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 0x7e37b7b1a2e3271d7284a27a3e89442d0f19708d00470921a9c76e2e0734ade5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/465ac5ec-0241-48ce-9abb-b0712063f470.json and https://artists.proofprofile.net/proofs/artist/465ac5ec-0241-48ce-9abb-b0712063f470.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 0x6374eeed20696abd743055f7473cb3049ebc72d8387107c7c70581716adead9a. 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/QMFMG2306642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9f42799bc31f6cf82b4ad4bb0b8f22c594d174640cba677f4de6ff7c08a74b. 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/QMFMG2370307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e394b44ad02249e5520d1ade815e0e800b7f6e1d24c6e94353ce9337d3974d4. 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/QMFMG2370106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa521fe06e6ac9d74ad2fe3b23ad38f6d5860a74e0bf5f1187d91f559eb9e6f. 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/QMFMF2385549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ee3b4b6594c429afd171dba5684d2d1b9f127b8a21fc163973eb6bdc91965b. 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/QMFMG2370324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7479496ef7c90f163871ad244ddda380d5dbd1766fc601e7f83e6fe561eb7995. 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/QMFMG2370326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32bfe538ea538b60027a1233a398eeddbcf4641dd34368ca6d97e7aac2719a7. 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/QMFMG2370328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdf1ec527ebfcde9898873c0228c96d1a3b8e9b4b95433779200dde864481bd. 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/QMFMG2370331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de82a68db0ce1f1ad9bdfba0ff209987d8e0c5623300b4e525ec3c80a9a24f6. 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/QMFMF2390630.
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 0xdff9483dfe0f6f663f94f5e08c12e9ce2015e39c1189409e8740bfa03a0e05c4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMFMG2370306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9bef807eb58a8e4aa6a4239266531a791842a2acc198fb986e56052226597b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QMFMG2370325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b36d40c3c5475fd01ace2b0a8adf3d2dd7d0f5a7f51e230b319bd73d3e0397. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMFMF2339711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77016d7eca7ed0d5d4f22a4b28d7237e62acb96e5f40f7615c2cf2b581449bac. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMFMG2370330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfebce443172b237c36c85d14643e728de39342536e83979233c6de378d48a8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMFMF2370358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62ef540cd49adc6d4ab8dca7dca68a43d6bafe5f55635e16d20b2a762456e7b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKPL2022517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2475a46ce67b5b8e1ce9cdb5ef0d103f11838c0bd515150ea7c7a6ba813732. 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/GBKPL2022515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32d50b971aba56ab823c00d0f4bfabacac0d41e7c417a19e42408fbd963039c. 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/GBKPL2022520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317efa50c3b0c4d34cd7303f46f0e2713aaad7af71bc0928302c2c7f34cfdc5b. 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/GBKPL2006926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745bc1c80a567724bee38a11270625d693d931656d2fae97d4f654e3a863748. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBKPL2022521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895713fc0d2778f82e8379e22f94e6aad098245d11e7e5867c1d71013639edf7. 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/GBKPL1963425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c0dea6d6b4dd21d4eee716467df8570e03a4bf4342145675bc8d7f70ca9486. 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/QM6P42444339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0062223ae70e3f1a4e8fba3ba5df1f8bfecdd1a910943e60c7648654745d2f3a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6N22414806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303861b5e7e2b93558413f6d50beee21bab0ce187b227e1ab9c2f3b0639ee955. 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/CHF032409756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792cda876ec92fcbb86a0dea2de4bcc4c28272557e923077b56c98fc62e7ff55. 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/QM4TX2455417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9426d10864d6e6440512476d580ff8702ccdfa0d616f840511508439a07f7da3. 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/SE6XW2396415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325b705cd137cd992b1bada575791a4baf1103d68585beb276c595391516438c. 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/GBKPL2206609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04eef7a28c167499a5a02372f77b4944e21ab38f136da27f582f1bcdb1ee14b. 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/GBKPL2288987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e831944320ea8dc0f6db765aaa5ff07ee57f5d7366c83499303dfb477264e0. 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/GBKPL2288986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f682104dcef286bb820d1c7b13327ebff7b63c7a063fe206172dccb277957d. 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/GBKPL2165196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4090ae557ae09a2771c43bb7a050d25bb216bce7d72d3500f7bb20d2540fb0. 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/GBKPL2146539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42102f8e48e67c0a6cf0814d71725bd493479e302e2a9f93bf2a416ae03102d3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKPL2145312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2817dce84a3ce9c554cd5a3a5629066c90ae1d104dba2e1bb235dde308b2648. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2017380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f11859944c4fa9cf8b24379b5158cc80d0e6a9a70b5132b6571fd0940c9cf4c. 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/GBKPL2017379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615573376d15cabef694ab57a5e210a220e163c6498e2b4da2db8fce643fbfce. 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/GBKPL2017378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4ac6af30f8ebccf6dc43b9b978244eb0cb89f41bf1899eae771f5e8303a808. 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/GBKPL2017377.