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 0xa283df4ad01c8d8aa9c20ce4ca6d17d3fe3a46f0c187eadab45f189e2a3096fc. 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/58866015-224e-4fa9-b968-79dfa2cfd0e2.json and https://artists.proofprofile.net/proofs/artist/58866015-224e-4fa9-b968-79dfa2cfd0e2.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 0xd5f6307867f11b71cfa4cc3281d13091860f1d1e3082b81624b693cd193c994a. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CYA221400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2049dbd5b8a65bd9b2bcbf63acbc1852e1c668cad8d42be09d532b96408e1f. 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/QZES51800613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6492297bad6fb7d23a77a01affebe1afab61db12aa49684862cbc8d8022b885d. 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/QZES71856448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8565579b180773ab3fbc51fc7cc562513d20428d2c125e32b622edc190b47486. 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/TCAET2040496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb44975fff7f1b1d3dca47617a94b0cea35fb8e36fe3b7656204a1a55fa357ae. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:36:33Z), 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/QZK6K2003859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa217b61f0888f09093fc1a41cf3e07eb07cd204744640169b6da34164b120836. 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/QMFME2096756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2c0ea3e0e4aaa8004c54e535b9293f4e50b1945f3fd42f2f87afaf803f2d1c. 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/QMFMF2024881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb136b0dfca6ac33f058552e91d52f5717169ee536c543161e31d046c64145d6d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QMFME2199536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e237780ab751d4ace0623804c927c90fbc4bb19ee3fafde50835601b8a21f45. 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/NLAM42100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c9cf0f3bc0b1b9fbbed2e8e11f3616de9eece53edab1f5f9737efb09c6560a. 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/TCAEL1912503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c6f6e6867d175a1ba3860aea201d873ba95904756f1f0e5162163f44d59bb9. 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/QZES91905145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b52f28dc7f8bfc78f208f9f78a2a79cf9374ef029caf158e3c920df4524f48a. 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/TCAEL1912550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533e8dd5a3ac880c972be061b89d8cc04646260dfc5b1452bf4bf7bc1a789ced. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAEL1912559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae68eba0fe81f30a440e33969e6dc930169507ea26128a9dc5706215c0dc6a6. 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/QZDA81983796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5672edec4e3cd78480a8f353cf3541796c24489f5187a91c53051e3b4d29fb4. 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/TCAEL1912572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de582e5c85f3f41d2dbf769c5a219aca3457b491dcd7fdc29996fefa895bc8. 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/TCAEL1912580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0c12652df32c9f6f4123574bcd78eec2f9a1d6eca20703a5a5e4e6cbc7b26. 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/TCAEL1912582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976b91ce28dc25fe237bbc56ccc59cf503fa1d5fad8f4ffd16bdf81c10fe6bad. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:19Z), 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/QM4TX2168653.
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 0xa65941bb356851d9689cd30657e9d380656147e0b233980f738dc892cdd9e224. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRX452172238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76560505a67e3afef522a650d85c4f709976151e434b4b20df791c5347b33a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN41975622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac3cb4c7506d7ead01b9b27b0b3dbcbea174be0afb3f041724e3b44022a57f2. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/TCAEL1912525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a8a457214aad75014d537918576de4f5712581fa303a7a94ea5a5ee5d80bb4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TCAEL1912563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3c758274dd90e3524b5e069d4cc3214077bd61197a052954869f7a9f9ecb38. 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/TCAEL1912587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4f60ac567befe6c8c142c51089984b72346fefed1ca953932dd9e725e7232. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCAEL1912589.