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 0xc300667ec40284a951bfa806f90536a1f26044a911aecc82519ff74505cf93df. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98bcb9bc-bfcc-4652-8369-c15093fd0ce6.json and https://artists.proofprofile.net/proofs/artist/98bcb9bc-bfcc-4652-8369-c15093fd0ce6.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 0xe80bc3f5fd66a53b553da6d3fc07fab8c5dde9ed21cb5410ae24eec6a70f292d. 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/TCAJO2520117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8db7fb8d86196a76b6d9c816288fa9c49721e87505eeaad61b84432ad3242c7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:41Z), 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/TCAJO2520137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6e9293cfab0521791b7a0392b116edb134acf5a476ee6098a08b6dbcf36576. 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/TCAJO2520216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6309f2e1e7dd1a5313016223719776f4a66695c426cc6f4d483f186661a42fbb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJP2520223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae21010a6dd04fcb0d1a0989e4613004982201ec3c2dcdc6ad14d29c78c98ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJO2520231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c500fa6c2c916976831e99c85859db366ca8119f638c459f6d8f233a1682ac. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX38U2495017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a632aba06c46d0a22261961b9c5b0b287c574265eb832d05f3d2aeb9b50e9b. 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/GX38U2468852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2feaf84da99e53568860359ff8fd6df20310d56ea88bde0ccf93969fbddbad. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAJO2520385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52ab863fbc31ac06edef83bb89840567d66ec2efaf118b4af9f1065a3a80d48. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJO2520406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22006a7a13feb0ba4a651a384aab9c1ede439511c8c5cf56083b435dc537826. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAJO2520448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb83746c797c5a966c4679735fda1233d138263374e4dcc06869703de2509b77. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:41Z), 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/TCAIL2436000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd360daab6d296623ddd4c829a99e80209476d31d17a1cc686640a4bbaac04fd6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:24:23Z), 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/TCAIM2436006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476eaa9b1f4eee8e49ef4dc623e83a336dc74db7c1d19b8595d1186b192c27a6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIM2436012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e816c8da31f49c409b52dccbf53e7ee0cbd4eea3b296342ab6f4256550c5e0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:29:54Z), 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/TCAIM2436019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621bc23278b0aec14eb2ee1d287b12989bd4f145bda7b3489c1a564ad0e5664. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAJK2559073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ec83f8e4c5256ac83c7733a8ef6afdcc98414a709b495c99cd1e5d78a1986f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:48Z), 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/TCAJN2540141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4774496922834eb7288e390ee92f54ce5c0859fb837435302e99f9a6a0859a08. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:57:00Z), 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/TCAJR2550882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea03868761789dec2243d50d071f3a36b2eb6f387fe36fc25aa9ebc30306384. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAJT2598902.