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 0xd1d4cdbd5c50cf5d6dfdf400b4ce25bb1c0aa76f1c6afaaf936a6cce30c8f16e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d892d95c-aec4-43cd-b7f8-d0c2cd69aeef.json and https://artists.proofprofile.net/proofs/artist/d892d95c-aec4-43cd-b7f8-d0c2cd69aeef.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 0x756d4a3b6e241face1236554e2b98ed2cf024c1ac8eb01210cf3f492b7c7dc35. 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/GBKQU2318318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2eabbda6f15673496c691560fa151fc51de72654eac3e80483589e4741324c. 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/QM42K2382326.
Sonic Senses - Compiled by Dhira & Z3nkai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bbc3d7fa9534528a9bc675e19e4416e7d441d8c08b88c05a7e64e9fc986d10. 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/GBLV62015167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5085846d786e3fcf2ff3d70bf2b3927283510d71b34288685eb619bcc1f6ff1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLV62015168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf262fac63b7c91e2acf00facc82cd8f92851ffabbae8e66579d4f1138162baeb. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBLV62015165.
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
Digital Stories Book 1 - Narrated by Z3nkai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eacd6fdd3b9e4c86038c77c1f9ea0e729a63f303cb1b12fe4fc0cc5be2935d5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2413616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19d972b632623268fb80caf8a95a5ab2d20afbc52f182da53dfabe81b0694e7. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBKQU2413613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd715e5a3060af0412cfff33108314e31a9563c752d6a080d2a4c5b02efdd9cdc. 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/QZS672277892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60f924058159392ef4464aef0e00c6b18e7cb520209ca62b70ff534af7c78c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2418370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a33c533fff4191e360087612b01828f77aaca534d5d57cd99d0306cbb7328d1. 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/GBKQU2418371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eac454a41966293acc388d1f0c00264c918ceef48e93eed33a9b5cfe67c755e. 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/GBKQU2418373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af3da113388d764157e675f48e8dbaade7fb070bd99e60907db52b85215ffb7. 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/GBKQU2418374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7350c40536ff993e203d4eb0e7ccf2635ff8fa7549295620b80b50b0d6af1d7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2418381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16d0cf288149cc996674e01129e9fbd988c03d89eb5188886cf0a33f8298683. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2418375.
Loa (Compiled by Djane Dharma and Elfie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a2f52c86081a29d196dc23998ee48a59bd4458679da44a8df7785e21e5d22c. 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/QM6N22307876.
Woodland Critters 2 (Compiled by Steven WooDog)
Wicked Illusions (Compiled by Djane Dharma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8bdef93534e27ee1d1cd4b4021eb159d212942d1b939e8cbeaa0575c69c1d5. 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/GBLV61912126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6323db05c8fb7441110a372840398da0c0ce5f8fe434dd6ccc4bd69196614f3c. 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/GBKQU1897480.
Lovely VA Compiled by Mademoiselle Vitale