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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf1f4a3661bc5947d0d4af5d99e93e75882103859a3616851b3596beab35e2e. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f631ea41-3f47-4bb0-8837-66a4c9bdfaa7.json and https://artists.proofprofile.net/proofs/artist/f631ea41-3f47-4bb0-8837-66a4c9bdfaa7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
World War I - Centenary 1914 - 2014, Vol. 2
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9b4c95ca91834ac2ce39e1c3d0a5c869a4018a1609d01e6d72d0b62d7ab109. 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/DEB639905701.
Du schaust mir viel zu tief in die Augen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b862fbcdf27029446240513124b1c02d3ab6b54702cc67b3ac37997cd510927. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB639905711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed0ce76c4031108cac7248afdd7f9df5c085e6598adadc26191cf74e231f2c6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB631179001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c9c0ad1903ed4a1684092b60b8ef757fe9b3c4f147b680c0503e60c9f016db. 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/DEB631179020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f195e48ea5f5c5b1ff332a9749fe3fe04b55e06ba647f43ce46f208f015c1b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEB631179033.
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 0xc47b446c493481128860dfc5b9a3d35d42db012d163595b2fabce655f4e6e685. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB639801901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b904eefe313e280e1e787ae3fcbcb518d589669656bf63f653335bd2de6f0a3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEB639801910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0038347636f285445829f6c43036479338c6b652d0d632a5380e90eef043766. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB639801916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c7863e77087b5a88f8ff68f9cad26ca51fb9b2e71418411f87e49344051d81. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB639801932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2d34a1ae4c71501a2625f181d19769692b10e713579441f140cc53b01464b8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEB639801905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa138c735f75f765129545633be08482c5d2515206fba60dd7d4fbef1b69653ed. 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/DEB639801913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7268a61ad6ef40c8517c6ef669e1a87f969ab60466164958f2374260ac5f4f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEB639801921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b948e346bcff6ee3811c242a0295dfcc12bf0dc726db8746702bd944ab6a0dd. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DEB639801924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4bdf01724ac8b9482e7306bf0f54da4da669bb250ec74323c93c1b5d85de7. 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/DEB639603501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1f79bae6e686a074591053567065ca68f220df0bdf75f192a83fbddcfe0ffc. 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/DEB639603504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978241c912a2e237fd41118aaa60dea7ae974e3b85429651a0b4180ed1bc9b01. 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/DEB639603512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec28afae481c3f71ddc34925e5df35703b83a22cdbc00daa738266d5de561b71. 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/DEB639603516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b85565336943be1feaf11ba8f21073c39049fd72a20cc2d0a9e18d276a3a3f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB639603521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81996b9cf3f12d62a68a34634d2a6f1c1df26281c0c00a57980f6ab7e236b424. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB639603525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e32532042269977cc3bb52e0a0bfc38e0aa6404c5bedd74e00ad8ee09e2a8a. 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/DEB639603531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c13262728bbc2fc04f541fbd12710a52c49ac6300d92e9a1fa7307f045d093. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEB639603537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7700c03c78da65322a04c8c518edb866c3814d8e0425650152f92614a3d80e8b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:56Z), 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/DEB639603541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca39ababad0729d301065f92ae4a8bddfc8e9ba044333b61862de01850fe829c. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/DEB639603509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aafe026297b8fcf506885746ab603ede98e3afafcf8d2db64aae06824cd132. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEB639603523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0d9d363b166843d71f1cc0d2deca9cbb5bb2a8143a08e954609ad27ef78856. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEB639603533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cb862949864285c29524c6eabab53baf82926b72738800cd5a5437fa5db060. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEB639603543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96359578ab04192359aab5e1baf6d60d77df8dc9604ba3da9c0a40581be2cd1f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB631776505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea04e1cfeb2034e651638e237057d44f82106f0de4b975951ae9c6e61081c5b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB631776521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf450dd85c0619c3ff0e285b4fa465c1dad8417cd511d37bd8c45b94c02d89efd. 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/DEB631776527.