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 0xe6492bd1c54fb5dce2e9e1315a23ca10a4a2f38f8deeb6c5fe87d968c39ac047. 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/c775d114-620f-4821-8661-8540a8ee01ab.json and https://artists.proofprofile.net/proofs/artist/c775d114-620f-4821-8661-8540a8ee01ab.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 0x3c26414d6e66f65c1e4bec298e3d434ee1f400d738e35795dcf7d1b635bb742b. 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/NLV5Q2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4155966f1c5bf973db5ae198bbe8f68bba6fa1ae0d07074b406a0a98b4563441. 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/QZES92011981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b7fcd016c6c0946f98604f6fcb2371fe0ca6eb2afdd50be5cb0d875865c55e. 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/NLV5Q2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560fce66aad30343daec501f4cb39bc6d071661dd8e4596e9b37d3f8819380ad. 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/NLV5Q2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef976874df22692e26e74e2f7b434e4a3af541ba4652329213f98213c566711a. 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/NLV5Q2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7c5453984cfc283482d5dd7f526bf9b95442c15705942a54a89b0e51608235. 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/NLV5Q2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb7213e627c4e36d03901cf3f216fce8710ec3699ec6e08541518f8a479dd7. 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/NLV5Q2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9078c14aec6565b1cc36062c3191298b798959c744584ba2f9fd5b3dcaac4d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLV5Q2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0814c5cd7441c33bc93834b46514e2f09121d3d02ee1e2c67287968f429fffa3. 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/NLV5Q2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fbd8bbb7f3e813c721ee0cd6bf3db98b8b7da945bab49c5a1ea349d8ea5418. 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/NLV5Q2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d1f2e59e10da6dae76e6912bb9c24ed5858f9e137cae142cbd9be161fafd0. 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/NLV5Q2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f2ccd92ea7e8d6a9f8ca0134d25c17528f2e18e444ec80a6c04aaad966527c. 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/NLV5Q2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ac185e99fad04e4c131208417489210c4fa79817d20fd1a65b078b16a0c920. 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/QZTAU2206169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba34f36eb3d6e2d441c7ba9f6f04e63fdf402b8fdc3a23fa1776cb3665b61f51. 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/NLV5Q2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9095cc4b88cd6f1f4e137f7c63a06c700d69247c1d3429aa291ed00406759e. 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/NLV5Q2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6653c7eaa2372a4c8cecfca32bbc00a040632d6cd311b0710d2651258e0b2c. 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/USLD91736458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5247c647833eefb0fa77d66f71d5373badc76d680fd21ba0d40fc96581af017. 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/USLD91733123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5c1df91f367b6be7cd0723c93f4266bdf7abd899f674914d88c25b71cd37c6. 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/FR9W12100846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc86d6052f64ac2cc94438b684c2d58fe5cacc8a52dd2066940a429e777d7bb3. 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/FR9W12112191.