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 0xf4894e63f9e0df5b8d89b4342a1905c5c4d899df0a317baf2ad488a55dd82007. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/242a6d5d-5ccd-46ae-93c9-1586fef8a8d7.json and https://artists.proofprofile.net/proofs/artist/242a6d5d-5ccd-46ae-93c9-1586fef8a8d7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6224c330e972e214ed511b42eefc0294da62f26b4edf3efd68587e2f9361e1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7282327375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc58901350cc06b4448ccc514dbf48074777d2a72cd4a04628033f174662205d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7282327380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320b32fb0604627ddfca88e4126350a7f12f940a29d826e37a43f5ff109d4347. 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/QM7282327383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e5b0bbe7f6fcfa64a59f1f8772f401a5c668be7aa8e8ef5f3b6d8a0ba85a99. 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/QM7282327388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9697172486a6dc3efaa7adaa8cb915853ff3e399398b10982b1bb955809f7a43. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM7282327368.
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 0x962d3baf6e254279eb788cbda821705b88b8b9d3f445ff0f690eef3d3a915da9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM7282327391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbab6d4f2aa639c6c1fe882e280d05520ca4930a576d10a3c73f09325007c5b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QM7282327393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac2e8a7340189ccef6eab787f05c53eb708be6d4f19950bfb7561f641d914fd. 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/TR0362000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b16b0df667fad2f19dc395c976c721ae1344d0c2b4239fcf710f9a6581f2bf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0362000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41540ff5e6346f274693816ab278dc854621322f0c30ee6ca3f827d45e2d54ef. 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/TR0362000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73565100372b6fd914cc44d480f7300180d47d5730bf10121c6318625180f54. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/TR0362000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88374cb8de6f61e2f546395eacdc8c87d6975395ce6efa001dd3cfb1f7e6bc53. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0362000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaed1b1b8aa8a431c3992dd28f3adc1ac7cbc46564e9e8cd6b9bb64ec230d735. 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/TR0362000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fff288a8333028e7a6d6f456c55ed93590490aaf94b61fd4dee88d384f77e7f. 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/TR0362000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a00bd1045516f3839200898f67ab0d912f99c5a121fb8af78ca15de6b18bae5. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TR0362000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d579bb3b28a01fce8eae22d8e331e2a63601f0f8910866ece01d3924e13c39a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TR0362000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcecd0ae510b742bde6db6bcf6b9906f35a1aaf2e89bc745df2d476935955719. 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/TR0362000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178da493a40d4d45de9389cf66222d3c9a0db678f30a8a1c878ccd0c78f9d831. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TR0362000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60ec0ce7ff56efa4fad6d775146857f23758472fc9a190d4683a9b6c9e6de7c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TR0362000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df736717ac35a2ef21cb46695fbb3a833f7cd5bf2c7ce4008b4402368c8bf59. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA072240604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90493c343db051b425c11177e8f80339a9c3881827e6d2f83b70f89e515ca4c3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DGA072240606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1b7cf37b372a999b61d95397bfae315b445b2f70376c8039fe6891f95b0b9f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DGA072240605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beb9e20e9bd62e5de240d1af281ea4bfd44a2911088a44916fe98ee38991a11. 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/QZHNA2373592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eef4f0067b236519cd325d48f41f4778a31fed2ab1dbbb04e974f7427676ce. 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/QZK6P2362428.