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 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 0x3f7bfc08da755a431397368c9b65f8d7c8d70ba8624a2f9056c6ddff18dafe10. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/254e5212-14f4-4cef-91cd-8917b3c9186c.json and https://artists.proofprofile.net/proofs/artist/254e5212-14f4-4cef-91cd-8917b3c9186c.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 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 0x889473871ad0f5a119b4bf4fae7503d2ea4f541d9662db865173e7dc0fce2337. 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/LVA101200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32668d30f43a0b5710db2d55c5c27ae2a0c20b8e28dcd4f678aa4c802e44ba42. 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/LVA101300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5814735f7b9585321978fae69a3ab6cc23867b095882fadf92dbd8c4fc866d17. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/LVA109800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e3c260365e5b1896d146f7d031ae039c88364dbe3f4a2c28c3d52506de54bb. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QMDA71391549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fefff6b1c227f9123a48712223ec62f181c3de4d065580b8d7a04a03268dc3. 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/QMDA71391550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747b05aba61d553c03d903e30bce3c653c995c9e09b0d9120f5c6457fc3197d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/LVA100600357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ad37a8b26014caf6d818caac7df3ae842020e8ad98f83d121140d007b23e4c. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/LVA100200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ef1fe219aa09313682ac5de0be30f87bf9cf226790b651c367c6e7744c64fa. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/LVA101200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6457390031ad4ce48016a7ca92180b6e72ac2e48951ddc4e3b61167ccaba4075. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/LVA100100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe330a0d8b9b604c5aeb5727ecd1afdb834d13ee31a430e7a0994f5c7e077ce8f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QMDA71391551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef76f75912f13828d42a1bc289b103e5ddbe92af707ca6c32dcc3d8409e4359. 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/LVA100600359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8e01643ac06110fdf120357915955456daa5878b589cadec8a7e96d9af2bcd. 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/LVA109400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218581c694f2d43d1caa306d9f6c54a8e60861db4bab001faaa58f35aaabbe38. 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/LVA100400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7551083b52e9e118c2a30767c66b0155405bda8bf53eb3cabbf023732d6913. 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/LVA100600225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fd824edb57fde6d7a87f8ecc5d99377a53fb5bb7d56355d7bc0717b36bfcdb. 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/LVA030500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbc86aa6f502d84b8007a1a4aef083f4ce54b8dcf4fee2453c114305c4bf472. 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/LVA100300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87586d13914686a280d812d98c3e3de39cab833af59db4ae11d256d2bfa2535e. 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/LVA100000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69a4c839ad9a6dfce470ba6a71246977be60a81f804a3f37f36708dd9a795fb. 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/LVA100400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0273ea2cb5ba15072f5b1e3e7490e2f9fddb2bfc9d6d381dc5434b5c0313c420. 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/LVA030700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f73b545a8ef7d091af97e7495aa575f7112ce0c5e3c25380477aecca8f3c81. 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/LVA100400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56356ffab3bd1c4d47edf7550fd1639ae5aa289baad538d2e8c1aeca17d57667. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/LVA030800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd02ebefe11fd01334cf711e96e0dc2e498ec0d44b92ab2cd5a6cba4b0a5c6. 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/LVA100200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3824d524d9fc79f592424360d17c305b9e008f04fda45a43a334c71b2f5ef02. 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/LVA030500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b2db850c9f55b220ac478a8c6c3c6e4404107bf2a2b9831562bc76fa8c283c. 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/USA371257725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e099c9c5fe7a91df9c5bc57d1760702bbab5e8c830430850405149f581fd469. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA371257726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281435424e17e7bcab268b37810a93ec503ca073ed338f0a8bb53642eda62981. 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/USA371257727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89de9ef629b5d19dcb8e78892e4611b0be88a2f8b80169382546fa5bc96ff062. 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/USA371257728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a55e6efaabf9824028c69709ae6dbf009cbd1f010729e184efdd9450992ed5. 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/LVA100900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fbba0ef33fcfe5c1893b2c587f52f36cdc3d7f3bacc29ccb955a49fedf6dee. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA371257729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58aa959f3d7d0e9d9a3e03748f184122c9ab3045dfb662b49114a3682926843b. 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/LVA100000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b24ccc2bf2bc8157fd8cc4a17e85ba8344622b766110b6ed1ca59f39f7b351. 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/LVA030500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc19b39f2c7c86964a32538a6d324b4c64c489a9eba94de41ec61bf8ce316be4. 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/LVA030600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaf4b187d8841859dfd7790c4d0793b9e0eab2d79dba1ded3f71fd033bba7de. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/LVA030600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4908c1533f2185aca1365606c073aef0886cdf9a23833e17ef28808aff77162d. 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/LVA100500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c6b98374a07ed1cb5288caa76fd1ab62904952b8e1ec3d61364170cd8e6e4. 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/LVA100500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a08a6822149cec407f65c2d7f90bf77208cc7b4668ef5d6a8ebf884c11946bd. 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/LVA100500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fd824edb57fde6d7a87f8ecc5d99377a53fb5bb7d56355d7bc0717b36bfcdb. 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/LVA030500030.