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 0x87252e1698760e83035efcb093140051be06e200ac489d3a17867828423e9c66. 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/999604f5-c89b-4afd-9b5e-f1436d3d2e6b.json and https://artists.proofprofile.net/proofs/artist/999604f5-c89b-4afd-9b5e-f1436d3d2e6b.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 0x0eeb1e50d36aa6f9ca48c9071dcbda117975a2e024ea280a680a785f6da06f54. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZJ72100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465448ca77438229c328f1998462326c66710aaf6e37b9e061f818e7e7cd3cd1. 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/UKZJ72100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c76efa8d834134b023c7994e7d3780fd4761f179347657846ed1210d80a267. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/UKZJ72100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e894cc3de908eedb1595f2e2734474dfa86d064970ae194f8f6c0591e3ab16. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:58Z), 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/UKZJ72100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9174061005c1e44d217577906b71fdf9eb7c95cf97d1d5ffc578b37b0aec7f59. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:27:59Z), 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/UKZJ72100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9d78d4238b2a7d801a0379fc16755f131204f6c575755a881babc10c4ee8fd. 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/UKZJ72100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46295887e19bfcf3449095a96a9088636cd5070f8474c8bcdd0aaa5c89145b8e. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/UKZJ72100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed9cec7e41656b5629a06d926c3c9da77f8d0ef3f5116a35d58b0c5bfb6210e. 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/UKZJ72100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f49fc37449829e3c9eb84a65bfc9fdb951f955abcda2fe2bacb5bb748dea981. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKZJ72100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf32f3426de3e349ba65a52fa285f01fbc04df336653237cceb2a84f27bd10bf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKZJ72100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf0eb5c588b543df3100ad264d7d8fef96592ef9181255f447f82f2a9abad2d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UKZJ72100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a2756329c1d5449663c2a576df19d7308fa74bb3e8f5bd0aec5f0203e69d8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKZJ72100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9852c787b62efe0418adf24b369255e179a2eea7faac7d9056739927619c509. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKZJ72100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdcc2eab7145e5f0b80e6cc522b3668ab710531923ff02d54906c8e992c6393. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKZJ72100152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ce3f201098a7c6bd6b8af95c7491ece2bcd0e8efcab222cfe658b72137b8e1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKZJ72100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48a2af14d70e35c2e03effd84d617e20a9fabd3cd149de28ec76d4b99558377. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKZJ72100239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc5c3b10a8e63465558219b3f1e8e59ef6e50866fa1c07bf086e01e7f0a5c53. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/UKZJ72100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8c47efb5d5730f8e57a705a5bd2896d25bfcdb45645f4ed26f48644570ec2e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/UKZJ72200985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8f8d14532c19bbf8224ceaf9c8bd2c14b815f011c38922592d7e94a40bc555. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UKZJ72200987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb540aefcf25c0ed6054989b3870471a1bfb4247a5e1d3e8fa47f426c7b299bbe. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKZJ72200999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba7d6301501eca9bb135ca15c29e652565d17b75920f47c1d01a423510b111. 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/UKZJ72400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9eef146d420acecf0b1743a4970d0d53d44a7fd5041b39c3a9009db4ec6560. 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/UKZJ72400508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e0480d6329abf3066f1b63ab177302fbe6b1129392730166706585d34559c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKZJ72400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4201069c98255ea8001eaa1c760734d5d5247f6f65ea2e6a422a16c7f78645c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/UKZJ72400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242b55035cc0f18548abafc6b66ea938974bd7bc4d62dbc1cf279a2df25a5f1e. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/UKZJ72500421.