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 0x234418b68196af028748924add77fa308f983c216151ba78a68f07502191971b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc9324be-9758-46d5-8491-0393eedc909a.json and https://artists.proofprofile.net/proofs/artist/bc9324be-9758-46d5-8491-0393eedc909a.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 0x2d9bc5d4c7fe872f43936d54a35f38cea809ca1a9eebff59b33a2d14c170eee0. 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/BXHBP1901075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa902bd588e8a816125b646936e130751e9ab0e803e70e257efe21250890ff3. 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/GBKQU2181011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff1d7f7c84ba90cd5c106b64047adfb2fd35a321ce4c81130054949f7842245. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2148300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64e9eae363c381f5d9cfa4ffb6b81087a8e3f13ccb4246a946d8cbff0a36117. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UK4ZF2300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff45bd38bbc6161950a35fda5bb28f6812720dc2f7e086bd1ae1883e7da372e8. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBKQU2388998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be29f8304089c1f8917382bf101273e93e356906d8c251ef2c7dff45f4f6839. 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/US39N2307519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9498992ea1b774037fcb41942f3941a7b83c5fb0bb9f2ec7bf6411174df540fe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX7U52300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daa0ed10c179926dbeba710de372a8b87c0de3e6cc5c255041e8eb1a73040ac. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:49:05Z), 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/NL1ZN2301847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd57a92269b94b7b04abc43f71856d4acad95faa6d23168bec4b030dda7ba73. 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/NL1ZN2301848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ce2548e412a9d5a41da5fbcbe4c86bf5f78fc10b48bd89b2278b0023fb0050. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLDD62200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6068faf8ef9cc1ae39fa64c4e6b6131c498a80aaf75a2c8a675004b96c7e63dc. 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/NLDD62200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8002fd744a97ae239dec54da2f85db00cc3db07e2f32a97019989f095cf3d0b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCCAT2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffadb08d0a82a721fd6886805e3ce7d99c11698bb8c8af381b67d22b73ea97d. 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/NL1ZN2201950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad41a49ffe6ede4ca5d3bc1b866d541b8889bb4b08e73ef53c41caf13911bed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCZZU2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95cc16f9dafc108da21a0c6982ae70c991cf17f085b23a6db9ede6bbdce1b76. 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/GBPQS2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792f78cf2413c086e5f544d1801813be4d97739d965b8fba882158743c04d90e. 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/BRUM72200678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1277996ae17e8137fc8ce1c6adb33407251deb6147dcd7c21e3fb6f706e852ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX7U52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58909dd933d10ad65c1bee754a7eadaf67fcd8e5c5d2898a0fec260908f0f23. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXHBP1901097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa35875321f0a1b51ea2da7d8c1e3b529830ca63d6b6762c4a58143f167ab16f. 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/NLZ542100585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d6a47d3cc154a1c899c8a42a1989b2476a37b90f7b1787e8d607269e5381ff. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/GBLV62001055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a47a893da055db0b164d8799466501e0f5ba993f54f53ac625adb4a19f9947. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXHBP1900137.