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 0xf4abb6224327a30cf969e3cd2cfaddaee9c913318e7da06e2fb043cb0cb59cdb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4722bc55-aebe-4ceb-bbd6-1b6a83773d38.json and https://artists.proofprofile.net/proofs/artist/4722bc55-aebe-4ceb-bbd6-1b6a83773d38.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 0x5e3f3b383b443aefadedf1bbffb4710c03907222df9ba30ca85a56a03697a23c. 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/QZNWU2036070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6af207e6eae88d5b48f37bfbc3df329dc79316391c14559fc5ac8066ce3bbd6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM4TX2102936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1898a61bdf67d2c05e09b54e837d6e08d779bc53b5d06b9ed9d351b4ddad3e0. 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/QMBZ92116626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c08dc43b0f24847c8b2a30ed44c30205cd58987f35a12f9426a34a1f8c6306e. 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/QMFMF2125924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3e94d0a884f4007013f79ae21037be4fbb6948e3f412b841695808eecfdfce. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM4TW2297377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29251092fea15a23e83a64cdbe778cef370a66bc99a369d086dc7ba58461bbd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES64E2201174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9100493220ba36d833932429a015c9c8a24756c62b6bf21fd5e2fa0885daa72. 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/ES64E2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e03ba8d6ed46f0b2480f2bd03294a68644d0772826f2c333e9314ca68a42935. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES64E2301260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9eb502d159f9ce10d89fd38a850091c563d660da7e925ebf60c77174cd1927. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:47Z), 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/ES64E2303285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb69515a43438122e4fcdfc4c1b1596d00c9dbdd5b57c84a06677d67fa8b0ea. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:59:24Z), 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/ES64E2307836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49464d22f020b6d628cc60f6d2c676b6dc76bb46d00be40342ed1adb1927d8d2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:11Z), 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/ES64E2457288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d74c350b9fcd49d82c42974a4b701c954198326a7f50fa528f3f2807f580877. 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/ES64E2472876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a3a1476a1bbd7a7dabeea6cd98b1bcecb6da121c5132d86e12f047c94ad8fd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:45:25Z), 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/ES64E2498392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c79f9bdd4b1c6e997356c1afb2a859eb93d041e8128bb52c0f918cf3ee1bdc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:37:32Z), 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/ES64E2411848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf18bb986ea3c20a4003722d0686db4303aea231bf3577830d0dae23b7413451. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES64E2500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eb4969534e95c41df7f60fb9c50a9cc854b9f763bcec9f5627076be9f6ed17. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:24Z), 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/ES64E2511516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39041b1c49583d81c7c194039d5e53c3b19f5eecf22ee40e071139c1fdf3eb2a. 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/ES64E2203499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4354c722661c226b3077ec4e90038b275cb05a1a96054ce6c803e716dee751e. 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/TCAFA2041436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9339f31be6e4dd233c32d51574bc5a437b918344c11fc82424a69fc206412d8f. 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/BK4DA2410891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f940a13df2c7cb088b6a818681fe79e43d0079e3f64186bd92c9ae7e229b95. 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/ES64E2201407.