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 0x9d55febe4f59270ef1e2a0bb4e280c667d14cbf2ab25f2b37e8a6f238745d374. 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/b4f7d3ae-0103-4ce5-9de5-29fad3e32973.json and https://artists.proofprofile.net/proofs/artist/b4f7d3ae-0103-4ce5-9de5-29fad3e32973.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 0xb204b23987974b10e4f6538978d5879305b80e73a6279297d5451cd91cec833a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DECL50700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cc6661b5cd40d44523635f3e4cb4e4bf6b648834459ad107af4ecf11a91511. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DECL50700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a61a7dc5e51acbccf7e674a09c89519d6bb4d6031b45658415243e44954dcd. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DECL50700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9a3c330ece25b854e719f22824a4f7762e97996287c0a9be7b36106c7f145b. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/DECL50700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316f2257f18088aeb23499f69ed7dfb6178813db4d64d56da6d2ad9111f27d62. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DECL50700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1946337db5e69a8ff7c4e9890fdbc1d0d38f6c78e3faa218359f29ce1ac665. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DECL50700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc5c9d2592f73458a68a59433f216bcdc9ca7e98e4c4920417c934520be7ad. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DECL50700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c993346a56f8f1becd06a4d4e7b15367eb8c412eed354602d38dbd2b4acd918. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECL50700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79757fc47f53d917c107852ecb77a3b572cd365c115e02736b3ddd7a4c7c0f0. 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/DECL50700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c47314f122eb9d6dbb41a3d1292b7a603d701d01709b8b45032de36e893f9e. 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/DECL50700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7541805a6f7044e203ef4e9db7daa53010f8d601e5f26ad10de288057263bb. 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/DECL50700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837a40d4ce25a9d723c0ff56f8dc57c73209d920f840a96af1391157cd2d17fc. 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/DECL50700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e05ebd250e56a455155c33175dcef65cbb3dbbd0023e91fe6f21ece6609c29. 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/DECL50700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cb72a1f73bc11a4dcc82fad60095ba5d0d8f06d62bd10b5d018c65cb5dc364. 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/DECL50700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965a1d816bfe139c0e760ac3eae75ac288cf10f3b87db92e87a7e1ea6e011915. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/DECL50700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb08020581fe282c048b0ec3383d0149a6ed4ad270f2999da9c23fdb934346c. 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/DEC610701164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63650b23128550f967a8fde15507668cbc7853843b845f9b475c000e8b57783. 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/FR2X41736415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ef8bbb14595b04fdac2f5e5c02631b62ad5470086c33353f7fc85bd28e85fa. 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/DEUE81500053.
Blut, Schweiss, Tränen & Triumphe (Remastered 2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dae8ca880b2a9866a9a38fe1de6d8f3985fd23c09e347e79c7ed759cf4fdd7c. 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/DECE72000140.