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 0xcc555458e6e19e655d66cd25218237f410cc36d928d3b0b837a1facb51ddeaf0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17ddcb6c-c6d4-45a3-b47e-1ef8ee5e9632.json and https://artists.proofprofile.net/proofs/artist/17ddcb6c-c6d4-45a3-b47e-1ef8ee5e9632.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 0x756ef1fd7a819ea6b6f723d3403a50c731307bffd57fde78db970e1308102616. 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/FR08Q1700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aacbb03b508b700d6fec28e393a468a759ea0c5e466ad8e5c142790c69f47b7. 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/FR08Q1700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91995d207b7ad0ff9e72b2d0a46006b69fb018f07fd47a27960a16acf14d0de5. 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/FR08Q1700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81053106458057e74b15b1ae2bf868cc568d5d0e9d83052e2ca065abf78f6d69. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR08Q1700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4f81bd6b0e6a437007cd72293febcc0615771b1210052630e17e55581ce184. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR08Q1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01d71abced694987413b5b021802c8dd699728ca466d46475887532a4462694. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/FR08Q1700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dff9ee6e96ea6b5bc408a02642455debb9d3657e92c8df805f159bda85fb03. 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/FR08Q1400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf51a62754d587bbcc20fe1f068ac1b7283c98452c87773d0e147e5eba9a6c9b. 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/FR08Q1400541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e387a26a646a1bea08d72005afdd306e08d97df8e7acefe7b04358371d1de. 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/FR4EO2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf931e409da7af590f8901452e8f669ddfc658edaf4b8a94f70e9052e0f8a5f. 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/FR08Q1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed374302208aaa715655224436f5c92b103a6d225b68c58f580255233ed698cd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR08Q1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe493a629687ff278e214b868ac2c6281dd258ba301348992260f17207ce1cf0f. 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/FR08Q1500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04208b20d1623b16c743b801d06558c91707ac5e33adbf6b586d1fb0895144c0. 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/FR08Q1500565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086de833924aeeb34103d274c5346dacbb98f4548784c1f1d247e0719d106df9. 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/FR08Q1100450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865387bb9ae2473c6564ca3f1251728b3a68ac9011d74bcfe1bfeca4bd787fa2. 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/FR08Q0900369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e31b941e51adc6a1fd15929cb6778803dbf87f8484c4bce8b800de9e84d7eb3. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR08Q0900368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14fae2ca9a0a4159f54d95402f275de670d59808cba73b751a48c5ab8c9fc58. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/FR08Q0900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40e37ee4a6de620a63a21ae3c481b772d1e8ebdbe662d892225acdb32b07f2a. 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/FR6V80728390.