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 0xbf2de02316fbf6127380f59a7524907f1d002adee1dc1295fd487f419073f916. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/708b83f6-113f-4c6b-abbc-d3ed3f7c0fc9.json and https://artists.proofprofile.net/proofs/artist/708b83f6-113f-4c6b-abbc-d3ed3f7c0fc9.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 0x0d4407f93dcea7e4489323d927a018a4967231d2caa278f8a0a5a1387b856231. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PAGU22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7adb2a06c00fe51913e181230b2cff9294150c6164063bad95ff697348c82e. 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/PAGU22200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e815df4cea0f0e5bdb84d76f2ad9f43d4de94996f0d6cfb55d3a779220e5f8f. 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/PAGU22200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e4b8e604c7a03be7a0997790b8ed035f95a82933c31df114c90e1590c13333. 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/PAGU22200003.
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 0x06d8743d39640648499a251a7ce868dc961a70ec723cc9b7101b592deabcf0f6. 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/TLVEM2443363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad894c52a1a94714df62ce655027aa7e4b37a561ddbd209313008448fcb3da. 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/QZS642497538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24b71ed87a3f3876a91bef93347cddc7f138c1bd4adf69a49f25f56670b661f. 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/PACC22300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02952bd4c762f02041f172801c97e2a49eb8d821592b9d2fd8a09c70a7a08d8c. 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/PACC22300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8561c386fe7dc4dd63b6dc6c57fae15b0d623ea4465eb7bc0f8ba9366aeb79. 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/USHM20657838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514ce1e07c698503667cffcfac152635378ab45b6a53d7ea1de17924759d946b. 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/USHM20657840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f23c159480ee4982826bcce4716dda50cc08f6c0f57145243078e415609320. 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/PACC22300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee41e5b0d2fd829450efb8ae5892d9d54c0d3ba291fb123c903639a802e3579. 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/PACC22300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ac47e3fff163d1ca4953c9cb8f6d813a71194e943a1764a5026e5c54ea6472. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PACC22300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623ce45c7695801a3c81fdcfeee7507b38bfaa264effe23a45aba8fa99f7b348. 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/PACC22300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a79f5b5607b77a5041af378f2e43286877c18e45f225dc402a4c6acc50e5d1a. 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/PACC22300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa796e89748ac0406faddffc77fee53709a40acfdbf4929c3a088aaba49786136. 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/PACC22300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed777aaf4a05b3771f17bc04b2467f48a9b62ce2bcd7639ae11fd1bead933c56. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PACC22300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f021611da70de6ee22f2b8550cc4d1484471ca8111b88404d3d02ec061d295. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZPEW2591842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da04452613fc7f18ae9e9eda2a6110041320e1434ccb7fa32941ff87360d082. 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/QZPEW2521087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9484925f6bcdb485a2e0d2b61751b022653ec300a195e8844ad56f87bfb736ae. 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/PAA020800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0f890e2a678095c80a8f5bacee2f560548e8c8d8d8aad0358dafe0474cdff7. 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/PANR22300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d86ffe8ba33f6d667d420347342b31ad32194eae1125f035f0b997892878b1. 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/PANR22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d8d6b88849a8cad09b5a11d089b62d19152cef2272bf278ca9ba18db3e3661. 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/PANR22300003.