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 0xafc59953b8ef48c308fed80e5cb77b1a0f41897fa5e3152735511d5d48953774. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16ac2244-2f9c-4507-b709-0c7c6534cc88.json and https://artists.proofprofile.net/proofs/artist/16ac2244-2f9c-4507-b709-0c7c6534cc88.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 0x6073473875c61e1a84ba1dae199c1d01e77734666003f18fde0dd49c2d1a4d1a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:36Z), 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/RUMU12314651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45595e8f8ad53d0374e79618befb20ce42431131a35946d85300c7eed8d9b0ca. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:39:34Z), 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/RUMU12314652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391ad6eb2657f96dc6053c39513e240de4bd8728bab8e8dbba430c2966a9133e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/RUMU12314653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaf902cc4d68c19f16f06e08556d5ae7efe766c5bb80ffd282f91ad2d1ff499. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUMU12314655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bb4c1b908d19a0b41b06c9d7d03e2e16b831f622334a54c8e45a362e55291f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:35:09Z), 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/UMA192190321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e4caeacb1a0994dba3ed0d922d553e909981b21b7d0546d4e017efc370c7e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/UMA192190322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d4769300f572e135f8e13db9e11582741c76711eb98c71bbece2f69b3aa9e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/UMA192190323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20981ed25c42135333328ca3c208ecaacb5425e5ad522260cbceb32b3dbd72d1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UMA192190325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f67b5a491d8501e53fc854ea49caed4d3f3a73a1d8f0df237212ed2aec407cf. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/UMA192190326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c22afef4dd43d558c2e7c9d8120263eab8a2f94f99d950780be98403ec7aef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:32Z), 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/UMA192190331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf102452f4ad37ce206ff7757e24a6ef40ca03ce4ed7779fb62197647f2a8bac. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/RUMU12314710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0aebd310ab352392435cae3b7b80610a7c8d2957574231de9bce5e4bd7d8bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUMU12314711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c437fa0652ac6afa36565330c7f6b5f2e28ae109f143fd5cb2a99a1d75d9a5. 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/RUMU12314712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4c1831465f248bc6fd651953ae0330d075fdf08fd0a1ad2d072ff9f7f5f6c0. 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/RUMU12314713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311f5d09479a1eaabbab1a93702829e35e110032061221d3ebc8425393674a33. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:48Z), 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/RUMU12314714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145dd31dce07c775def30ca5cf0a1c7980b0cc0bbc9c0b9e321a599f4190e6d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUMU12314715.