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 0x96cd7de5fd3f1625f46dd40155d2841fa8200e6f624d736ce92fb43bd552c29b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e25d2e3-dbb3-4882-881e-5a2cd236a1e3.json and https://artists.proofprofile.net/proofs/artist/0e25d2e3-dbb3-4882-881e-5a2cd236a1e3.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 0xb1e46cd53b9728cf338e566b91a18f95acdfba0a7ac64481cf83f099654fc349. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/IQA012103125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc262dc63d96a219aecbc12cb97958ab1a22416955c4fcec2bf44642ba045584d. 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/IQA012101810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e7caeeeca91a158b53fd9a5783d858280e7e047cdfff0a720bdcaa5d46169b. 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/IQA012103080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f83e53f873cdb495dcf6e2f736bc94f6c0d00bb4f2567e23aa4078e9f8eee3d. 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/IQA012200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe58357c0ad78dfa300cc41d5f635239e27d19ea9c6d94427272d7aae2357ae0. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:13Z), 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/IQA012200969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1855c31ce9d34808a24fe571d7bd19155fd6bdb6b8f05e1f5013f96719cb8b37. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/IQA012200994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0e8ffb4d581ac1f8fd31d36598c197560a0672302f37c4d7a40b3f8db42efb. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/IQA012301856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234a19a87eb5566b5e942c2836bd27e18157883df68ce27c8c80574eee58ce57. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:01:28Z), 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/IQA012302906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ef465558ccc0c8b819d7cc026faf580a078b3433af7a29200b1305dd1bec32. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/IQA012303904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331e5168154912b570b4670bc6bc63dcbd162dd3727cfb445a0a7330463867cf. 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/IQA012500102.