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 0xb1cef4e30439ccabc62aaa95e748c2e5dc5436964d0f4b1db7a85704da31a470. 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/f19241c5-49df-4be6-a432-4ebb3e00a957.json and https://artists.proofprofile.net/proofs/artist/f19241c5-49df-4be6-a432-4ebb3e00a957.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 0xbcc937eadcd767be49b87c3a0211b39da4d45f8296e69708bb25b17aa04706d6. 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/QZDA52435805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c55acf42faec0dfa9e908815949cd93d56caece6fbe51ad216c26f3fbfe6b7c. 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/QZWFF2368976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc7f9695c9cd3c3708fa2be9ea5f353361afc5f30f5f6f8e48c34ebfacf15b. 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/QZRAS2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e900126a4c6cde7882ceca9cc9a666bf6eafb8469520a42c278c6470bf9cba. 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/QZRAS2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c16f5fa44c60c6fb1d344f959477c27e1ac2b00df231411be1f2fc2776cfabb. 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/QZRAS2100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3464f9a9f54c6adc8fd3458e71d99314dd504cdc1e6e2950d527b3638aacdb81. 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/QZRAS2100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78d1b23322aa0a6e468e18a6345bb6bad35e6a14e18de8575c424166974a420. 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/QZFZ31930361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4702358652f682c815ad664d8cabb78c044cbb292052ba5edd4a960e8bf7089. 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/QZRAS2100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6554de424ecf64a45990bbc3a19bf41a9ea97637df8f6b20a6516c018c6a80. 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/QZRAS2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15108624ab2d3c4b397173750b9439553ce78c4b2f1ab5501d38c38b3499c05a. 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/QZRAS2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd992f980d6d7506939ef3446f7cf6812518647862ea152205e51c429c9f5706d. 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/QZRAS2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6faac21c7d3e1ff0bc92deb04b99dce85b081588a4d0b2378370ef7c703745e. 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/QZRAS2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4f5b0c91d03f33b1c8d6236e9e563204f6d93575f0eb2d11adb5adcb4cf0b0. 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/QZRAS2100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf47cb72ebe44f7d27d5ed65e17d407e7c10e695d2654292ae64b56b59a61fb. 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/QZRAS2100113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36253d6d9eacf76e289e2a5cb12eb1e24541673ed8c95124df3ac4066660e806. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZRAS2100107.
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 0x2fca739403b20e71d988b9732d10f183e050bc6ccfc7fe91100a14cc61c8897e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZRAS2100114.
Aquatic Ambience (From “Donkey Kong Country”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40060b45b5cc87272611c0fd89f420972cbd13b0801fd8ef89cf9280f0e0117. 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/QZPJ32332654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8ec235b1ecb6773d922a289e494e0bc10f57a3d917c86e3d60ed264ebe0c92. 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/QZHN52326987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6d6e9c8ef0ce5f25fd217f0f4c379f283165b6893295fa4055cdeb342ab5a9. 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/QZFYZ2039485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c0ac815dcd695037465d822899e1ba929af0843b0e6c2751bbca4220f3e7c9. 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/QZNWQ2083646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01530d76276f2f813387e52f15ac33ad1e3f1b40c1b7eab97f13f5ce6864565. 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/QZGWW1995834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b51b0328180582fb414c8caefbb92f26902137e0a5b6745c76e0518b3cd8b8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZGWW2142437.