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 0x53020f65a87e7428908203f1ff9806a45731574d6bc387295ac071935ccf9af8. 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/00d245e8-8e8c-4332-a26c-84d76654399e.json and https://artists.proofprofile.net/proofs/artist/00d245e8-8e8c-4332-a26c-84d76654399e.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 0x7aa1a3a586fc643b254b950bdf42664fe5498329bf84651cb1839c9024a91922. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UK3AZ1614891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cc5168a46048c90685e718b3db05c37ba53e19ffe00401b9865038b08bbd7d. 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/QMGR32045998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178c5025190fcd7f8323dff54813f20ab331b3d3452aa386ada5008edbd3e17f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJZ2352613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8295004479db546e150a8704f698584a799232369a312894badfdd6888dec94. 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/QZNWS2475879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc5bac106349d8e4f7ceb8ffccfec6084075c1dcba487ceaa1d6061b5bad2f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZRP42411891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc5bac106349d8e4f7ceb8ffccfec6084075c1dcba487ceaa1d6061b5bad2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP42411891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456b8bad39111b693b485abd82de9d951949e954fb5ba7b017e4afc723eab058. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92482659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd355a0c76618c2cea5e6639fca3da304804ddee0c640d67d9642e7a800ee8c01. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92482660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7232955daa9835fb6f4e53b88b983d0b78d5e98de39d6be8338768bb85ade5a3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB92482661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007286bb86b7251ba7b1a91e5884323deadb5e094749eac15237c04f9c3306a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB92482662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8295004479db546e150a8704f698584a799232369a312894badfdd6888dec94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2475879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dc31b900da6e6ea68e5912cee261a47cd9eb91c54e992b27a472d44ce79f18. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92482663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfe2cad48ed4336ce18ae42ff7f7d02dff1c5befa6984e3250ebde6a0565fba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB92482664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc5bac106349d8e4f7ceb8ffccfec6084075c1dcba487ceaa1d6061b5bad2f. 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/QZRP42411891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8295004479db546e150a8704f698584a799232369a312894badfdd6888dec94. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWS2475879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076269ace846e534d49e585319aa5625e6c1eb1d5e2baad93ae34ca2308f2f3b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:26:15Z), 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/QZTBF2562201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd04e72705806436922687a4ebfb1592c8dd0755a1d4b2946137e8d473f4d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQ4X2300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d6153ad52405ba4ec44161895a90a8eb2cdbd68d3347adac6d87951166b6df. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UK3AZ1817838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cffc5c598ae9e252ffee8e7395568e57ab6a1ff5af12946b84a0a006913c02. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK3AZ1817932.