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 0x1f77fc90427ac2160d43e823d69c84b8e662a6925614a786dec1271c3fecbe76. 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/fc73c10d-ccf8-4be6-8fce-8001f2965ad4.json and https://artists.proofprofile.net/proofs/artist/fc73c10d-ccf8-4be6-8fce-8001f2965ad4.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 0x5983d0e31e897683f179d1db7c8be2d07c6120c9edf5d306b933f09b1b2a7075. 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/TR2631600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7339e466325fd38279fb508b1e89d63e348d2c06284b72d94c5eedce89c6fafe. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TR2631600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57c6a9314ccf4f876c6257b7606a193a61de6f70116888e6619f6131452730a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TRBGB1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c673edd3650d33ce733631d6eb7fbdfce3be0584dd607e2c94e586d441852c. 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/TRBGB1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa548a97fd5e41898c64d99030b4874a98c1db70e507529b02c7c51df57c3588. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TRAKK1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688bf439728c8427f4a411eb2164e723654f0fbc98952386bdeff7ad8150b808. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TRAKK1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb042cf1af876b46e5cf2ccc0c850a617c0091b2c5c9fc179a9f8eb0621acccb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:39Z), 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/TRAKK1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4800b770acf789737c25de57657e7364cb209880cc8dda8645bbcc84d78d7cb7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TRAKK1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ce56de834b3b6104e458ec5c3cd760dc2ecfb17772be9246eed4d2b0d0616e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TRAKK1900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bbc4c84d69e9584cd846be993b27401960cc9278419e36e432568c08f91808. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USA2P2362065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577f4e4b5f15a593a55ec8ab949e2dd8e9e8cd0c8c1a3ab2d6c8cefa881deaac. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA2P2362066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfb4b692f72ff1d1bbab9fb84e1da62f16d202fce6fcc9b0c8db7b18a2d607f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2P2362068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a58c7166718344a679e02d98033a5350a08413cb278f8dc476e5f99b43fc27. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P2362069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdb39cf5fb1fd3b1d1dd5ae3a497f52b52c45b611f81617c3ee57f1147b709f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P2362070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb372e4d4edae9320ecb35dcdcd4410cffd461d1862fa9bc52118f31cee902. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:04Z), 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/USA2P2362071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c0a7658405815ac331eb9ba30342295616636b3603759cc1df81ca0f9beb1. 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/USA2P2362074.