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 0x4ff1750022762cbcbf70d5e11b3c591fab1aa1affe89ae745aafed99ae60350f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e056aa2-94ba-4e76-b54f-9702b1cf0341.json and https://artists.proofprofile.net/proofs/artist/9e056aa2-94ba-4e76-b54f-9702b1cf0341.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 0xe1d93a99e810910c0cfc13bb50c43c74e80f048c8523259900396a34720863fd. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/UKACT2030496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30675e73ab4802cd6d1134f7ce02b6cfae64558c008d0d3e748c5112f0c3ccf. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/UKACT2030495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d2ba568f05811b556a7d83f9b7a37bcc5a7c5a515725ecb50b17f0a3db7b77. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/UKP3G2000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0755ed3927778b6412d2e24873d03d909c7a32a017a601bc6dae436d45945a67. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UKP3G2000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d373e42bfd1b40f5a03bf6da70f896e1eac0424058fa60ccd6e0fea5aaaf1ff. 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/UKP3G2000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08994d5caa57157405d7df84569fb6e6b7392d3b328fa94a8677a688c5599207. 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/UKP3G2000519.
Roar! Roar! Roar! - Despicable G Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ac57ffece3e33276912eee27f2f59b23a3950fd316f9156699587820644f53. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/UKP3G2001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b4ebf9f2b39b7ef7abc006916273786796001600218d7506dc424b707220e. 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/UKP3G2000522.
Helping Hand Song - Can't Do it by Yourself
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2720b94f322ff5bbf882ea9e293142dee78f13235c7ea959723aca834d9351f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/UKP3G2003102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c4be078a9081cf72c2bb970cbd547df6a690e475d0995d46a316a5abab2312. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/UKP3G2003070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e3d7f4b3ae1e5a6a91d4dc374b05cab1f1479a423d47370f5be6068b7b5b8c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKP3G2003768.
Pranks Song - They Didn't Even Know it Was Coming
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf124aaa4b3a64b501e946f8c49838ae42e1e607dd3ac29e8ecfb1df9c39c954. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/UKP3G2003769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c53acfc0b803f28e24906c21878050ae3283eb80920fa2397417870ee028a94. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/UKP3G2000521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d2ba568f05811b556a7d83f9b7a37bcc5a7c5a515725ecb50b17f0a3db7b77. 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/UKP3G2000516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089426b665f147371f2d08b33e62699101eb747288f542a5455f102c2f8d6cd. 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/UKP3G2000454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc590f35123889ba2b3f2d7bfa454f0ce113b7cae0af12587970e8bba3636c9d0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/UKP3G2000455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d93a99e810910c0cfc13bb50c43c74e80f048c8523259900396a34720863fd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKACT2030496.