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 0xe77084d584980754853396d6567cff4f90c66f9e0fc9de6e374fba4285e16d32. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/264034c2-72bb-4879-a0e2-297a7d3af485.json and https://artists.proofprofile.net/proofs/artist/264034c2-72bb-4879-a0e2-297a7d3af485.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 0x51783dca2ed0eb56d4fc2f5bbf1407f87a461c0a7ad41eb1bea570a5d418922a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USEAX1502437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd1c6cf502253a813f86245a11024fe5c4dca14816810bbbb18fba388610770. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USEAX1502438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35a46a7e426a2ed2d93d9ad98252527ac94f43830cd413219a328d432f6e73. 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/USEAX1502439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30d81df1ce084cde7d7c25abdbae9a763733e0b89fcf3051490718b4c680d89. 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/USEAX1502440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cc41d0f3d635e180768d4e291eba57fe1494af4ee07d64c3369b26ac990abc. 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/USEAX1502441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e10f2d5853c5647fadf68a72b4d2e4ef5eb3171a6e51699688c651d8e720736. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USEAX1502443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964ce04017cc4f236837bb509e8341db10c977b6e9119922dd1b83bf9a557844. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USEAX1502444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f55aa785abcc8f8782d542f20a85f538c5bd86fa38838a3cfe148981ae14087. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USEAX1502442.
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 0xdba5863cd6e4cbf23a1b5bacf5fbdc2bcd289bb8a58acfa71062ee37eb09e889. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMHN2098312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031d0799febe9629095b1b4f8bf308e0c95cf0090bafc427be7fbbe1fc117036. 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/QZMHN2065568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8312334a7553c2ab38f9fcd3a25e5b5c70c5f0ac3f2056bfffc5f1f3c4178f73. 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/QZMHL2022053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586f6061c8776720212a49feb446c34095c91044b6cfb7ddc0bb426051b94650. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMHP2074435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f10e4fa1645aa3281f1367b7697074175343be970b4e9103561281a6cf03ed. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZMHL2074841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b20c4a4a0c6c0418c44e302c23867b3e62e1f503b4dea1a17bd9cdaf6d8c74. 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/QZMHP2051772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32d96060d8aea1613c6a29caebbe01b327eef6b090cbf26c3f00443bf640699. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZMHL2031573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65112b8e35e47e8b4bb00c82a48bdf6371abad432d87e36e1e020b42d826b219. 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/USEAX1703575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e73e145c428d9522eb4bfac7e6aad0df23046aa6565c167230ee59545fea925. 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/USEAX1703576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dbf5411d838784c35ca32de8b9ae75405b76f440e1173774cb18cb5a012f65. 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/USEAX1301132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb0c63a1d2756da0f3f49960710450e9a29634d6935a8b6f855d52ce6ef7b06. 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/USEAX1301133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366ea3d0325354ac5e48d5ffdbff9e87e80522248a808f380136a96874bd795e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USEAX1301134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ae1c792149450405a5c652a15e5ee3196d3535a99ced917bc28866ecd8e6c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USEAX1301135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c89b2fa13ed839c919acacc54614a8ceaa43dbac992a74b56079c120959890. 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/USEAX1301136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6516aab3133fc73564b59c2f1ba55bb944c0f71ac4caf6e6bf8b9ec1c714be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USEAX1301137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f4818a5c6735453dff5885c6b9acdedab02d16c8bc1ad17e49fceffac9d84. 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/USEAX1301139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efda88b380c38a17c7d604124037c467b2f3387d97d6a435adfb66d8c859df5. 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/USEAX1603079.