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 0x0fe82f6f4794228cb36a317474b64915c0cd1f3d6de227fee5d8289ca02e7211. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c242328-1d89-4eb4-bfad-a01b748b59f1.json and https://artists.proofprofile.net/proofs/artist/7c242328-1d89-4eb4-bfad-a01b748b59f1.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 0xcaa4cd57db89ea2cc8be51935461ba0c6d1be3b59505ff44cb1bafb7daaa0736. 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/HUB881707113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dad31927e7b460cf6c80d9db5c1eb573f4e3fd38acba8a874f6f691eeb4043b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUB881707114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e7eeafe15215f906744b21b07dc55045fd0e228c350069bf7b290bf3681918. 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/HUB881707115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b5a3f7d7c66980b1217fb170c5ac1e4abc90c546cd7f25db2bc663d5d89713. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUB881707117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d33d01b106de9d3b2546478df68c89ccc7353d095aa790617a9adb7325d13e. 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/HUB881607119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2232069742532ae6ffa2a71c5c66a20cbefafea36186172dcb775402a02dd87a. 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/HUB881600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23ea76cf5b862e9a5726225fe3b3f2d51979dcdede5c0af073bba867b785133. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUB881707127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4db884207237f735d246733ca7376405bf17abb05b4e6ddf5d9ec3992b712. 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/HUB881707128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9401a5d134fd13fbe7977bd30801c2f56257a08a842551de3c81394a126f4642. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HUB881707118.
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 0x404398d3be255c4c1e23faa5ceb54a6af7338f02fb92347c54ae1bc533d74773. 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/FR96X1807743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6281b6bcb5deb309a884cb55e64327af6e0175b5d3cf57cdf14c3a5c28788e02. 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/HUB001900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6432e7799b7faf23ff568190e2f24644911e2b9046e143cca35b4660e328838. 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/HUB001600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb218f4e7811edbf500264d62c7b542bbbcd06a7841db95533baea5bdc343389e. 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/HUB001900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71be4f56df7ffadebf39a1fdc2d4067943e73cef9b0cca85de53b131e9cd375c. 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/HUB002000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2405117e45719845b9ea03fa46e65dbccc4796e08cb224897ce95a74a352454. 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/DGA0R2332128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a76251295371404c86dafa114f82c43436df6e44063c4776272f009ec231744. 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/DGA0R2332127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db5b28285703de5f87bf9fac66c6855e88115b61e9c0a409e6feccb542a297e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DGA0R2330106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fd6d0f445243cf19ce1dbacc0720652bf2e2eca9c1f9dd81bf7e02f7f263ec. 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/FRX762149406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998f256a3510395de15ac36348d9c0197fcfc8186e531d39feb9bcaa57546b61. 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/FRX762149405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c51e4b7ad67ed12abf3eb24cbc03fce1e930cde21074259ef711b68c4a8358. 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/FRX762193064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2b4398e8fe8deee818c50eec3d8132b1c7b3bdab2c25d67d34ac85bab477b8. 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/FRX282221200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc9bc56837b7143a334f5b893f4fa54192a03c79c69ed3f59ca09ae6db7d730. 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/FRX282283339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555be014020b413a6a5a46a73deb46cba0c7fd57aaa67e6cea25b1bda2ea8d04. 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/FRX282295154.