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 0xc1dc4fcbeb54c99c142dd4c58fc9fee44c5e24ed15b2dc65ca9a06907d2e02d6. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edd32695-c058-4eb0-8c15-a7f294215e7c.json and https://artists.proofprofile.net/proofs/artist/edd32695-c058-4eb0-8c15-a7f294215e7c.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 0xad5323af4bae9e2e3a6aa743c7be6b13bf173ac8c8e095f83431801ee6ac4755. 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/QZWDE2400692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f39ca6946cbf8bf7977415a53988af11b1d2c0dede5c865fbc1b4636f52c4d. 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/QZWDE2358187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19625dcb48c5a1cea453cf2c171f6ad512c22e664891979f2244ec64ad658d59. 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/QZZEB2315552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aab30f05657489d2e419772d1d32da003a0a081402223334ebed2e3ad5650e3. 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/QZWDE2490448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b3043ce1d10a739bfdf3d754dac7a804ec9cedc4700f1ee65d6fca92b47fe7. 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/QZWDE2358197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54543df8e24725b74b283e3653cadd31a83f70ab218a1fffbf4987f435fb2eb. 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/QZZEB2315556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098ebfb861eccbefc5b234a93b5c52bd2df8551b2f138511d2b70fa6838e0bdc. 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/QZWV32476315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ceaeeca1e99ca8fbea4c5cae7678b7c9b3edac4c373b820331f616bf34f00b. 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/QZWDE2358198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6a23152763c1dd1cda1e2b5ef53ab1eaae7cbb5b575527394f3acb5ef252ee. 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/QZWV32478037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0aaad9694191946edcb171558da5398f60e3d16ece03a61ab6b0664b87c4f5. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:32:07Z), 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/QZWV32476310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc260132984d3a1249fcd4a5eeaf41cbc309a616c02c9d6de4f7783348c63b209. 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/QZWDE2358221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e10a982bfbe0e86d5f92ea70f0e2265f5559c5dfa8da362d7b4a56808dee7a3. 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/QZWV32435146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d32c6cfbb2aaed24a93dfd337e04566118e6f1528792155cbd91d70caccea8. 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/QZZEB2315558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9db5401c498d388cc378b9d51d6d9c9b09a2d6936df4dcce60cb1c4d85647b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZEB2315572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91a2c6efeed0a900f6fb405507660f632e2008c5e51ab6aebe74b087bbe7325. 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/QZ5FN2208615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19703cda1ee0793230f8658b21ec8cac62a423fcb4e7c6823b276e06e5c00009. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZ5FN2208611.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1314e4f3dc6bfbeb136cdbedcf0d7051128668969ab7aa86fe082602c5f1b3ed. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZ5FN2208614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe742dfc9eb92b9f126b510ce2a5ecd1023f096a5be56006eefc902fcb3a402d3. 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/QZNWS2102210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6d58fddbeb8499d0ebcfda9e4d3724fe4e5ca68fbe8939d68e56776275afe9. 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/QZNWS2102218.