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 0x9b83b096d6d6a06e63e9d373dff918a306a2e95c19b7a01baf30e6fb32f16411. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b83a73a-fafd-45c0-a93d-d5c591bdb553.json and https://artists.proofprofile.net/proofs/artist/5b83a73a-fafd-45c0-a93d-d5c591bdb553.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 0x5e9c2eddbecee215a46fcade1b0e764c60b72bc8818c1cdc4b813b07a317d42a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:21Z), 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/GX3Q92445052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd51ad2921a1195c58f9681629f95cbb7f3de92fa68ff1fe6ce4b7f4cebce86. 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/GX3Q92445053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48464abaaf28de1ebbaf1cf1bcfc221e25dca097abd821bb7460c6498c7bc442. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:58Z), 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/GX3Q92445054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23d65f375d13a75394a18afe09ec02c65d499332cd058eb7191d3e525de9519. 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/GX3Q92445056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075f91fe47153ac8c968b7de5eff150b7edf40a3134b34756e8c4b43e4304134. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/GX3Q92445057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcd1a79c2ee53e2f02a7cf9827ac6be4b4e8a963af34b508023e9302c7c2303. 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/GX3Q92445059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc1a51c5eabc34ba157524c6a6247b3101856783819f4d2549f1ae144533d73. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/UKXN22414880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b49bd6ac66cfee72b75774984918c083e9823532874b5444b3e4bb35bd5928. 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/UKXN22414881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194e98c55efa342e9e0b80b793910ea3356c6f3c17626e78b688175bafbea86f. 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/UKXN22414882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2cc2f9c7190d7a8b6af409fe7ff84898841fd602d4712718e27c346efc634a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/UKXN22414883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ae006c01635358b7073b179fa62bbef1aac8dd7aed8c9f74c6b03479ac09af. 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/UKXN22414884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb65eace10b6558faa0f8b069d8d5e9cd5251a5353437323c67caefb0a62e9f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/UKXN22414885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c989cd61c9a7979abad7010accb4d12140112b5c4139e827a3ca346f6303e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKXN22414886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31461912a301ba703b955d079e913ecf661b64bc642b1a2803f4000655581f27. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/UKXN22414887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d34cccd17cf6b7afbb7df4c053034d5340f6b57ad1abb931e957e0d0018cab. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:34:40Z), 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/GBMA22443056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d0dceb3738d75b2b4b7188637616e4fe00c13526163f3392e99629706f4e03. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBMA22443057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceae221ac130250fa93232c4da054f21fac6713f894935ab0926c64db38510bb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBMA22443059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8baaee7904880abdf6a17ca4ef0e78d846da686ebb462a5d27553136f300f0e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:39Z), 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/GBMA22443060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6f6a4bf0667992e6801507a0c1aef4e3baf14f6e7a03355f031b1f4d7e19a9. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBMA22443061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e3d571054fff45e509f406c925304680166e69cfa9dce3b6c621173ca4e670. 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/GBMA22443062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7547427f5fc75f6c73b550032793f9b2f0eaf6752a4a207ff0bc13bce4cff5fb. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GX53U2340378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e3681dd263154d1be92151e606203faa91ee2ac209b5a901958b4ca9e6c26d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX53U2340379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20c733f7decb6a501af3dee89a63009ac8a957d092bed040b531f878dea95ae. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GX53U2340380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9829b7d79b6a1863fd990a6115b170abdd6b67d12dd9253cb729b3fc784363. 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/GX53U2340381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2356442fa312ff871dea83eb74114d4d484ad15c8c3bc32c1e270230b17b06c4. 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/GX53U2340382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc73ec7e73f949fffaae6a3ccfc5ee3e1dae0ff84cec8779715af7e7880fe63. 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/GX53U2340375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd66b35078728a56f86552fb7d86d90bb5ce274ef3c4bf93e348fb58149d52f8. 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/GX53U2340376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ee90c7903252a0e393c428dc9c6fff78cc5c168eacf8ab376ad829f0c219c. 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/GX53U2340377.