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 0x833181f0e9d0309773142c2ea3abd7c969c4cb287df4c24c756f485aa2a3bd4e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/404dcd09-7cbd-4711-ba20-9864579d58f5.json and https://artists.proofprofile.net/proofs/artist/404dcd09-7cbd-4711-ba20-9864579d58f5.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 0xddc64abb8a135b62307d4442a6e5f3cb16472c4d1378c1b7fdd1cb68186c132e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZES81926732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1971f0ca53836ecb391be61a0282d87a6bf500794c2830ea4af806d4f1bf9d9. 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/QZES81925434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da3ad4c5e5714b8c6d805796342653b980419e55d3d8eb49ea2d3bcf851aed8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:58:49Z), 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/QZHNA1904707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776bfb1803eab5a704cb82689f0e14ed76928355b5a4a001982f0f6ee1502225. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWW2046674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ad03a88e908c438d96443a2a9c0f60bdc905c1c4487a1c502092b6cd55073. 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/QZFYY2179334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a0518240d84bee1572d4bcabecd2d21d50507fa34e83186ceae6e90314444. 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/QZK6L2122113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efb0c154069e2e6c1ce9a0c09e9dc1c203d3d3ab5c705c01fda36cdd5ede5da. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZMEM2179845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe1931fe2f8acee2fdd35b136c47758f1cd130ddd7afb7206b2f8432e04b146. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEQ2240245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9366efe50f94a5a7ec64d77a204deaf4ddf9c732636d2547cc81d1664f2ea48e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:01Z), 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/QZMEQ2240243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52341fbdd747f97d0a1bc81c7c9317c878c893d91a502f317ac3dbc4c5dafdfa. 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/QZTBB2366050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6452c79f5b88290bb1933ea3fd3f25dd219585a6a2224207e30351919df50163. 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/QZTBB2368251.