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 0x5881abc9e9fc682c11215ac20e8da3aa2abda9ddbce90f842a3dac4f01640d66. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2a3a7c4-eb77-4842-8e0d-3331945dd77b.json and https://artists.proofprofile.net/proofs/artist/f2a3a7c4-eb77-4842-8e0d-3331945dd77b.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 0x25f9e9b11efb9b32843543ccf9254e40416094e459b20430f5df979517a2b84f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:16Z), 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/GB8KE2414659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7501235202cee1148f48269ec88530f56a0d5e042e1a2bacbcffa045f5496c9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:49Z), 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/GB8KE2418877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eae821ce469e80c9beaac838ace2d50b008c22d08ab3b38f47870fd6d46dce. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZYD92404328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7f31a25b2240c964d2994aa1fa9e82b355431bd329f97d917975bd2263d55b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:19Z), 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/GB8KE2426035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c1b3cbbee18f9469c85939b14f48abb274fafe010d4e7966627a16178ae692. 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/GB8KE2505133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc1308cb648f8cf72b213720743caa1dbd642186b51f9c0fbfaeef53b3862da. 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/GB8KE2501735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ac6a154ba75bebe9ec5a797f154083168bef8befc8001c2e98580fbd4bf8b8. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:59Z), 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/GB8KE2501737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c03ce2a8b37694866b2eb2135e1ff7248da606eaa9753ae6d81a730511675. 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/GB8KE2511753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43368f3671ec92d8ef07e2750bebf4e2b9e0f7a955cd18498363ca8fc9aed12. 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/GB8KE2514496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d679874ef59e34ea6cfaaf31494645bf19e069ac2958b84e2c7c369a4adfb9. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:29:01Z), 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/GB8KE2516139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc32a83c7cb1839991ce38af41e4e26f450363fd8232f1a665eaf727e5cb4004. 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/GB8KE2516886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe021b73c55a230d7a49a26cda697b345979e0571c30bbdba13ee3a9ef40c30e6. 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/GB8KE2517487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720d9e64c9728ebea598e6d9b4bf75a21a8245fb5e81dcf898d2b64371069713. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:48Z), 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/GB8KE2518756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dbb65dbcff00f76c2cb31b6c0648d58a828d2107dcf69c6828010fd04e445d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GB8KE2519784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eab9776ba61568aa409dd53b1f7362c84537ac0e2beb267f4568d2899ebcb65. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/GB8KE2520640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3cf4ef110af68f0d56dd246b9ad77c26ca613d5fda338be1ae1572441405ae. 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/GB8KE2306197.