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 0x7e54c355bd92fa50dca7d4edd0f82df613e4f38e9c3d9e339a9be41ad8721cc1. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e79e8a87-09c4-4678-9825-01f1bdf664b9.json and https://artists.proofprofile.net/proofs/artist/e79e8a87-09c4-4678-9825-01f1bdf664b9.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 0x8e8e39f7e02ef5e5e8c640e531e79f107c1b3eeafa462d07f67e2f718ca38213. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:42Z), 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/CBF8B2408455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f8cebf85a0f7c8c8ed29d55ca2991a080107e1d709a1c62cbeec5c5bd67a16. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:30:12Z), 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/CBEYJ2476469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5982fcb293b91e05f017360e63a32f1ef6763e9a1e7a65bfff39524893e5b77d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:59:31Z), 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/CBEYJ2479265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dd6ed3dafbb8a8e2ea1b51d631f5187232425c95d51882c73ad8f177964ac8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/CBEYJ2481794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4b1339431d0b3c2f1bcd9ec86e4b04c237a216a9a1f2cae553deffd804994b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:24:43Z), 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/CBEYJ2484149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c7060620c4a7c672abf7a3e11885086614c148edafc23c5922e1acaec033fc. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:02:58Z), 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/CBEYJ2488228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d7d89f607f5648df6b3640fed1e7947ed8fa1d1a7fd39af51befbcd061fe29. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:28Z), 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/CAHQJ2517859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd9d2ad394e1385c4fc5441fcf4f6956a5b4fa1dd8e2b62a1b7300e7f68581. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:54:26Z), 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/CAHQJ2553717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde593542fa58f1c73f1244f18a6a9bfb63ff5c31d6822ecef130445042d68c33. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:57:17Z), 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/CACWV2504205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef0d5f472577ba5d4e1a3d0b2e1603e816ea14f0a35793f0e42ee3ae85c4dcf. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:47:40Z), 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/CACWV2553506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e39f7e02ef5e5e8c640e531e79f107c1b3eeafa462d07f67e2f718ca38213. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CBF8B2408455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba37aec0f2741b145cf91c9c724723f7357448d6a1b969f3fdabf5b41a416ca. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/CAENV2587482.