669d8a56f25987058830afcbfa20. 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/TCAFX2142104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24ec92ce4535ede77ba21451899d3100279cca25c66f382e9c1179b653e1fe7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFX2142115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f7225322defedbce1022f92f898295c71f9e95d0600005130d0e8c8df97de. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFU2145098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d06a707b3f0b51c72bf13e8592493db252fcd096d1710ac61dde0cdd2ccbdd. 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/TCAFX2142211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aac91bee21cf7142267b8d029b26086d8d85ba8c865bdf0f0390c8305001e56. 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/TCAFX2142270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870fb1115a35653fc34d62fb7d3924defc79f337e1c379d2dfef64948724b7b3. 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/TCAFX2142332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22522a05630c65e47c3f6a319a0eeb89776b0e40287e81b8725b0b57c9fd4298. 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/TCAHO2363495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288479eb500b6ba6a193a8778753955a993028c219da42a9a97e73e1856fc01f. 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/TCAHL2380270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320cb8da8c32fce3992b3f15d48a76c2796e286efcf28c720ee2a83199145a23. 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/TCAHE2352819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3324fd71f86285eedd2c78a3d16155e760e0fadb189175059bc2333737f2ede8. 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/TCAGP2222916.
Death Is a Bird Flying (From: Hunt: Showdown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f7225322defedbce1022f92f898295c71f9e95d0600005130d0e8c8df97de. 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/TCAFU2145098.