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 0x1aad9fcb0c93e8c3eed558e27f8f9df8658220b1cc09dc3c6213b80b82b97ae5. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edb8ac97-9d92-47ff-822b-180b62851bcf.json and https://artists.proofprofile.net/proofs/artist/edb8ac97-9d92-47ff-822b-180b62851bcf.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 0x83cc720bfbb7964c5c3f19f15e7be9baec05c599dbaead8b6efabbecec4858fc. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/QZNWQ2408981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844bc6c0d0866934e8d8c7f63e45f1f3d59499259809211b6f17f3311acec2ef. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/IL1012500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35836466aef7b02ec5d0bbe8301decf50377e73b306d9f4be8efe867bb34acfd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/IL1012500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2130cf3206793548025425e285ae5aa8e736905415f4faab1ac991bd781149. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/IL1012500338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572cb3518a36ad15ca6764f6a44e3e072a94f58a32593647c62b57b61f0ed1dc. 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/IL1012500805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a934e492fa372c10a3e74db7de57ac69365992aa85873f2ead5e6e785414d6. 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/IL1012500806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f419e101c5c3b9ceac7353b9a5afa198b401a5242099419562267bb52780ea8. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/IL1012500807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92e940f902442231eb43f4f0221cf3dcb87abd8302876ca76a111d3b9052974. 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/IL1012500808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d1ce1c2b264a06e8a0b364a063ac7509715844cdc6557986d75e783b0d350b. 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/IL1012500809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d50552307bac482ec8c71f5c06a7a0294e15b77783e970cc1d361ad14b82c9b. 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/IL1012500810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85759a35ecf8075dc3c05a66fe5a4699ffaee011852b03aa0dbb0ed79357e67c. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/IL1012500811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c15090cad67e115b30d898b5c20569e3df6b45b038d56083f10c09ee45a64ec. 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/IL1012500812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec643dee5a23c3400b65b3ffddb900d2d034590daa35c73747df2f18d60bbf0c. 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/IL1012500813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d84eb06b9ad6a2b161c43b07ed1de68ea97319b561206c5213d35f9d679e47f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/IL1012500814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ae46a4750e10e5f09bdb2b26c63659f150e7532d6869f0b88af1629019d170. 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/IL1012500815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd515feae85ae997b9a6f742d013838a02105cd59bee82401d83b7163e2e27a66. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/IL1012501498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004ac2e75fddf2638860faa0fb82fcebf11d0cb5fe614412c031d5ddf6d00773. 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/IL1012502046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c892dae1fcaf0e45a4755b2fb3b3d303bbdef243875385de6b8006ddf4e878e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/IL1012502047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd28cf0017e63fdb163e75e2f4ae9b99e3eace1ae204fcfecd3701a54164c2b8. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/IL1012502048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45907afd97b81d076cffd64874c09e83deced3da4ad376817ef77588ef927d59. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/IL1012502180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ebf65bfcb5d49cf53de5d232d0b0de3bbe1e0747de3eaf5856956586a2d15. 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/QZFZ62572163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc4e084e1fd2216db005cb2f6315f2bf10e8c8ba6fde3ca0578aea61a9ba55c. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/IL5842445469.