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 0x5b80cdadd1ee181da34116489f446bcb258550e56e8972098281d4f69508a75a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73f0a1d8-2bff-417e-b50e-cdc8b767abdc.json and https://artists.proofprofile.net/proofs/artist/73f0a1d8-2bff-417e-b50e-cdc8b767abdc.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 0xb36f053e13e0cdb1f648edd7b525c2813f3a68fceb2995731d426841c440779f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:51:19Z), 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/EEUL32207699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7d673622697480398ed4461269afb508e78c8f47d617429632876a50a3e709. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:01Z), 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/EEUL32207700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4850ec632ff7b24062c41dc4dd173ad2f1db89104c3463723adebce7e4cfec7. 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/EEUL32207708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec906012c3edf7b9607fa3b2c9532f87b6ff9fa5fdca0f5b0ab096c2d85cdffb. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:12Z), 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/EEUL32206863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ccda5b46df46c6775f388681afabde03df337cddb6f7e5e43aff97625c15d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/EEUL32206889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2ed8c054424dbadad805ccd9f7a11e7eeb03a1f1ea37b5f666a73cf6666d79. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/EEUL32401947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e00dc311b4ce8a32fe0b8cf1937d9e718eb04ec34f33d9f9f563a8ebe92a7f. 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/EEUL32402019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f14644c68bd794c908e208d3050b6699ea68a77e9c34f680cca755d3107fa0e. 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/EEUL32402950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3e3c2befad526157294404402ab4853161b22a01354c803134e04dc76a5b60. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/EEUL32206937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f079ae0f3f713f36e1765ff4e23f55509cbcbdb4ccc748b3896ba8dd383f908. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/EEUL32404993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e2d8f2b4f95d0d6fc6d41e2f04a2f03b20320655450bddae3a6121ce33775b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/EEUL32405195.