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 0xf6dedc96d68e055eced29e83595bbe22db8cb6d543abe4f1dcdaf056f580590a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a177ede-91e0-439e-afca-9055d7b09b32.json and https://artists.proofprofile.net/proofs/artist/8a177ede-91e0-439e-afca-9055d7b09b32.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 0x629d0c38b51bb42bb0bb3c94e1c33ca6ca17c3570aa276c0ecade0bae21285c1. 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/TCAEH1917931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21be8c3dc13e604163631881b3989d5793907ac58321ca75fa8efc8407b08db2. 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/USUYG1247169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13032c7a02cccc4cd05c9a609dc50fec9f65261bf1dd0ab81d8336dafee214b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1232023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b021673e916785678f8de7a731dc8cd77edd11052f09611cf1d5ec20ec9119. 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/USUYG1431181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7765ca7ad9cae5b61c44615c926a874f814221e3f1987b84d98b9a38269c32aa. 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/USUYG1431186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9b9802791514b097539e3591968e4ed4aa0ecdfc339f319b2fec3cddae53bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUYG1425572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ae5aae7889772ccb770283f30d4da03689373b9dbdd51f93f52fb960e7c86d. 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/USUYG1431189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240cf8d2db655c66904fb99e5ee401eaff7ce6d3b62edb9df8b514bd70bb13ac. 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/USUYG1431193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8130bd3df07cdb6c3c0bd9ec9323b7ad077c4f89ee8e4019ec9576ce9e37e1a0. 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/USUYG1431194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b021673e916785678f8de7a731dc8cd77edd11052f09611cf1d5ec20ec9119. 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/USUYG1431181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7765ca7ad9cae5b61c44615c926a874f814221e3f1987b84d98b9a38269c32aa. 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/USUYG1431186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bad5a557a7e4833db9a420db8c2446c09e1e019702c3a1a8216227b75edb3d. 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/USUYG1444502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f42a7cdab16fa02836cf2827e435117ac024cbe5506d9669c143900c39221a. 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/USUYG1444504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f49d2aa33af7aa660a285045044afe0eccf7146522aba23fb7d01f9987cc62. 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/USUYG1444505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359386a6ac9ca8ee42f798e526ce1bb3cf23d1b107654db54284e3e989b9c04d. 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/QM6P42011671.