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 0x5edd44ddaa0d4cf3dca12d3560c7d6b7ab26aeceb7713dd42d6742f1d9cefa30. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ea10864-4d2b-470d-bf1f-4d2681c93a45.json and https://artists.proofprofile.net/proofs/artist/9ea10864-4d2b-470d-bf1f-4d2681c93a45.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 0x8b9fce948876d41d0f3cd455b645dfeeedb56b5aae333b27111edb6d57a9dbdc. 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/DEBZ71100866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3ae182a6a41080c074eec294d83562fad8bef553194a31afb37a7dee248df9. 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/DEBZ71100867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4982bfba4e24c897bf11806aea50d6d88513381f2d4b973027cd9de396d6ddf3. 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/DEBZ71100868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d2bc6f481ce397e8fd4c82fb064f745f703dde710ae3c18ea2ba2af51878cf. 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/DEBZ71100871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9385a7b5a7141ef1cd9eea0e1e051dced4f2d5958ad7d51e172e15c1b2d5974a. 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/DEBZ71100874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6d98fdcd411d220a0b4d75ef7489d09e9082a4c6ee78e7b76e6ee2c7e9e2cb. 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/DEBZ71100875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387eadb026bb36a6e25824f99d5ca458c0af4e2ec92a24e65c57581812c46787. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEBZ71100869.
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 0xcd512a0e3c8dc4159ddf6d4eabd3f73aca9dae748bcb0866af7885916f46767c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEBZ71100870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2925f3478ab3649f9950aa3589a093bdb912993aa5ba88c44828306b55ee6131. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEBZ71100872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe82b195298f91c642399d7be729ca7ad0d3876e7ecabbd40f63b6580534f7d2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEBZ71100873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c3fc8178247e638fa0b64c8d5f5c47b5e0600d78259b036abcb9f205465e81. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEBZ71100876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747ae8961dc8847e87ba9ff8e46da9c0f47188c145c81b2dc8dac44e1dd1592c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BEC260932602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8fe8a4443b609ff4895fa24ed24a217f5582809eaa461dca7d7ceadbbae8e7. 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/BEC260932604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dea484e551f9b59fec0363c94bd1107dde9833ba12c4e986267e1a94334b8d3. 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/BEC260932607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852dbdf46062bb932e0a067117b866b1e52eb43aadca542045ab02a539149678. 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/BEC260932608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5598ac80c01ffb02dd3299ca500b03061b3d1b649697518b3c7928b82e59f4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BEC260932612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f21e7d8d7a3003f488da4b5fe8670e58472ae83b390e36fcbc24272cc21ce33. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BEC260932601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a72235e3f262fbf1ef9e41e5c475811f814758aeee3fa6e943119964a33b8a2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BEC260932603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a5b7fa5c58e6e870ea4c4b28c3c2a11d860e9ee05da48cca78a8c66353bd7c. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/BEC260932605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfb2911dede0d97035ec6a021e7f7e30f4f11c854227f8f8e7e889f36911409. 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/BEC260932606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ab46b811057596ddae7f44f5101570eba48a95088d7d1b3cfe223f2bad5ca1. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BEC260932609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f515c3772c163689830ce397ed996d2660d337c4eb844cc59128bd651a3488. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BEC260932610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f7e07c74b97cefc06d344b2c0095e1b63c9da6d2806454ea35d7fd8707b3ab. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BEC260932611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844d2b5b6c08058ec9393f980d2aa6e3c4b868483f534a98dd260f1b2e97d4df. 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/DEZ650714458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e47b9bd0dda1ea048b4cc1724c0743b36f3cc464600d1081de0ba97d6994413. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZ650714459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ac0ca6a952486d412c9ba0bb3e35db9a71bcc9b3247829f913c997fcccfefa. 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/DEZ650714460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89608331f2d22691ebd3804d6ebe787750dbd31a4f9686c4e0b5d0c9b409a310. 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/DEZ650714461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008de4758f30bbec38e3d42605455487bde4c81c2db666c31de5bb201d1d56fb. 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/DEZ650714462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6355a950e02d69c31c776e603eb97d66a7f01d9ca66dab53373e540acd4e6f25. 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/DEZ650714464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947f79e7c2b21f9cc09a8522088512561b64bbb97b28f1bff8c4dfe952e1cd18. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEZ650714457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f7f54ff2e493f6c3051d49ece0a2f4068de927f9682351f17210d546dbb8a1. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEZ650714463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee92f133c7e61719a34e0bc57e334c0e441ec759391106ab347496b209f8210e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DEZ650714465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3b0a6da2ae689d5835c8373205d146030484e34d7f7751c3944a016e456e10. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEZ650714466.