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 0x250ed1c40642287f627338ba543d33ffe4bb161e45806569cf4235fd6cb68c68. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52f64d3b-2f46-4ddf-9f47-8203322e72a2.json and https://artists.proofprofile.net/proofs/artist/52f64d3b-2f46-4ddf-9f47-8203322e72a2.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 0x07f994221cb18d33475d3abf89f6f3184af5cc5211fe596b8d2892d5668b40c4. 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/ZAA012000378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea9fdec6cd85f9af00c7372e35dcacb062a5b0cde9533fa53b25a5d90647d36. 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/ZAA012000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8cf45479b3a69e8eb0b6892ea0eae002491316880d672e1537e2e5d6304847. 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/ZAA012000380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb625530032624b62166a152679ff26f764e26a1136dc0c5ce131faac320a3865. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZAA012000381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b717cbb4235ecb52127b9a2c613ae07db57069e73ab2f00695be145ad7cef8. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/ZAA012000383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea433578038f1cb863eba74dda632ba3c312c779bbda28a902241e62ba6e102. 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/ZAA012000386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dd8858fd764f5989a6b7e1fd68f252e2fd6841d5722297176601426702e5d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZAA012000387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c5cb5a0211e117fe359e92a5da2f6107d98c57aefb91842f2fc39b34b3b0d6. 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/ZAA012000388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acb98b6a7b69571ea290fdb592fd77d0c0ed23e3cf52de5bcc8eea4cc542202. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ZAA012000382.
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 0x533f74d3886d0b8686b67f29ac3718c78fd89be03d67922b3654134faf19f596. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAA012000384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b231de267bd0f9951972da2fabb9149d70c1c12d0e80a2effef4739051d5169. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZAA012000385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fadb8ad92c709adacd6d80a7dda7708516f2135bf5b3a913fce3effc020d1f8. 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/QZES92069111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c09ac073ae8004f38d3a563aaaafaf8bf9d1df541141c10fa0ee1808633919. 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/QZES92069112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cd9b24a5a859906f2a40c27c99c137ee4d149867879b2630653d1997ee112a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZES92069109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7199b872ba55d9c6452180f65fb490a0447b72337ece50f15a5d571fae9db630. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES92069110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c735f99afa5c0a54e7abbe629f6eae3a77b58f485528963c2f9be8a2c3b03b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES92069113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f5f9f5e0f1e1b8055e857ceade4e32e6e77032d613f8bc33b225dff2a26d8c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES92069115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692ab4a417fba65949aa82616a48c2e3d84bbb26532b909b465be2053b4c2dcb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZES92069116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897417eb3ab1b48ea9e58d157ec2afc9d38197ccc53f41e61d18cb669f763a2d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZES92069117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ada0b509031c8931d51d5435bad2e5bfa8b659dad36d8946cdb26f51ae1469c. 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/USCGJ1810722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0708f0734a39dc1af932647f36f86ded16337568e8d4d1078a98d2c660d3973f. 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/USCGJ1810723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82238a903d3d92c0b2086e9f3431875fd1951cbce9a533164047d7186d13dd44. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1810724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6c6c6dcf5cc855a1216e5a45a892b03f193567d5d3033dc00c76ae54686d4b. 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/USCGJ1810728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9a746b4afb201fd0953c1a3de7c9539ed19f0b22ec99142a5e3d01cb13ada. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USCGJ1810725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe299543396273dd01c50b0febb8ed8c3020b9db265aed2d636588f13680313fe. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USCGJ1810726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3450514cf994dc05223e35c691d4d81d51c9fa06542f745dc72c857ea1e8948a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USCGJ1810727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8f08a42ec8cc6baf9084d1eb005dc306f3c474d6560ba1e239a523129abc13. 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/ZAA012100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf70fbcd13a335af92ba6775a077166ee05a522fbcd2c4b20d019cf40e6a7f07. 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/ZAA012100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ea2e038170baed5554b523f8f53c332e23d3ea8008b8aeefdd6cfa53d3c73e. 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/ZAM5Z2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedd9db515d9dcf20006df8ae5c7fd4d2acb109714b0b72535555eeb3e86d360. 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/ZAA011900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38791e93da9927161ec0b4c21413fc05b4dccd28d4b517f77d0e0617e070dbe. 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/USCGH1815813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892d9b9e8301ebefb6159ffe626ab81447b67a6716c72eba6ae02ad14a46dc15. 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/ZA0I41900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3083bf40cb87c4e1be001b272df5ebe0190a3230dc8dd4e2beac74dce3a6c3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ZAQF21800003.