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 0x3f4df03afb4fd7fb1074c14dcae3e7ec3b6de1236c4a36454778dd0c212502b5. 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/9b9e5f0a-f6e5-4111-95d1-244a735da8bb.json and https://artists.proofprofile.net/proofs/artist/9b9e5f0a-f6e5-4111-95d1-244a735da8bb.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 0xe6788deb40e87975ff2888a45c42d73f9767f585a711816a8a832a665f982edc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBSJN1300472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0799b1ee66729b88fe2d8546fc0bc29296604e0038a0bab16a63285103a9f08b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLM7H2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8967bfb22a6cfe74f3642a7c474ea51655af99bd315acb84ad65f53a70114f4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:08:04Z), 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/GBKQU2235523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41754560b6b6b16f66a26bbb5280d1d7a5cb7309ca8cbc49a20a984a4afd8e3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GB8KE2313604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab68e65038e3fdfac2b02b7b77de20c46225d31c8ff731884ea9a963d92ce2b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X42449900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9b11c352e7f936cc70d546270fb7adbe737875d10f989534d818477339c8f2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR2X42449901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854666856a86bb5ac172741343c9922a337d49eefc2683c83d6a1f7c8a26f2f1. 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/CA5KR2502815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044ffeefc90d72df80e108ff4a9308483f1a025e7a4ca41640a3fac854a8fea1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2502816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669fb0862458a941b8409ca93153d9ff7a7353ab074e896122b510e17650e54c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CA5KR2502818.
Pictures on Silence Repainted (Remix EP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49190608167a69699ff5adabbfe95cba1d8bfad0be3ae37cc537d6e1d9714b4. 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/GBSJN1301023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582f854418d88d1adb16311cde6c5c4393baf247f8ad88a882e97f462ac2ad48. 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/GB8KE2051886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5293d3f2243b5b9e47a35e1f4e0b7b32f0295b44de858dc0070ca9e693554d10. 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/GB2LD2110351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5293d3f2243b5b9e47a35e1f4e0b7b32f0295b44de858dc0070ca9e693554d10. 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/GB2LD2110351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95714a41939feeb5d3942508214b72a02fbbd0890cf1afcc520c700146225732. 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/GX48Y2301201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0799b1ee66729b88fe2d8546fc0bc29296604e0038a0bab16a63285103a9f08b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLM7H2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851d1dca03612bfb48c73d2dd9cb2f0490eb07c61a9254b520d1194543295543. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKU932390066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0cbab566fe67006aacaf0ba5720794e354e3834eca58ddb2d05347e016789d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CA5KR1502338.
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