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 0xb6160775ff1831146358bed7e80d84c0c0379f50d6834122bedc8b573fd79631. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1877561c-72b8-44b1-90f5-0f5febf40d6d.json and https://artists.proofprofile.net/proofs/artist/1877561c-72b8-44b1-90f5-0f5febf40d6d.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 0x0cfea5a0748275c71db773ea24e76ea6a3b51ce2e3d414bf947d892c05170ceb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTPX2464564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc08ad8c19c4f766167f1bd4178c8ee54a12fd3371f13065f2a4b0845dc57bb. 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/BCLWS2500292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea943deb04bab2a4c323f32ea77d9615f1d6a4199b4540c6c0b4a8ff4f689e76. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BCLWS2500416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4246e6a32c372fd4df7b8f3d4bccb441ed6234cbd7af541ae7b9451659492315. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BX4IU2417505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961ebf622b5889769a72db18a740ff7f34b7a379f7afb121b3a62da1cbcb35e3. 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/BCPQB2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fb20efd6dd40a854c8001cf9368f8f4a9fa3645d15259664d2b741cdc62094. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BCPQB2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764a08a8af53c99579d5a84e20964cd299d9a46d5829b2bec9097010679d3ab8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BCPQB2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbc9dabcc00e893018172357e10059b3aa00bc0b6a2091f9fc226c1708e00b2. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/BCLWS2500662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd907d996f331f645f4b4ba2e56cf78d241d7c8fc073e04b212aab6aa6b456820. 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/BCLWS2500669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad94b4db127610ff3602afdc7625e0c164babaedcc1655139789f43272142d2. 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/BCLWS2500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2eacdddc1811c5ab842f3fa9afd325369bc60cd76be1db3ca2f93f1901fdaa. 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/BCLWS2500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6181eff23923898f088361f1a6da83aaa0cb66e08473e9664a466961938cf272. 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/BCLWS2500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410f3234fa918d1c1a1a82dbb6244caa3f85780f080bddd68c808f14d6228d2e. 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/BCLWS2500294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec53e3e4728b0ee6aad6166ad66d11bf89e5b01a5b7c02ac256cfa8e4c6a974. 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/BCLWS2404822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5ac7fa9d162de2df4f6246a91bd079e5d383110a5facf6ab10d85b37173ac1. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZW9K2488371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f432b129806103cc5411b14ad712afb24c8330112688372796916e3ffc914a2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BC7MM2400370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b0f97d185b2b141b7b86a8173544a9a816e24d34bdb7bda2ea74e9ebaf793c. 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/QZW9K2416387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b4ed70f78ffab0e61c61633a57bae5599d97503868a42b8d7c9cea71b092b8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTVM2421468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079f265284fd77a876a6d9c830dbffc28088808aa89301364e99c3f9b0325eb0. 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/QZNJV2404806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fc939c4001da685ee1008e3373edad21d34c2f324ad7d7bf65aef6a8247852. 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/QZTPX2479158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88430d843aca711d47432557bc75f51f502123768b5c967c62b303d7d1ab4863. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BX4IU2413948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc3c9b38e00f91838205f1b3aac77a09b88b9c7d61d48dfcc84b3ca3cd29f27. 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/QZNJY2471185.