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 0x304fa01102c920e9754fe67680fb8e37b70be120d08dfdd03e1c8ff9ef45b5de. 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/492befd6-0ee9-4260-9330-7f52b5fa8c0c.json and https://artists.proofprofile.net/proofs/artist/492befd6-0ee9-4260-9330-7f52b5fa8c0c.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 0xfc62d1fbe30302e9f895da16ceb420e9d1dfb9badf1ada439f882e7aa67e3fc9. 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/PLC590800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6793d3b2829045bff5b3059cc46a8c9f549483a3da4f46ef7f83014c99acb6df. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:17:35Z), 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/PLC590800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c893bcb12e3cc7e1cc683114da314c621d53f608063329f95c148dd1a65ac23. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/PLC590800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbab57ce681bd6dc3ab76b3c2616b0ec2ac5e22d3db7448281a51e20f4554747. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/PLC590800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeac9f1d856321f739838c7921189354c91fd7c3041bbab763a4743f3d53039f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:08Z), 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/PLC590800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a94b636d87446f6a81dd5675b4df65495272dbd8e80e871c7262010daa7b2a. 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/PLC590800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd8b95bf37a535dde2f7e2f9794349bcaf85b416d833043991ce78ef10be048. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:10:19Z), 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/PLC590800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c573af388f4f8b4bb598a9b1f4ffaf7f2f1d207ed74c6f7978adbf1841b3d59. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/PLC590800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cf89a53d1ad909ef2c5df5abebbb5bb11b42af64884c230beafbcfd3631fbf. 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/PLC591300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5a1b6678634f9df1cd99bb462454bcceef4d4dd3b64c742383b361ef0c6127. 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/PLC591300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6428253dc3845a84497a1730f04fd9fc623789de6cb50306de7d604b19c2a158. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PLC591300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24197bdc0576f79b2b3360457d6331d09d6d89d570c47b81afba712007848cc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLC591300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ce42cac5ca68f2a231c04511b9d940fd6e8397f33d5da1d537fbe444032ea5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:16:13Z), 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/PLB822000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b705205fab96fad1faaccfc6d1d637369b4e59aee1116f18802c9210d2ff115. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PLB822000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db63f924fd97a90472fd0431e5fb058968a43fef66e4d87027d961087b16e9e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLB822000523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71341a9c8c97f0639324cf1995fd2b27d9a3c346ec8e5b0addb51c3a32d4b53. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/PLB822000524.
Noc i Dzień (Storytel "Miasteczko Brighthope")