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 0x905cab233f6e304e58778e3b19f13aec49a8603e75bab0c9f75f6a303242f66f. 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/39833125-f557-42cf-bd0a-b6e73bf0a6be.json and https://artists.proofprofile.net/proofs/artist/39833125-f557-42cf-bd0a-b6e73bf0a6be.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 0x3ccab4e5dcea342775bc2321e577303af1e2cecb35725c4b154067aa752a72bd. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/TR5780800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696da844f1cecf36423ba7815b9dbdea9badbbf480e81107f4cdf8e920d19cb7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TR5780800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4ba9d948514106ec62e24f89a6032544228d292b7a76694f8eb6d83ba1b00c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR5780800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2534252d59d877a6a93d28a3f4d73ee6cbb25a173e27c9b70eeee4bf92c1bc9e. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/TR5780800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4323da774a3f02cc8658e002d36c3908534569eaa68aad6710653048882c172a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6J2216649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a46d83666798c25c7d623801f966e5a3f7e011610c227fc94fd6fba0cbf953e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6J2216650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1128b15c2eec01ee8b6e2eb658de0895b7a7537fc34972a695fd079c63f10. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6J2216651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce0479c03db22a7ab87316b24898633c5d1b78a0fadd586ee9c26b9902c7bc6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6J2216652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aa3cb1839d0e5a87880eac0c231cda7028dde922d78c54ca95f59391c26df4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBSMU2847977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c81efed11d9d3749a25c04b64cbb33452cff3dea7ed63e0532908c45ddf6d7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU2847978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1a3f8ad1b018c2db4f2a8c911944c5839f25fbc769cf1b6894b731eacf2dac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU2847667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1560395630363c7ad52d623436640a67688a587dad32ab8e75e1719079c0ca. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU2847670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c75850c316182c1e7cdade5229c8ca2f17e811dceff5cb10f3a22a29c19f24. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:53:28Z), 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/GBSMU2847674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899bf0ed53a4cb3fc4c27e3869281c76a973b4bae36760be1c4fc54557e28ff5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6J2215212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0259eec55838d57404f4393d75db94e07c494c0ab679ec7f3f3d0cd6564e99a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZK6J2217894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d202b48ed6a12a0ba63242b64a27ae088af2e17e1e5e28844312e89743efee9. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZES92364432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1df8386693d2e0a4d17193a1e166c326cab1e0fe6b9d5186df37eaa46d483. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZK6Q2459637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65723be574fca310c6d7a06e2b26ae98431bfe8ee40403d7891fd6e1474fa445. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWU2465978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7c5d46d108bfb901635b9a929fd5f42b12540ca0d33f369cd38dd8a6092c36. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAS2464427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b76298bec9f94c004a986fdab9f7ee01d1f491a32858d9dcb2249bf8c40e3f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:09Z), 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/QZWFS2472742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db0abcb98a767a6ca55a75ec22ad5e9038999effb48caa7a4f5ffcc58ea6db. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZES52559278.