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 0xdd1bddb71ff5000b0ba79ba95fc55ce43fa6f6a3fe7e937da2047dd96ef7a600. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86725932-c406-416e-89ea-1210c371506e.json and https://artists.proofprofile.net/proofs/artist/86725932-c406-416e-89ea-1210c371506e.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 0x19cae47ed35b1bd1c30d1cbc4e800dd75b6ed8c5a4f6079e371c6b6c371cb81e. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USX9P2067065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6219a2c7565c6aad6bfa91f584df42f19da700e6898aee8ee981813c15a3200. 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/USCGJ2112058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0b8d982def0ac7856f48fca81f51c8ac82beed1a3644f9bc28ce4f495fcbde. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USCGJ2335933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb3aa7474d4551f89321fc26a0247339006a2c7b7a5ac1020b3f49b73e89a6f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USL4Q2491555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb759b7418e63db09a3261e5c31b72f4aa227f7d582217e89395ca02ba765bbd9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USX9P2488853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298c29dc6781065dfcd13a6b8d4b981e3cc3f82a1a6ec740a1e8618343cd031. 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/QT3TB2401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd741612c92c7ec47bcf7cf6410beab01e6eb35f33a64f70fce5ffdf778585610. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USCGJ2504072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6997445f4ba3cd8675b77cb800fbb9807034afdfdfae6d4c4543c43d7607f2. 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/USDY42529150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89abcfbb6ebe9fdf17105ab0c72fefded59a23ecc38eaabb659a7e5e25928bba. 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/USDY42566045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dcddeabf90a9c404cfaca78935a6905250641f0cc0ce3a14ef924c60710d47. 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/USDY42566046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091c723af97a367c47ffcb16a57aa7a6532b1a73d6cc7ecc34781d3f80688168. 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/USDY42566047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5a90bf84c9e91081b6c5f0186eb8fcc3f496b2cdce360996ab066a55c84d46. 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/USDY42566050.
She's Gone For Good (And I'll Be Good When I'm Gone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2432c8037e1528825eab0551c52d93d7165d837720d4eea59fb5f33f0899aba. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USDY42566051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9f20da8c63a978db2efb4378e6ccc69479c79e60cc1763f2a793f06ff7b51. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USDY42566052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb951c36657a2e2efd7c2a1ebfdb0a03bc90f4cd301676a96a0d5492c947008. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USDY42566053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418f4fc0a950dc9cd5fa9b51308e038a5ad2e662e7d546fb9ef025c360063eae. 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/USDY42566054.