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 0x81303a696a7a8bd701e3b7e7279340044e9f1cc8df54f6a74f68e6112279c853. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1125a0a-6a37-4d09-937d-40a0ef6302df.json and https://artists.proofprofile.net/proofs/artist/a1125a0a-6a37-4d09-937d-40a0ef6302df.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 0xfff159de3f53d90a94ca0230ecf1ac18d8c558f4d53d80e638dfae3520200e80. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB32275479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368cd8053de164b33dd410e6cedb68708693aef1ba31ca0db1ee44504df9c95d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES62380478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3f6e70fb7dc6438fa41bc9ac11dc184debf789f5a20223dc2b6f5ebf419022. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZK6P2391884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a406c7251bf10f7b6420593d5a51c9adc74cbd44eb28929b50cd50f02d0c70c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFM2340600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b952b07ace103fc7ecd2af5290e0454895f84e7baf4d41a27096015e05e6ec6. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZWFN2387694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59183d1dc1a26f00d89b35c93e6d6693d77427b150fdc44b177d05ebb4faa571. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFL2476463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e91ecf2f5f5f71db64c717ddda323091e052511f0bec3cb7c7fd20fa543705. 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/QT3F32480783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb2bbfe9c3ac3dec732ba6e2a1e32fe995711adcbe4bd476db6171aaf16d531. 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/QZDA72509720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9468c7426d92dede06edaa8638c1f99b17ec9a8f7b4c8a3beb62cf2d05ceb87a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:50:13Z), 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/QZHN52587007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf8b4d7af68c9fe1838c1e372176c76439c0ceade6ac66031bd2b1df005df54. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZK6N2527772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4b601e98bfa308f3e52e9283d19b05cf27b7ced1268ea43857ee8942b5ea29. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2530921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b4a0e998f552cd9dff21ab4977992f7cbb7efaa847b72b057292917436e682. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTAY2530922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a1fac1a254a0eae3b9dd4ac40a0c75f7fc451f968e3b18079cfb23f86ee176. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAY2530923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b8ef3fcf3a04a8f4dd66b7d90a5e85981dc03553c4bed6b3b27b4790bcca7d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAY2530924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331b69878aa679f8ec93b55e5a65e133144ee49da877179ae0d1ce7b18d4e656. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAY2530925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a354bdd2a17d17965003fa40beff3437617943d4ac4206b489f1710af84457. 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/QZTAY2530926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e9ef3abae0e011f61b75257e5e11fce26b8751f933a64f6c6c4405fa3f1316. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAY2530928.