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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31160d48eae635a0422742394299a8292277765c67d5f05fcb45e4d422d3f5b. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3c45c5a-3dbb-4bed-beb7-9302db1f19a7.json and https://artists.proofprofile.net/proofs/artist/a3c45c5a-3dbb-4bed-beb7-9302db1f19a7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5913b203345c6f958230926727dc1584e9d42011e0e51e89f44bdfe466c229cb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM2PV1895619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f81a832d8a542e66e69d551dd46f00c6667a2775815201d550108b7f5852bf1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM2PV1895620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2216593b68aed86c59123f115209c05817f2b56ca9a7afa35d8fd1122c52fd13. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM2PV1895622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb2bf99092ab2c52d37764fd0657603099f9007341f35c10b3d5ca16e6d4ba8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM2PV1895624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd0f842abc00799b04c337cc32d3798cf8520c985546e01dd6d0faf5925d0f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM2PV1895625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215f73f17ed4de644a08a41564d1dbf2733bb9b0cfd1aa5c5966796824c41ad9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM2PV1895626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dcf91ca410b5077f129424edd04b4e89d3cd0bbaeec135f311cb6426177fe7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM2PV1895627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9698d24d58f6eb644d7118ff9a9856705cff668382f92ccbc4bc861038f8bc2. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QM2PV1895628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834e21ea00229af9a019857ab349fbb452257aac12160f147d58da8244739caa. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGJ1416045.
In the Middle (feat. Rick Watford, Marcus Anderson & DJ Dex)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680005e2328f667b161c1a8c33287dcc14025be24612dc0391f52f4b12b80726. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1416046.
Nothing Too Hard (feat. Pastor E.W. Whitfield & Marcus Anderson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf540023bc8f2d139cabc73124666b59ca3c1e56b1155d8c52476fc9e30a468cf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USCGJ1416047.
Break Every Chain (feat. Bishop Paul S. Morton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe702fffa9391f1d714182885c4f119f2896a1e424f817bdcd06542973235a09b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1416048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c349ad72b795c6c4c4f11e41072d9ea2e210d8b5704fc8d13b442ec05795c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1416049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004d2b309000ab45f813601009eff6eccf3aa75f187317db0a1254c2f1598e4c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USCGJ1416050.
Rev. Pacman (feat. Ray Marshall & Mark Lettieri)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2874a79e46a1b4d361be68fd8962f878eaac75b41f4a64d1d3706b329d081002. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGJ1416052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df3032f795c5b326d25af58ecb5977d62d5bcc73af5dbd4d4d643c71178547d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1416053.
Shout Bump of the Year (feat. Rick Watford, Devon Stixx Taylor & Wayne Thornton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8359949b8cb1c43be8810b4a302fca08c87200a590cee126721ec245e5211903. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ1416054.