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 0x8bc0b76643212afa5d5aa6405ca208e9887bfc2fa1e629e56e662b4da78860c9. 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/5662ce2f-0fbb-4e23-b14c-2654aa471006.json and https://artists.proofprofile.net/proofs/artist/5662ce2f-0fbb-4e23-b14c-2654aa471006.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lake Reflections - Music for Flute & Harp
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 0x5f3964a0564c161d123ea3f24d8624922f3609e90ba6d9836fc03ae847c92cbd. 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/CH0011500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a37dbbe07175cc5aa667c3b96662d5bd52e5c29cc79a1c0b5eac6d44cebe467. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH0011500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623773864d118b8abba3058481ebaa019910ade0aea448243592b97b837e4c88. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH0011500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa821e0805137d5fc1dd47ac9a8c40b410c24d89e21c86c9f2e616b34c6169bd1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CH0011500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd116b996eac1e918bbddecf588fad70555a1c5dc2776bb5be1b482121a8d73c7. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CH0011500092.
Le carnaval des animaux, R. 125: XIII. Le cygne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec11e8b417359001f3ab8916f36121714fe1f8daa7ba2b80cc2b34818f645b21. 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/CH0011500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235ba12d0dd5ce2e24e3b769226dd7a7368c8711bdcf4131f11841c98850e6a8. 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/CH0011500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad54b995a62ecee3fd809609ac2ac21873a16602566fbb31cd211d28da7a5dc. 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/CH0011500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6583f6d3e226c92b189a090a11557ea224ad79491c2fa9de094e9484ac9af6. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/CH0011500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334e3bc8e88c4ffe010d2c8afb7b0999b0ad81b287bf8e834a9ef3a0dd84e0f0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH0011500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197b20abd0f01c2e0aa3dc1df0fdb3b530a32545ddf169c63828a76d229d8b77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH0011500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89daa319ce1cb10fccddd4d3819209238655ffdc06ffab5aa8655da607affa7e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CH0011500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e34585e37f601ca06a25404d9f7f79344d63a4445d2167e59f26df40c54ddd7. 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/CH0011500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9faef6ba9926de2b0af86b59a0ec7749df7c856b8ee7d9f638503beaf7bf0d2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH0011500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05dbb37f909f9142f2454eb56f0422684b01b12ad71e98fc0dae816ddd49d52. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CH0011500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd99cee5c7fce989f4bf09fbc98f50c86eecf1e77d447dea41bec9e42808034. 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/CH0011500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284a73cda8f93e7bdb88f7d84bb0b66c26c510259fce31a232f5c6ab7b5c1062. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CH0011500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4d830d69c2c842ccc15f57d8a48ebb52e21bca06c8a2bdbda08b3fdb90c078. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CH0011500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c9631236545a9e808bc210721b7b3aac900802caa78f55b8e9229c9493e4c. 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/CH0011500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b29c1296be5a18f20b66054078c4610900adfc37c3278585930ccfe39c6a7a. 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/CH0011500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072f57605be0db6ee769bf0509cb0ee6cba8abb4a4df1c0fa9d6af9815b73376. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CH0011500111.