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 0x6244ce1d0f1116cc6e794a54b3dcfd071ae7373a753bd044dde8015b7d68c48c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4f3d95a-a193-476b-9806-cd3c28deeb5f.json and https://artists.proofprofile.net/proofs/artist/c4f3d95a-a193-476b-9806-cd3c28deeb5f.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 0xf12af1fd2c267a6ef316b0c9572e6c4b493b0a6a4cf45d743371d5e28e02d48d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US7VG1592408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a77bb54d69a5dfe3c5e3af669f9ae0c76aab52ea87d08e0c421f615fdbe8b1a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US7VG1592409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0f9770ae3a665c70525447ed3edf14a6038e417ba5813c7c93a005034edc5d. 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/US7VG1592410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a23e981609476b29afca106f88a5ece91a734679a72d369d5dd3e9da65f2009. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US7VG1592411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ecd1e4f35c3777f5a19814ad2f826754962e5943ffe66a1cee3a0458777891. 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/US7VG1592412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698c2e073e7046692aa57e1095904fc4baba60bd4d2a181b026921c1b44577b1. 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/US7VG1592413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd509c599ea4a5ef0d7381f2bd48caa07856980266765e40c2278d3ec09394a89. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US7VG1592414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bda99fcf88d1b3218fe54af4867134adddce943ad9eab9b99d5a18d6611542. 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/US7VG1592415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaca830ebcd4d21435d8b6579249643c94930645ea42d0f660a022ac66edf8d1. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/US7VG1592416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8303b4d3d51cbd52cf96ff6275004b0da24e68ad8fb5d092793b5b6411e228. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG1592417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d395cf127ce5c5d10287d387bf6d43ad4610569dd007d40c70f3915104af9c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US7VG1592418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996a0088601b536a503224a3daf42e1dc96ce7b720ff7b056c2058fdda4d0179. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/US7VG1592419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71042b10384f64b070f606fc8df2a9d7b6cce59678dbebbaec4e65b60a1dd704. 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/BXIED2100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b323aff575676e430a6c3ea64fb8fb682837b0e7b4acfd08956a1501d67ff2. 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/BXIED2100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fa7787bbdc38fd7b65fb4452e34e1f3b7703e66d405ff4ec7c1e6a3d25412d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BXIED2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4d81a3c57144c2266ff6e31f84a520564d2470c00b859f68b4defcfc69f6ec. 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/BXIED2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e6bb9bce494624f31dcacb1f5c034d129d69f4499e154b8c42dc6ad613f9c8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BXIED2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b52061e161770777d6012a17a771cbfacc018c5278881c13a7ae9afa4252a5. 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/BXIED2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa16fe98827fdcf16bc13fbb3955191c189c75eb555d6c82f900bca06f9afbdc. 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/BXIED2100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511382008b9e83e89f26538319d505a8d653cd39e7f63fd9adec3de2fe77547d. 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/US7VG1625011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c7b9d9adfd9b6985d819524d61da3c8608c182f812dda93207cadf3a9c110a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US7VG1625012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2909e2203231466b616ed362295b47d47001c08454b58110222b82d3bbeb31b. 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/US7VG1625013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bec6ac35ca3d3786ea60a63347e997a125b4907ca39e17d91483d53075834e0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US7VG1625014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cf749fed50ca480446c3fac8700dee447b963e5f738840781c54c107d7fe48. 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/US7VG1625016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd16c367608bc7ec51a05b190772a5ee0630e5665e7301fde34728d25076e6. 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/US7VG1625017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c67e531c93cd25a3324dabd28183e02625e2b2eb639524014c9b7970bdecc8d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/US7VG1625018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd058e6c329dbfba0b7acd01f4c681abd32515d8f462a6e4df67d82372f72535. 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/US7VG1625020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a31e941f0c808da359d3889354cf858e1386bd6c08c5fb78aa3e8aa4ac08cef. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US7VG1625021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b6f1d59eda8505b07892dee5291f0cfc87f04d51a1f03a10360dc0d150396f. 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/QZTVM2352700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55ee8bb55749e2484079d6b21d3c837f47f9db595aa28956439692e179880b3. 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/BKDYN2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c11a1238b08d66c908a4755a9ee94cf964efd8e5dc1a2182f80402b34a9815. 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/BKDYN2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ca1faf6acaa4906846389b4f1ea7b29d147a456954e332c4ca7d44748a5432. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZHZ31965306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86a70ff58391a217b10b4e6660c5c39469be39b8cfdd4eaa4f8435edc7cc800. 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/BX5EH1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b601c7846dec709e839a15ae3483e791321021a2cf33d489eab1bf942c0edb. 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/BXIC41600261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbb8ab99d5f30bfa75349d8f967c32ea5d2e557ecd54ec0512aad488fc9310f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJW2364718.