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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6eea9ac34cf3d32658d7b0746c13301ad58fc527438e60a24126f43a959a2e. 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/32299461-ace3-4ae4-8875-2b663f8c2caf.json and https://artists.proofprofile.net/proofs/artist/32299461-ace3-4ae4-8875-2b663f8c2caf.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54cdd1fc667daf4f58c00259dfd867c87ff9bf3e4d573d76a86138793233693. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWT2060372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837bce4af4a4fac66b30c274b2f9079b4417f0aea818db26ca52b973c3f0a08b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZNWZ2055094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf63881cfe883c36c93269419825eb11ae668926d0930f9c69f4835901bf598c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPLR2076538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47189f6b6392402a40463d7a59f6ea3395929fd5076f4d2b8556258afb00351. 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/GX7852401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7c7dcc2a79002e7f5d22141d7e53f7ebbf7da40cafd9e162f1f36dd6715042. 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/QZFYZ2215044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e92211d3e1ff2a08b61b360037f5c7ec24749629d0277c9eabb2dd383790289. 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/QZHN52205102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe378eb4890bb39c6de00f99d46ab2b301aad67baee995f1407f8a2757f078420. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GX5MY2203541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7633a06226157d5e8a5f1386e1a4bceda0e0ec8a0e14da218e2a0c03d8ed89f0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GX8KD2243985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c07f671dd266ab5174dd296f3013d5e70ec6ccf32cfda47055a4ef871c3822. 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/GX8LD2286459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dff221d819355bbb51ed6ea39be46ea36d679c0f5bcd26607e85bb4401232e. 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/QZAKB2303965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b341632e2b4cdb93485ef0a1584e2658c28ece6b66670a05e16eab8f495696a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZAKB2323681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe742129e8fd6655ea50d980c50ce1034f89bec19316d5949e69abf641a9e3edf. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZK6K2337794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9dce1e35cf390b7bada73dda2c22d4a19d246b16b50e384ecc6918688d5bc4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFN2303975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd288049933036a87db8560be3b42d8e62d40656535bfe8e88357a95e145d6cc8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFG2467123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb257e2b2030b6084665fe93e89bd7fb54dce8de24d487f74eb23790c06bcc72b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZDA52501008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3c18ae2c6a364f4ec14143143da28f0c85424301d2e2114651c91aa588cee. 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/QZHN42508093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a448d951d21939ea310932aa1e6de586cc9d9097a3386eff3ad743d416c1744. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN62566083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac17057f8467a85f72d51ed917e95fd7706c60db80e40ee37cd686ab0b4f3d9. 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/QZK6M2599161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819739703e0962a00ef7ad41d5fd25eb78628c6c4e82e78ab1910d745d37a9bf. 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/QZTAS2570737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3fdb51d0efad3dcf06b9b8bee061e0cb098246b605763beecf6c2befa0d75d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZAKB2529509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dd7d913a2242f38e01e0e1faf844fc154941be4f058e3412d362aa6662eb9c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZAKB2535298.