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 0x7f57a0783091c1095d300458ee7b7ceeec1d81ee0cc9567c289a0987726f219d. 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/f5a2ab83-3eaf-4c4f-913c-62c55e37eb27.json and https://artists.proofprofile.net/proofs/artist/f5a2ab83-3eaf-4c4f-913c-62c55e37eb27.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 0x1423e75063da90a9a7617a5f55cfd7680396ec056da7cf5ee9a0ca3ca6676e8f. 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/COAF42292395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05db05eedfe66f99e4b112391724756af891fb8ef177b6067a93fc28ac6aad7c. 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/COAF42493535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91304365fc2fdfd02315e3c80f4e1be418f9419872f083bbd79025817ef2d97f. 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/COAF42392128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1f1b9a945111bb85acabc4a73c6a702fbe85f77dc6a6e0cc44872745c31a09. 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/QZS7J2262614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a64db282bd493cad2673589f5f78f435da535d54c19d74c1deeb44cc1bbd6e. 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/QZMZ92189876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e1c2046b02d4b077c26b1b818d992fa4141f4ad5a787992e281fb75f685a36. 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/COAF42493795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecded82ca3336d196c6763f1113896cd81d492bcf0a88d3e54a2fa94dba2e245. 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/COAF42494994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96e17f8c5893faa8ff71afb078c7d00766f47180f5a160960c59d26c7c5f78d. 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/COAF42494729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade53b4dcf968ec0aad2fd628a00b16f00cdefd919609acaf987dfc851c31562. 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/COAF42495104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdbc0acbc00cd6ae93b02584351d7c4a69ad428cd8cb59ad52fb9c7da22b6eb. 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/COAF42492167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d9e0be431511d8e958e9d98bfbf59dd81f0ee51cea93260b45e3b65e375806. 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/COAF42392581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76ac26b829013625980dd923e1c4f54f8cfbfc110951a10706dc60021fa79ea. 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/COAF42390999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c5bb224ad90f2979b13ac02d8ce4e21915c700314856c37d80d89d03abfc68. 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/COAF42290041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf544e9e0fa1c71923e329007d8a06182d4600da51f4f3e49af13c12625aa459e. 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/ESA011961296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f965b8989d30756d4d739d73a92359996180603253c51aff96d4e1be11c44c0. 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/QM4TW2536825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef334824955ce072057da163986566345ab0263b5c403496e9c08424b2c0462e. 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/COAF42392752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf5faa4cdef79e43558e80d0d84aa98df993785965f6f28065703991093f661. 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/GBMA22328318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6973a4a45e797952aec57b10f8b2ec5e8513f29f4505eb5df35aa8efabaddf. 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/QZQAY2439834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f15d9f30cad45ccb8468fdceca4d7f823ad89bc56c3c2f423103f72dbbccfb. 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/COAF42392415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbec76309405573e713276897370301af1830dac3144dad07482174274731462. 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/US7VG2391468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d32b9abb6a99a74081a4f5ed75206bafbc7e55552d49813d05a6d771e8a956d. 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/QZZ8A2395339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01d17d5ac444941fc0b74f6bcbb78a2c7b91a13b8bc0cf8cd44cbbb113435c6. 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/QZZ8A2395311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4e0848ec6b315ad66b09ef907762dbd235cefa8eeb06e8761ef1a89a4efe8e. 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/QZNW72410904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680907ad1df6256804ffd05e840ed68d6109035a7727ad46b2eeed9607afb33f. 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/USA2P2449605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a8e39b275ebbb1f7cb3b71a5a8f5d6c84b3f26a3036ba9a0ed04d7d4baf8b2. 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/QZN882530496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864b669556ad4be00603caf21b50982f705a1249ddad044c95de27844fc2c233. 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/QZW9K2392585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7931cbcaea7e4dd060a8d848d390415558edf165ed01c5778243335cf979acf6. 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/QZW9K2304590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108041d962bb51422d451b60d0531d931da2ac3b00c1348ed9844504bc4f7b6a. 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/PYC842302635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee567c1b88cd3c47597a4c4679e433f2420b4e55cc2c7010199e40f0e088881b. 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/ES75E2301993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc576b0ebfb52c4d9a8b818371157a3f68515015302f81e9c8e3f235bba66dec1. 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/QZDFP2027052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42ae2c6058d2d91197ac13e4d9feebeeffa222cea7f0975c6741eb6599e560c. 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/QZTV32232695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52a4cbef6392ff36f2e32493f71a6e4fec7062667a394455c65e798cd948a7b. 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/QZW9M2233884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07705b9e0a58d95e291ea906a45a614701c85bc1240f39193dcd0c5fd2c60a6. 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/US7VG2252318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4cc5014906b0764dc955adad54b657846e4790e9876b584730a0dae4077818. 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/FRX202451633.