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 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 0x358b93d642cd8b73de37a9f691945731554714669e9be8a88633f68662b78990. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6fe36d7-2f54-4a53-bddc-4bd76f7dca2d.json and https://artists.proofprofile.net/proofs/artist/f6fe36d7-2f54-4a53-bddc-4bd76f7dca2d.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 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 0x7e113242b86c9bc1377769c94c94c2a096244c1708a9004b31a1e115aad70073. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/IDA642506121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08fa39fbdffea4bc17984cd7cd29e17aafca5f2bf0815dafa2d7e3d228e31ae. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/IDA642506118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ed5d6c80b4aae2246a6ee949735863e0e32a46d417e4898145f0aaf3bd10be. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/IDA642506109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b4ce00a2c3e08737c1f24f50d82a5f7a5e1791f4708daa9715fe15011d686. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/IDA642506090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7813a05fbe07dc906981195a7b7c3bb337c0799f4bab139bf5319d2fdb673a2a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDA642506092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53b9dcf92a435592c006fa5fda0e354987e114e94546fae9fb4561d599ba0d2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/IDA642506106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04650899ed2cb89b1e60d4409750a649d861116e8e65c10a44030a79a52f8083. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IDA642506111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17068c9d32fe8f7aa8e721ec10c403b06e973d1aa49b96a0f292152561952240. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/IDA642506141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6355d821f3b1f4ed414889c4fbbb0f6f38539d5b166fbd83df5f38d36bf75b54. 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/IDA642506117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe406ea45ce8f2cd73a86eed829644ef522dd999de3086b56421eb2ea48e31351. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDA642506126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f9ca4e21fde58d9f62424f3f3291e03c5907bf604a34e749bf094d581a7dee. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/IDA642506110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebd2e5e8a784fb606c284f3cf5e409279437dea450d3633abe466e3ab139b88. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDA642506137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b22d61d3f496491e40d4d3cec05243466b402aa42b1e40fa02629d86fdb106. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IDA642506131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32da8a76ead97f83890d204c6e9bb61ccc24c6fb5b9ddb51bea8d6377535baf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDA642506114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39bf71c1a4fac7cf68c74ba74ea86cac323de0aea2555c9e0d66ba6d9c1aebf. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/IDA642506129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064a7ecaa8ff3e9c2a52ab3f8d43d567850b1ab1932645698f037306b62e969e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDA642506123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71992348d7c6969cf35f1fbfeed1666f352481715ea059f2a0e8f63d39a11964. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IDA642001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aeab025f9efbedc4d756a41a1aee63ac275b739954480e11928bca30337e8d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDA642506085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe7099240acba169f179b0d4fccd3e079b501065d04bea3a4c187dc5239339b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA642506127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65e3abbb76996b63085340e73b8a89131b21d27e98fa9bf778bc6282428917f. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/IDA642204239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf4968005bb3966dd57b9d060ae637a478aebead0c639191f9a3629f8fa9d4f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IDA642506140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebdd873afde40ce358446835c78d2dbc8556e47b3a2bbbc9e994466aa3eea20. Chain 2 (Bitcoin): anchored in block 958857 (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/IDA642506087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301fed3f24ac5bd81cfbf859c2f9ab8ecbefd7cbbbacff02a3496f5b9a56ee37. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IDA642506128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5c5f1ce0cb2c9c213d6ca398b0d0370b964b9c5eba0529677cf8d15148e3d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDA642405364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0457fc4bd42531423c7d68745bc771b1edd30c64e53035fee49cadc0077637. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IDA642506155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03478207c02abebf46cf647f1054ac95776fddb47b36dcf9e404f5028b2abaa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDA642506399.