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 0xb01ac111abb0dbf7de784b29b00f0a2c2d191f8f825d0b0fc22d39502e794004. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9b0fcdf-d9fd-44f4-b47c-62779c4fdd1f.json and https://artists.proofprofile.net/proofs/artist/b9b0fcdf-d9fd-44f4-b47c-62779c4fdd1f.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 0x71a3404b4560685abcffd327a53d7179a259d8e8d54843e981632555a3de4bb5. 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/FRX202123660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a937686f6cf34dffdb29ce82ba807ce80334a27f8f2185eff600dd1b0a95a. 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/FRX202127185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ba6054b8912cec298a4b6fe73ead48c1bf724f4baaf985c1a9238a7e984f35. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX202127200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15872de0bc8d994e0ee6a62c7f0728ffce1f0b7b360f188fa1ebbb2970022b02. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FRX202127215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0621071aded5d98ee983ac97658989ea9c38a3f979464c55780bcb0249237cd. 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/FRX202127201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9069bf0f6aca96ce1fcd8c5c50199fcf7867213491139a1a8092476bd8b6ccd4. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FRX202127202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c7abdd870bb5475f76e7bcada25be11810e9c398bff8fd45a5043bbbe0f2da. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/FRX202127203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b475d27774dfeea0cd2831fe1e98daf9279d153febff511e07849bef1f5e391. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRX202127204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c1c3b3958070a9035d925ce02578d782482f414754224c2a759b1db4f0d343. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX202127206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb5a12a25835eb755a2da0e4863cdbdcf185c8aaf08056c8788450d6860b3fa. 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/FRX202127210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42dbef2c8fabce016f21722cb0bd1ead350d1994bcb3be1988d346629adbdd2. 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/HKG732014755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf070920e43e70dd88a0b3bbf68bb6e61cd07429cecf4050fffed297fa6d3be. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FRX202127214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e11da6719375c7ba25b79d8ce00bfaf64bb075afcc75fe4e668ff9ea7c2d99. 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/DGA0H2497122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdd606ad2a08159b9e5574b13bb2c2cbb4a9a4aab76f5985886ff2e74699b8f. 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/DGA0H2497123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c9ea85b7765eff92afe259ae3e7392fd11282f04f4481a3ed60d815feac994. 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/DGA0H2497124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638ecf07c509b738fa0bce12cade7a5f55464dca0596504965bd6587e3ddca6. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/DGA0H2497019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf35048e44723b8f9300856e91239dd5dc22c0726373f7ae7725448f0ef4d73d. 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/DGA0H2497020.