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 0x336b7ce9f0317c385a799ef0a985a9fc33bc73caa3bf7c9509dd752df47a653d. 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/88071845-24c4-4f7d-a1be-51f6f3c2931e.json and https://artists.proofprofile.net/proofs/artist/88071845-24c4-4f7d-a1be-51f6f3c2931e.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 0x6110e002c9397ad9ff7ed4fed396ce92edeb0d13a77c3fa101521e37ab3c2223. 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/QZ9Y21724086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1314722b1f4a67b963bd00194e53465e04d437d2311a362cc5d521a6236a0f34. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZDA81884621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930e4c9187c1f4435fe565e70f38512019d82472e20482524c2209052e94c2d8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA81884622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f0ec69b683205c4fef4e47770c8560f52a4db364083ffbb2b222d6f6bf3eed. 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/QZDA81884623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678127b6e7b108ac2c35975c9f635ba8fcb3a27069b66c3cb8511d7619d7cdae. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:38:39Z), 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/QZDA81884627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00ef908092e97bce0628a0944c1c4f5c26c1493d7352c36c92b2f08408d2668. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZDA81884631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1c457c2a0e6d007f24f4582e6865d0621d87d6f3f3a15dcdf6666c4ebeb557. 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/QZDA81884635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ce2dab0f4493c9e4f8f2c1b493145e39795ab971d9cb03915af87c729edb9f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:09:42Z), 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/QZFZ71988137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077077fd1fe4d10f49ba56921415d5fe4696b9ecaf356e02490eda2010de138. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:43Z), 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/QZDA62074714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa172998115ad46a3bd6b5a6319170f75e7d711565ef0d2ea349bdfe6fa501bbe. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZDA62074723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaa10d67460f887cd93843e5bd08ec1ab41400fd48f97bd713a814d2989e1af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA62074726.
Grass Is Greener (Jep's Big Spigot Adventure)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2e623e0b7b583b6f6b2a6908ac1d24bd3f914e22218c8d7cc2611ab2e62ceb. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZDA62074727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe4e63297df2e735e9d92efb86aba3691025d2b83b3f878f64872a49b06c242. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWS2003896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ff0af0bbc5a45cf8c8650c3f151c047aa005879ddaf71d04348f53c98d6c3a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWS2003897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c92b16a1ef0063bdc729a59d06b2366eed46a37c442f2e88ea0cb6bbc7720. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWS2003899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f65d07c29e3e380a94b975a9411dc7522a322f81c44899bbd118e5796d5eaf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWS2003900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4732b353460caac8b982a053316343d839400e951c541875ece7a1067fd94bf8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWS2003902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52c9a9babd7314c5f76877b922e72dff57179668525d6f7fe914b2b214fb061. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWS2003903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c3187d6a34ec79985117b10888c51a00803c2d1c1a4ece11b9b8d2b331d979. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZS7J2283815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36003753ab2caa5d13be6c3c25c3967efd590be4c9e811ff38700f3eb2cc28f3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZQAY2328584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce1d8135e79804028925742dcb34f2b958b6a4dc35ff18ca2243b58be6b890. 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/CAN112400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a39708443d8dc86b595fc571c8624a33fb8cebd61a11dbe8fd458e6a6886f9a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CAN112400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d819e126f911260ce4445a1e8d26b8b64df929ba5b42d75ca2723919c20258. 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/CAN112400846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce4a86452f2fb4b82ec172e9d1ee1604393876356e1532a5e0abafdeacf836f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CAN112402236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafb8ea07c787c0974789ceb8b5a8e4d8c01582be42cac3a545caeced3572f35. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/CAN112500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f597440706307f0293fc79e5bc023bd8a45c1018c8f7364769534e08cdb0e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:05:58Z), 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/CAN112500980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafb8ea07c787c0974789ceb8b5a8e4d8c01582be42cac3a545caeced3572f35. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CAN112500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6451391fdb65e59db3abedc754fe2bd339738310584f5aee884deb948208c20. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAN112501083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f597440706307f0293fc79e5bc023bd8a45c1018c8f7364769534e08cdb0e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:14Z), 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/CAN112500980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafb8ea07c787c0974789ceb8b5a8e4d8c01582be42cac3a545caeced3572f35. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/CAN112500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152d03fcf423edbff550c47a5d1f646f08ed3780486f471a0b0a28ab93fd56ec. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CAN112501265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf71584ce39bf94af03b1f077fc2dd2e07e7d1637dc5352693c2033c980e64d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBDNH2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814b182094f1320594157a511bf5048947fcae71a163e023ffd0260d05e44c95. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRU702100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead091c00b299d72c66c1d12ac784374b7ee233d49934718c97902b4fbdd734. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:22:27Z), 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/QM4TX2166216.