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 0xdf6f7c57d4b4e98896be8b51db82a911dc6333de7d700b625808cdfaa09751b5. 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/284e2eb5-0541-4ef4-bff5-c23b4f413d0e.json and https://artists.proofprofile.net/proofs/artist/284e2eb5-0541-4ef4-bff5-c23b4f413d0e.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 0x3c294ff9a3993bda0a97746132a6a86fd8c56f787e1104b10daa9785f8003e40. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEUM71201724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3e4d6f3d9483db2376910e80eb43c21a5536ff239bc2a8228578b5cd635341. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEUA81500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd370aed1ebe9769a39b4ee5b7da03efed2a4c0f4ce06f2494d8b0b06989dd720. 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/DEUA81500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b0115c2f12704abfdf019515b83a66deb6fdad4db4e780132198345dc675b1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEUA81800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fd42c85cbd833187145ab7e0390173738505f085d365cc44181ede6a9f93cf. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEUA81800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66bde166f3faa55e33497f32d02816c22fb67688bd427cbf4de5c6b65c58fd. 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/DEUA81800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52f8ec08dd0c88b437369154072d7415333c11e0cc3df3e0ad670b84e2b302f. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DEUA82000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bcc4dbb0e626829d8aafa17acb1a96e09d9693a4cfe15e7d7e44bf6ff93466. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEUA82000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd318b35944f65f2193cd6bacafac076963ecf23f585e213a0620807b25aa1461. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DEUA82000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8b838e928dd401d43500137cfd1c5d39afdcf289c877406ae7becbf9653f69. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEUA82000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe8935c0a463822dc829116a87abcb569c96d12602c14513bac56ee5233ff88. 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/DEUA82000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d95fe8bb72b7d5d6bc89edf3d6fc6968077dba773b1187d48f8fb30c15ebde3. 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/DEUA82200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9edaa94c21acf5d9802b219944affe18616d3dfd928532e708b615ec48ad24. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEUA82200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bf63d1e6dc4bca5234e32c6797ca4530bb4cf68ce8ec09b4fff66bc1ad6197. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEUA82200011.
Wenn i kannt (I tat's dir sogen) (feat. Ina Regen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021183f2d8d59c8debabd2be12dc23d812d7f2eb3581f3dd857e4d1053ce461d. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEUA82400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f893a1e5fc70bb012a86ece8859a9c473020626b7fa0ca7329cc0885d7fec2c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DEUA82400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110e37e775be92bf422d7cb6fd235f40d6a329ce37829a727d900a6229f80afa. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEUA82400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9755587f398172840a0432676bd68426b607ee7b28ebda760e8d3c3f7d36018. 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/DEOM41800378.