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 0x350ca5e6d13bdffa855faffd3b3d75b44b7ac5f34a77477d51d21f8547fdb767. 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/0a0c5710-b46f-4f63-96f1-76faa49d013a.json and https://artists.proofprofile.net/proofs/artist/0a0c5710-b46f-4f63-96f1-76faa49d013a.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 0x28ee9d8b725369674c3b11e1b5b730044b17bba579fedb9419e66a728f97f24e. 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/DEYX82222816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a245937cefe454b95134a1485cc00b75a9aca965ecc7269f22a0fd6bcdea1cf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEYX82222803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9cf36b123a340d8413493089af8dafe532f1e06cdd0056a4e197d80b41dc55. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEYX82222804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa152a75f63c365a12449ff203d27173258d33b304a7d5c90ace3a8feb479254. 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/DEYX82222808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf230fb3f68499800efe49689aadfe7ab4df5be6317cf74823dcff429bd184377. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/DEYX82222817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a052fb434fe38822b869b0f013106ba22d27f53c3802867ab9216798b04547f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEYX82222806.
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 0x53505b35091867ebcacb03b675a2a8f36e966e1ac286ecc4c4027c399fa3cc4b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEYX82222807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9739d57303a686463a5f0baed8a620937a8336ab0ff9661c528520a070c29414. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEYX82222805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad084d203772a976fc0fcc9ada0b0c8eb204b845d8fdbb13262dd1bfc6cd1000. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEYX82222811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1e57f2f120a95ca426b67fb65580f8e36624559b5c5aeecab3386d54fc39ca. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEYX82222810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f594a3470a6f64ba74d37d7fa111910713c57829538413692347c0fafc1e4a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEYX82222812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6448777f73ca5d2eb94fb7484e738eee62aa1abe4074046b22ec3c152c51e117. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEYX82222815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1e1b294a77ade28a1e4ba998423861cd27b99691e896778383f6adc300655a. 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/BGA472430613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64814a1356fcf28a793030dfc5cd9f08d18544083edbfcbf61998647259e5c12. 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/DEYX82213195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa196629a2b0678105e3ecc0fbec7a770c2c4aa715fd0935708c185afdc0b14a1. 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/DEYX82213189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5614853aeb15bd760bc61c57e8c64be7d2b90f0705f374953eb6c5ad6c52de9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEYX82213190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f82b7bb8fa95335f77f96b78c50a9892e069cbccc27ed7acab74a2b4b2eafe2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEYX82213196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c244a988b5712bdeafa0a682049f80060816576e5e3c75f06b526e0ca76b662. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEYX82213188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c56ac5c81d0d6879bfe1b819f687ab0e6a52d5a6461206d6e8e3e5ce5f1ff08. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEYX82213197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088a05fdb4aad0de880f1e6316d7e783f512f331a372349d43a1b6d324f1fdd6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEYX82213184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0394597b83999daed265b5494ba5132b4bdae51ddd0ff314843a66518b8fa6e5. 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/DEYX82201379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcb4baf10e69c074ae11677db1f87e71558b3d6f191f900c8c1941b81b459bb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEYX82201377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77866ab80523a1472c3339cdaad1d1d093b7b6690d63dd8cc0d769c03f43421. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEYX82201385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87184fd66fe1f0d0fa9940465ac2b4c6a352231ed61220130f3338c88fb5165. 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/GX8LD2466629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e6acf10763a8757a9c6f24971e62bf8b42d1edd86e87312fa81e41f7341fb8. 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/GX8LD2446592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07606c67309239c2aeb5220fc468adebe85888227d8eadc867fd4915213c0c7a. 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/GX8LD2424449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9270806583671f596db187b430d212cfe14f91f5c0a3a11163bcfce1a83d7bc. 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/GX8LD2490258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18347381ce3aa020cb2d824df85e385b9095ab59e0ae1eff35f9fdc73462b51. 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/GX8LD2444095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5902b2d6f5fb08a4f6363a44b93684cbfa2eaf05c5016eacb3b873cf9ad0a2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GX8LD2427589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821ed0e34e5fe77236b380f23238b976abf0b453b83d8578e29567b64f186d06. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8LD2497790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f2c11950872fc7b09094f51818369db2789a9768ec712334c740633ef96656. 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/GX8LD2466668.