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 0x24b478299381d6739c57171187a25ad467d25b7af86ebcc4d44c5770bb551236. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70649140-92e6-47dc-8a57-748bc769949b.json and https://artists.proofprofile.net/proofs/artist/70649140-92e6-47dc-8a57-748bc769949b.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 0xd33c4c0285cfe06db5664cb959136f06a781835e9c4f924f3ecade8e6cde4e79. 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/USA2P2405622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a1745843b09f05a4519d4f7edf6ffc5d3606276309cdf33d1b4bbe93e9ca0. 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/USA2P2314581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe812d70537b48653a383eb7a892ff5ea2be5c939c9d4f0a46d5d19b790443318. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA2P2314578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d340c54d5620b002ac0420a1dd473001272bb2d36a5459e9fcb8e5b2bdc513. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2P2314570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb835b8f33de2fba4a04fd051446978e560bffce1d38698b0fccd3675f4ab1602. 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/USA2P2314571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259199cca9191441161286c27e19b0df60d7df3e61f29c07c77ebd79fac101e. 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/USA2P2314573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c12885df4c7db1d9ed43b9a230f49bd291607fafbd90290c85c1c4141da089. 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/USA2P2314576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bf17c87c6a18c5afc5805505d0504f88a7a498c061c71234aa9f2e20e4a2f6. 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/USA2P2314574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b6ec778a2c67deada376366321311a5b97ef043d870306be7ace186308088a. 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/USA2P2314575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbc666f4e12a5f3ee9b523ac03094bcbc8b77a171819e7da3a42b7a687ef82a. 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/USA2P2314577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0129114b889daf12a4e6b64377a5caff7c5547c24a5f7c567fb77a472aeba4ba. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USA2P2314579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ae7a4ff30127299537a3d3b98db77305a76c7bbb2602e38f8ea32b6bfc67c0. 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/USA2P2314572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f7baec3e282f99dd6a2812e34435e7665dcdcfbecb338f8694938495d11a34. 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/USA2P2314580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0be63e4df396e06fb581591aa8b1e86daa6268a7e8403d0338a00f86ff7f58. 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/USA2P2009794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a9d68349dc9e4cc5a4106bd027a8fd858aa858a123621eae6a80a0ccebaa2e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USA2P2009795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1524c4d04211ff6c2332d9086f44342260e1e657bb814ab78a425be43020bae5. 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/USA2P2009805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc04d1e8b8c35ead755d45320643a0b9a9872289d7b857675c61e47efb71704. 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/USA2P2009804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61cfa327292d40a6d99a8b212fa8ae23c34cc300002b5aff0c46e70ad836b3a. 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/USA2P2009803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4edd285fe0d9cc597b10428352675f669e1ee9cc107a19e87b7635aedb3cb81. 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/USA2P2009802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3b94dc596c4570c1e12eb8d227acd850b7615abf328f41af11d627ea668370. 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/USA2P2009801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bb5f3e24239a55084befb1fad01342d58fa6ecafe21ff28015d3141df31307. 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/USA2P2009800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae45d235a863b5e75bea174081619f029f08cb01dd7277a9c30ad1a9bd839127. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USA2P2009799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ad88a975d31f894b66097aaa784f901c730737c1aaf8c181e52ce8a4945f19. 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/USA2P2009798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769fea470eeb27a5a7fb168ad2954f6ba8ab92aad8424de55cccf1dd1d1fb289. 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/USA2P2009797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e98fd8c60e0256cefaf41bfde598927dfb7c18900ce9c7d274663f4b8dd41b. 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/USA2P2009796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ca0213134b14b50cc459f2072ee37bbec42807d2f6ede22e10ee0c19249e4. 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/USA2P2405618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8b941237547904572066311189bf93f992f5293c1f4738bfcb1c1d11b8dd35. 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/USA2P2405620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa84af0a03daf96690f5ad3f5919934b9b77cabd3408a12462633dfa67d179f7. 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/USA2P2405621.