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 0x3e49c2aa5f861be1b83c38668500ab3d2d24a3539998224977c9713dfd0560c7. 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/27cacc41-2f6d-482a-8d55-6622f2657b99.json and https://artists.proofprofile.net/proofs/artist/27cacc41-2f6d-482a-8d55-6622f2657b99.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 0xd0139bfc28b0ab6de9b6d126ae1a401b100488bca9a11413df157ba38b39cbc4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAEQ2029446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9389029782a79bb9a5a0643ac679975131bdc148d5fc189bd0f691c9179c6b00. 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/TCAEQ2030846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55e2a68020ad4a8521dc3b7f348e63e4b23250b2d77ef43d0e642cfc45b751b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAEY2092251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee207d76dd44a7580d6a5093442c700530bd2595a9bd54518acc3cbe27bfb58. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAEY2092253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb14551a194efc2cbb67961299ec2eb27417ab0cad97e9c1c0cf2f80cfe4c23. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAEY2092254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd806bd272bfbc570133205f5602882d1b79bf703c914a697161cb2c8d43a1d8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAEY2092256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6989bda2e56b39d89718ab3078cfe960fb869bacc24e757194c4f974f663b67a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAEY2092411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdc0661faf69d1dc39a2537ccf806ee8a7a9b950b2ef7e8f17165e0b7bcc26e. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCAEY2092413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cba319ef4effb75efc260638dcb9544dddb64141f893a1269523e7c892f92c. 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/TCAEO1948159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd2d4f278dd7821146d963087d629697c40146af39e89ba9ea8fcd287d96a25. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAEO1925058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89799c13ed63317b932872a271eaecf2c9930c8b9920ca2dd9767b6adf57f07. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAEO1925122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381b55f4cb53e169c5a6d9210dc1116adf2426d5eb81f2957e6ee2cb6103133a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEO1925224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a63e4357fcc53854b45ae3eeb01b42e74adf30e32c23a4dc5c0f531010cce4d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAFY2112620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348ff226bff2bee1c1ba26657758589dad3e1132c866a6b86654d385cfc80227. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAFY2112622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fe624e255f3221efdb874703897e8d7738194cdfc3c2ca80ab09ff448894f6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAFY2112624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994990dfdc28dbdae87fa463ce8f5ed6a766718049b378fd2c1a45b2e5d1a129. 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/TCAHS2361577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c7a1837f27288a948b674cf38ed74056f548460ce6c06aeeb054ad03b74d32. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAID2480268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd27d88fcef4fb9ed3c875dda78e7dce96ad89eadac2b8ab769300e1268b14. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAIE2480286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9b5b449c5a1d287913b19d8a05a02234dbf305e494ba926ade6e0c3e044da8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIE2480305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9eb223005bc191d32976a7caface9db364e57cc062aa9c66971afb5a14d0805. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAIF2411671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e68b84c59dae29e6b5ffb1f20d9231b0352e2ebfbb1bb9f9e99b0e730c27ff. 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/TCAIG2411696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdb202918bcf75f4611f4397aedcb7dd12b0cdeae888a3cfcc4e8f6ee33b333. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAIF2411716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ebda4610bfa81f4a6509b361b4f9643f32eac99cf7bb82be42b8ea7fd889ce. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAIF2411723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf930145101fffec87452cc6ffde066731812bdbbc17b199207af3ef9282c051. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAIF2411735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18881a3e18ebc53341fad306b575fc348dea24fa10a0fa1171c4003c8927bfaf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAJC2453507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4ee40d3090f015f9a819b37f704ae82e93fb8b22c61a97406a074f67b21142. 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/QM6MZ1818193.