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 0xee71e1c13b1c777fc0c41cbb880f97973c47c378b0bbccbaa912fd919f22ff8f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9da2550e-0526-41bf-9020-24154c4b09e0.json and https://artists.proofprofile.net/proofs/artist/9da2550e-0526-41bf-9020-24154c4b09e0.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 0x4dee4ccee8f7b47f28386621b8aeaae550497393d0755c51fbf12648512baf05. 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/ATHW72100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd7ce06a3fe6daf000fd56e532d2f2d469270ccfb8e359a43a0779d2801e704. 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/ATHW72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f788cb8c9d12278d15744b1ee55b6518cfb9bd868b41fc37c917bd2d7e67e0. 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/ATHW72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdf8e443b582e256c058a7487282d07b555184a0d5a3bfb72b6d30321a13b29. 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/ATHW72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df311ea9d04916d2702de65016f8f9a5712cb1cea6329cd48eefc19fcd91028. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ATHW72100005.
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 0x824f04bdf85e6bd26d7584e368b0761276fc8b77e26518c16e56ddbf5acc4b34. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ATHW72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c305b03a05b73eed856f2dfa2dd2fd086dda310dc562fccb93c84439dd96592. 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/ATHW72100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7552806f2f927b10663ea6883ece17712e3c972604a355eeea074653f43a3206. 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/ATSA41600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6614f60a7c0199968a568c7e565d9cd65b9f9e8dfed787d358cdd0cf2fb530. 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/ATSA41600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606870136303341b0065d1fc4d2210223f9cfbb4cd112d4cdf80245d1d00e427. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ATSA41600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a0ebd7bb49eb11b66e7486a98759e4deb8b4f496734701dd2fe071ea63c8f2. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/ATSA41600012.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ec15272d4660280e339ba5a9cfa2b676134da6c991ee7a091f316cf5030ae6. 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/USCGJ1172104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76319c4574399586b1a34448a585da23ff0f0f3712d6877bc56fe34eed13ba4c. 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/USCGJ1172106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1835113fb7e5689315d30e2ab3fc029e078a1c2a2fb0f2af4f19d4b5903826a3. 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/USCGJ1172108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab8816c10d1e1527f704565497f414d77b0859a25a68fb1c49ec40cbe5dadd0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ1172110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9d94ded6603d4501fe834df23c913d486863b8cf62ced929dfc28f201d19b8. 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/USCGJ1172114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8be2dd0db4a99b8bb63ead9ae4360a1f079aabee6da8f86e0a428deb8d512e. 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/USCGJ1172115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b8b0914077a360c4ead190f62e286fbdf40c1e5112da22461c636b0d796bb6. 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/USCGJ1172120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad71de8d8976cf4107c36d830a1f80e0ea2a0b78f275c5e5e2828c0a25fff40. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCGJ1172105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39c198f097be0986eeb49dcc3e6fa619c1d23f6609b1614242222290f8af05b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USCGJ1172107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875f5d0ffde59072edde37c45d259747b6b12a106406e11b2322c1679202dea. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGJ1172111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb310884fda853e83a221e0b9bd2150e168dad13166df8dc3ba5a48b6b08d7012. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USCGJ1172117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb497c9709cf87603451f3690d2a1c8191a1a71362ffb9d9f7dc655a46c1d0023. 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/USCGJ1172119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12cefe8e4c98afa93e18a1540cbaccb0981f1dadc8bc7c2eb035ec106c30fa4. 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/ATSA41800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c746e42265ba721e8403f63e46176efab3eb32c60d2f947d1686d0f89ecc53. 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/ATSA41800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647c2f72593bb1db4026632709c859c1b27bd1c1d9085c24204ef0b129b8495c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ATSA41800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f3b9d8ef3677aa7e5b0641385fc82f96588aa45cf131dacb070eeea55aa8f0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ATSA41800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e047029ea19c10edc19a15a5f73265bce7269d74d6657d8d653bd76bcb63b40. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ATSA41800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdca570ffa744a35525c9bf6f3a776e5085346768fd38ef432866056c06efa7. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ATSA41800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3789114ef50e09f4986fa1daa369c96371d4fb7689ad79653825cc6a546151b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ATSA41800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45b5d9e9758f371fcbdbe2d983aa3f8a057efc762013630717532e17973328. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ATSA41800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7f1a00c58604965c1c2725db9a7b6397374d58da9b051d803ea6a1329a364a. 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/ATSA41800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6f28bac826ae2fb5a3b02b9d6bedde03aed6bafe9f88ee873ee80eb63be714. 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/ATSA41800029.