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 0x2cd33cfefc20564e7827e6af7fb00f56ce6a08f802a6af3bcc54fbc9532dd082. 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/cb2f6af3-f881-4d71-bbde-61cc05c68f54.json and https://artists.proofprofile.net/proofs/artist/cb2f6af3-f881-4d71-bbde-61cc05c68f54.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 0xda1f4fb1fb3b5128acf820134fe68cf23fa46dbdd50efa76b0b70ad2428dcffe. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X42392870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0253a60d24eaa1b3a60fe535a8a95ae58fd358f45c4b25138c36a62515d6c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732285928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456a7390cd073729fd96fb8c67b57baade59eb8f48374633843b834c1c8ed42f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG731750042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf42106394a9c1bde5ec8fd8eebc04ec117584a6786d0238215444b0bdc7230e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG731726636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccd1afcc526a380dbfb6b5929cba32c05899bdf987e5fb381a212340ce0dd6e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJPM2401964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deb0ded94950aa41cccf855bdb994b83e72508a7ecf7122d7941948dc0a9056. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKG732149441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc94edd0498c5de44b81a8685ca2cac5f1d301d5312e3a7b283c0b37d00b653e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732139707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa863153b1a5b2b13ffda63a7c4510f3aff81fdea2adac44d8307cb29bfdc59d0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732147693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a9f0b832832c5abd2bccfca102d81ddd18459f20f89c12e8385253a14954cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKG732126970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e48097fbe431ed7fb8002520e0869a5312c7752a60a272e85977bb1bf7391e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKG732108613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a08e6d59cc247fd4a0f0df4a00bed9d9ccb6c584d3bff670f32a942ae8fc7de. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732030268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679d36169a70dc92d5a0d9aca17897cc699122f067e992adcdd7a7d7577964ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732027585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6991a32a1424922db35654bc4f75588c9bc540f1e94921de00b943de782efa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732026888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d56546cc0adfdf80cf37c7eeb3bbff6a6a02531b68298cad75a2180d819fceb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732023683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfbf8f135e623e2c843e5db0febf2da2941258efaf451cdc02bd60d0b7fd770. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732018086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8977aac32f949cbb08db7396d9676c2afd191126a62aeedfd455a1b0b2e1a993. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKE022211861.