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 0x93e1d7b2dd47daee3cb14967b4428c8059de8c83e5befa7b925f3ab145686ef8. 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/444a5f2b-c7bc-4cad-aed6-1d4018817ae8.json and https://artists.proofprofile.net/proofs/artist/444a5f2b-c7bc-4cad-aed6-1d4018817ae8.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 0xa6af14f8beed942165718ca958637ffebc16db0d03f948dd42bf55122580c341. 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/CA5KR1539510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeedf5495c56b8aa1322fd448be8a108aa60c81ec571172f12794b020f4cfa9a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR1539512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa200a03a900121266c77caf80ed6b350ca194eb05644df8d4a03a8b81ea3c556. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:39Z), 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/CA5KR1539513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c82a38a51dafcc23f1ae03e2c04e608478c22e47615fd2696d408c1d1692ae0. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/CA5KR1539516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a8170810194df296d1b270da38ea0e88adedbfb8720321e3084b7c84f23264. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:05Z), 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/CA5KR1539517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad428415c5e66d76bb089966a0302a6289a48ae6831feadef55c9e5f01900e4f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CA5KR1539518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac706710422f9487bbe5db02d91f35ee425df80c985a83a71619e851917e406d. 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/CA5KR2080007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac871582cc3bba37377495853deed5b48dd979d70ccc576f177b8015fdeee24. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2080009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee79016143f4a76e16bf0678367288216346f893bf0cc06cf039392a0f27212e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA5KR2080010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bad04f1691db90f6e7ddef07c1c93845556d75d7375fa84973765dbcf0d65fe. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/CA5KR2080013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9758d02a9f8bfcb6bc29e1392701eb3e1a23c03df1135fd93fa84a655e095dc7. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CA5KR2109710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27813b74d3042900d0aa282da501eb471fbb19f12e0e2c4f99397cc729d41dda. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:44:41Z), 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/CA5KR2109711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354df25c7a7a9fcd4bdffe18223d8c17bb2fff4ab4f12d857c8a1fb8aabc19d4. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CA5KR2109712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f8af2d02e637e930bd788e35169b00de62a06ace08a849bc5fa10064445ad. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2109716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbeef764c960ed4dbd258f0d828555b02a232c68f917050bd4b8be30511cd35. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/CA5KR2109717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f2f13a5c0e512f312ad0d4de5a075ef2662a45d616292c63757a9ce49c48d9. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CA5KR2109718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcef40db6451477fa9191d26c91ffea2e03ec08d3e128be27cdcdf9bf89f37b. 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/CA5KR2160700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b385c2fd2f11dfaa24155fcc8bbeaece75f625e98d957ae687a971c7906f2aa. 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/CA5KR2160701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb339fc4f9a3a7f3cb6962c79c30e040392f15dbac2789f7236a3ec2754c09c. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/CA5KR2160702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b639c25e4d3f85c46e321b0ce9c583af7b6dccccd28f3b07f97d32f184bd63. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CA5KR2160704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91c91e536eedfd732a7fb30cd76efe9791257d11705459a657aaac59f8cd88f. 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/CA5KR2160709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72468d008d23e00663b56ae8db14b794f31f1e1684f6e756e595c89aa1cc5abd. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:03:54Z), 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/CA5KR2160710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276848f49e5459c71bf37b6425b605c687fcd8270b10774c13adf27339d4a8b6. 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/SE6XY2536447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934c0b17d15afc89acc68c2bed823e69f1866711a57087247136eba235a0d6da. 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/SE6XY2536449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33950827b23aca1cd8f9d86b1792072cb2f45cd8c1ee5ed7128a488ff25e570d. 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/SE6XY2536452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ab83609fa478df91434febae78a00d4c6e42056860060a9999c93353e293c6. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:04:25Z), 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/SE6XY2536454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e6ae4a1d11ac6ea0fada7470baedfc78842faffc2c9145a4984aa51c55acb3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:21:43Z), 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/SE6XY2536460.