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 0x14d0c839ece4d8665ef7b75ee1ff6bdd340bc736bb8c85954f8dc0e997db4e4a. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4562542-5713-43a4-8ba9-0d7073545408.json and https://artists.proofprofile.net/proofs/artist/b4562542-5713-43a4-8ba9-0d7073545408.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 0xb49b9c711f9d6cd4373eb487921cf18bee3c131752572683768637d71bb0f3b5. 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/QZHN42340637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69e910f2c1af558329b393b6547567d47a4c3b3e9f30bcc7a4800f5461f7833. 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/QZHN42340638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc62b5f2bb79af3c622c59711f6a83db2d07e4fb4506f626c543e6afb791eac4. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHN42340635.
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 0x06290d7e18bccf6d2f8cd3c02bbed7258564085a7bd66fa135de7fe09dd8d1ac. 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/QZHN42338840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5b53df4ff008fee8e1a061fa17cb9976f4be2b6ac8f769af7c2e39fb72b0fb. 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/QZHN42338842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3132f331f19a9c10a7233bb9b14c1e7449a3e8fadbf31526179a8bcb84f2202f. 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/QZHN42338843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e3aa414fcc27a81d4678fab9a5233d6dd05d6351c2ff4337f4643236bda9e1. 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/QZHN42338844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f8dfd2f7423a4df5f7082b94bab9db7f1a4c61ed3e1cb925d0b72c0544f6d9. 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/QZHN42338845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c34258f7182004ffde3f59a9c2b35fbd816a25223651ae2e44c8522b9340f. 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/QZHN42338847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ff0edbb685fdbcc799c72207b6463661f3ffaada6f81ba90bbcdf22b431f0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:19:49Z), 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/QZHN42338837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc364555dd47aebdc7a88f7f4648f8a84c60abefb32d75c64d16aad88ef22016. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHN42338838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a4bc349bc00bfdb58277889300f377968f7b49d79219304c9c0e28b4d36cea. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZHN42338839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94048fddfe40f5a768d3291c4b96f84ecbf58203a21244ce610ae877d8a04b8d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN42338841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708042d8405896a65a1affa162d7a893beda52de2e562a3ddd6f5f53dd591b00. 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/TCAFH2036702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6441e6d834a62958e3e4a22a7853b0d23ab703015bafb558d67615cf199b187a. 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/TCAFH2036712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bd57f6e7cb88c807a601e5e82f38801881a900d0e5ea287c57d25e0f799133. 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/TCAFH2036721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593d6905604724d1987d29c5210ee7da18e2c27cf0420f2c7996231a0712ef7b. 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/TCAFH2036728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d9720a8e3a231f6c54b6dbb4a79b841bba0e78a72254154e6371bf21973dc3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCAFH2036718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e43b49c29c75b44b268d97358be3f66bf9317680f2987e734d7e78c1ee74e. 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/QZK6G2116188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b38693758bf301969f01f978bed33d7cbddec9c776d7a593b72c25ae841d1e. 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/QZES72185936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78670e6d95ab978bb1a399d265fc3dd92c038e64043cd3cd770090f6c9aeaabc. 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/QZPLS2132294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e3bf47d6c74589a32605a9f5d2ce8184f2d3534bbaa2d43e72b27ce320f4b4. 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/QZFZ62244783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a9c6fb36631fa271d8758dec3440f944594cd61df355175c9fe5b15795ad71. 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/QZFZ62244787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac2a3fe9e7321f87b1f00260b86b126e7606bd997f612ba1f481d9d45700877. 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/QZK6M2127537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cac7a991dea12b7cd6c41449e02e5685a46e3cbddbd4691f5a0aa24b18e8179. 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/QZNWQ2389827.