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 0x6c44a7b0b746a4f8a175ac993826105833ca2902d8639c31fedf5f7e2eefd884. 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/095694a7-8b7c-4d06-8e19-2c7f20660c3d.json and https://artists.proofprofile.net/proofs/artist/095694a7-8b7c-4d06-8e19-2c7f20660c3d.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 0x6d202545a28907a6ce8f94d53ff891aee2cd69f916cac52f0295d3e601b9f466. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZ85M2059843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2f5f19df1624a46b6b805a6c8d2ad2621f5cadcf6aab6be091525415cdfeb5. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/TCAEU2010922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2746b271bda726b7f1707a8009611fed3b2532463696a2843bc7a1ba7437b4d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAEZ2086875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b4795ddd83c1b0c20eb8d8db5ae5a723509b27b9b1d5e373bfed8666346352. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZJG52241226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fbe403a86f58deb0bf218942e738a937468014a92dc2d9eb60d96e3a2b56eb. 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/QZMWW2235459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051478ac7ed04108b11f058692f09e192b0a3f05c52f10660d6eb54d86ba99e7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZLL92327366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26c0af381468ec61a6a09ef0199d2ee2807faa2373a851c377c56738085a472. 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/QZHN42384348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4406cb30e6714a1aa96ecca49c38626ea208315f8291a2f17517e9c6beabf625. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZMER2312312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760a686a55c0bbc72a0a009d7952637481e408d75c8f22f1e036ca3b26c15a74. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZMER2312313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950669960e536dd415bd3810054c82a08e05a8cd067a282338b1af9e7c1e2f24. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMER2312318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde696b229997c27f48e7e5ec88482779802a00ff734d9c1a031e287e0f21b2c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZDA62459609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4ce820fe5bead5501a63ee6884bac3c0a8d01c2028a6929aed010eed9158b8. 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/QZPLR2443068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67718991ca2016390304b11579642edf962f8e89fe6fbd39b03c3edfe567ae64. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAY2430113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e21ba018f7bba611f73b897a4ab3b74277518958f9e1298fd97c7863596c61. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZZ772472061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb682a686114a4b3b334c0d5981613531c49fec2ea2bf80b91dd578b45b1bb5. 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/QZDA42597463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3921f58ba867fa554dc686ad38b3cedf351c4df25447e27cf9884169ebc3436d. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZDA42597464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619581cfaf9bef191184efc2b3c8c39db362923d4b633e17b22f04f6ee8fd4e3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA52547964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe0981e5381c68635c2c089df20b9a4806cfc22799bdce68f85e5bf895757fa. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/QZDA42597467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c292e0142bc4a14905da003f6e2507a9165f4bc40ef238ea89494f153c3a099. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA42597469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0269fcaab19504053747f78607eec50a4e06f343e124af8b5bd1e99db5331e. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZDA42597470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6059d5f3205aac140a7650acb4eefd47ffe3bf268344d0bbb06bac68577bf9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6G2589798.