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 0x80e08a627daad5312cebb709cdfa043e19cc98f58e384da2d6cd6d820419e43e. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/566e4f19-00fd-4ed3-b2d6-82db098c8e4c.json and https://artists.proofprofile.net/proofs/artist/566e4f19-00fd-4ed3-b2d6-82db098c8e4c.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 0x876a6689efcbf1c84f262b4f6df8d349af888adf5eccdfb8f7df6b93b2cca7a9. 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/QM4TX1527574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0d50ec9df2b3685ba1d684bf6139f1d7ecddeed449c2f2c3da4901f85e3aca. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM4TX1527577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bf1c775428c4260e0ce37ea14b71dc0ba095f132778552650dce28352c7012. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TX1527585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de040590ea8b9c9ee6500c407246abf32c036194f25af52a7a5c284cc07cb57. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QMFME1542511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85515bdab8de95d1f6bbca9f548ac86721f6daa09841c590cc949244df3d18d7. 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/QMFME1542512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c3cc7b951a9c615a02732839af09b07599336b0fe97151a9f6ebe95fb48457. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMFME1542513.
Ich Bin Ein Aubenseiter (I Am An Outsider)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccfbb8b41651e310a0ef30c5c847b61c52e87035bb964f5153b8a8ea417ebb5. 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/QZHN82411354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e59352fa158c58eaa67d15ef0deda32dee51152d41ff2e61faec21abebef533. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHN82411355.
Die Hand Die Verletzt (The Hand That Wounds)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd3193045fcbaf0ef4420188c8b00176d9ff41865c5688c7eec84740ce0b089. 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/QZHN82411356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99741e8d3c2ae1c8bba6538e9eb99696f349d6e31520e69e5532d6f080ac727. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CH6541732396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1d0d594975b639760ef6e2b75d4c37c586999def56963081dd84f90e5142cd. 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/CH6541732397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5874fed3708ce4f69c6bbd1458056d71d2404ac8d0ea2d645a7f2c416f2cd061. 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/CH6541732398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31147553350e4681fdee96a0a27766d4065417ac6dc66df54fd2ec4594f41607. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH6541732400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2616e2bc7cab502fcb592f1ea352dbdb9a5fde52b8e000ac02f0762bdba34e34. 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/CH6541732401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cf08e48abe0e971615e86f936147b6c70aa2c89bc2eb8dfbc1bd7a587e7a8b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/CH6541732402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b4f2318a30508c3f8017c51967a7059ce7f36a5b0fe5901761c9fdb97f3f3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH6541732403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985fd58351c7b2957a660ed7095990b1a308e005bbf62802f2d9364c7d63cab2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CH6541732404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6c480aa074fe70bb98977f77fba7f5d23308322596af47735ad3279c20cf32. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6541732405.