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 0xa93c446e8c96218b9d0033f329a5554cac4e6236f818ae171e08bc7f92f4299b. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afaa8a4c-8b01-4c68-8ba4-fb6f5af9bf09.json and https://artists.proofprofile.net/proofs/artist/afaa8a4c-8b01-4c68-8ba4-fb6f5af9bf09.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 0xff95179d9aa23e42b6bb3da8e7a9387f6ce0f3d6d6f3639dbacf5b28b2f25c68. 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/AUEU42200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c346f338a7b61e2826a67d90081114cda858e0261912265e327ed1e61dc24de. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/AUEU42200070.
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 0xea3bc277f5d796b8c36c6c8241576d39e0aeca736647b85ab2133feb7bab0444. 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/USCGJ2009131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff7b63c9e723df3939c04bc63393911c0b7471edbb120192b6be6cb9b9b29d5. 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/USCGJ2009126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea46446562ff87b9af2377c7d2385a65f89f34c09ea7e49c3afe98d7c4f1fe42. 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/USCGJ2009127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ba0b62dd61edf28b3aa358aaa10384b9cdc8d9ae13b4b70fcdef28f9fe7808. 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/USCGJ2009128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78116f5f12bec07f240ceb4b79744d7b3dd72afc70974cbb84b8e2bc9cdf2dc1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USCGJ2009129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018bcdefb3317e466c0081c0e7a33562289e0616c986449581b1f8d69c1730e7. 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/USCGJ2009130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f827db1d5fe3a5ad948b6a77615e2f8303c26177595b52d00f0fc7fc24816cb. 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/USHM21666538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28409c8cce184b857d68bfa50047763db22c7c136fb9b74217dfeab636e6b00e. 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/USHM21666541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d9782943ebadd2e1242782f86c8db1d547680201411e5825b52483ddb9ab46. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM21666542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707fce4d5f2657e87d301155d2853e9a9fd1a7b59195399a70e1c9173668d721. 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/USHM21666546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d15f907586b0df3a3d1381256f45085b99783e40c46ba749a5c9af6386d06b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM21666537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa83b1c623079aa023c69d8f52511cdff42d6fd73409b4658b284907f666a510. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM21666539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132d15de3616f1af5814dcb30aa42508e27a971ade9b177c03816b6415551b16. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USHM21666540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300dcedd9fac009fb651d523058843e82ef29c4c5fc4840248a86b0eaa0c3e6c. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USHM21666543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33be874198a222423dfc91c9b629c12824305fbde61da763f957faac9ec57926. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM21666544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896172e19af5a130c6990d826d4c29eeae5ee5478c60c10a7f205d576dfb0845. 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/USCGH1545147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5dc8471427aaf2dcaccc9aae2cef06771276fe30882b10a686b2e185b6ef0b. 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/USCGH1545148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f51bb16d5d6aea7852053ff5e4cea66a9d25705b6810801f5e66287329470. 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/USCGH1545151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dff89724d16e879c6f8678cae627b7812c461e27b610c615869dffd7020e7ff. 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/USCGH1545154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf4ac107f808b6cc3d0fb8e2d4c65d09164fa50f6ab5b69127208532c6ae821. 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/USCGH1545155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54f3fd40fa899eec3bc573b3bc9a4bfafc589391bdffd01f1ab77c7ec206576. 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/USCGH1545145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f33b58fad0097eed126772f66b9731e4967aea9355d887abe0d51626ce10fb0. 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/USCGH1545146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea29e42bf8cf1bfc024a8818a061cf12b49c6245e3bb55a0cc2a857074188496. 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/USCGH1545149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9f44c62a7a26a6ec2cbaeb35255a7e75282b5509d757a0a73ff694259388fc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USCGH1545150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10edce730f54331ca91dfe499d2860a9063125cf5b3c38ab01f5920b36154217. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USCGH1545152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336edcf2f799f748eeb63d96f00b1f7d1bc88146b06bb1865c90a7463f7ebdaf. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USCGH1545153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70c10be885405118854e35a6e571a6d4ec11b48009f8d7508dc08afa7cbbb73. 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/ES7711442904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb6a1d543ea809847feff563957be4fa0c527547fe40645b7d64585991febb5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES7711442910.