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 0x7bfc6a8fffca4d41858eca23c9209c7696f3345270352a05a1cc65b20882e709. 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/84c3a489-29b2-41b8-a6e7-02359678e636.json and https://artists.proofprofile.net/proofs/artist/84c3a489-29b2-41b8-a6e7-02359678e636.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 0xc462f7af39b6dba9896782dba7cd170ebff59c31ebc8fb85d20104843f795b8e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJK2508716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e5b2724780dafe0c4dbce6b785f426c93470a71d3d3779a55966d458937711. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJJ2508722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd87f28f1f6c258aa11ab198142c1be8db17c3b3c0888f69f92ea6c1b686b35. 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/TCAJJ2508725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1e28c8d3d9076a72d140547ee1f92b7e55f3c6e2221cda66c71f9ed8cdd09b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJK2508736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bd4e6ba2b95cdff88704e2ed503a1b0e897862bbeb5eabc3420629b078ddaf. 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/TCAJJ2508742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33507d744ad7e746a20da497e8f319f075dadcf09d7bbdbecd08d08e3580ecb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJJ2508750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dc91d0fc6b53a212c41addbb91b82167e21de6de09cb26f320b76569a42119. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJJ2508755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a964ccae21902a5f2a3ffe40922952acc878bb10dafc160c902fcc8a46d774. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJJ2510458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab5f098832ab2f1814f5d8284c4e681d9ef8a5cee42a663fb255930ed4c81c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAJJ2510477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a899142a227fb6d9ae5a3157684455b0a4c2071eb4565411a5da80aabd1e156. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAJJ2510484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1091834d5d99453021203e978d849e14a01ea45039a764010ae1ce35d8216c58. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAJK2510487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e9cb51a00d6c7c1cd2915fa63170d1fe01415c943940d00b27f1613a0ef915. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJJ2510489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43aedabe5c236b43ead660f72fe0e329e1e2429b988d42449b58a605bd558035. 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/TCAJK2510494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfd81e1d41b19f49958afe7ff68cd07ebea4515f7ba3f58fca2b6361c72c9ab. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAJJ2510505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eb6482def803554067d2ae9b72a37bcfb76c4153156d9b7e9bc08824d52186. 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/TCAJJ2510507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbec04ed1c707fc4825d0de8a684cc7535983df8dbb6ea8b68a7f7a440df2e7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJJ2510518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74b9cd97581f45b37950ca4946325039ae84100d24c8129248d2432edb4484c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJJ2510527.