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 0x269cbdfe6e52d96e295f9defc645929fca7e5dddc00289117e1a3ee2f1db5073. 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/712bf15d-11e5-469d-9142-44641659a842.json and https://artists.proofprofile.net/proofs/artist/712bf15d-11e5-469d-9142-44641659a842.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 0x59f40c7fcd35450e10744a404c269596c8c9731a47e8f872bfbd07c83009d672. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/DEPI82405405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2b55cfadf9f1c4808eb92a6d3f49dfbf044db70995ab54e2fee4a37a28669e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82405407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8117b01399c3289c765244eb48fa7b05715e5b9c1a3e00eead5bcaf7822e3d1b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82409600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb358135e0b269598101ff3b46103a5e0bb54291983fca7ac0011b381568be66b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82409603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35f04defe51cb8af5916c79c504da46b9985f8022a82d96087e5ac6fc3aa75. 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/DEPI82414173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1996ef055b5dff07e305c264734a78f3241240c7e4528c33457b3550434364. 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/DEPI82414621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3111cf3086e2b23333d6341a61e15be6500df2b4885d3dbc35f09e4e723690. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82414623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec30f4fcd365af0ea2713325b5aad21a5343a30eb07feb2ac4d4dcb3e36e26a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEPI82414624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41ef26874a32177dcf9166fcd216a08b7dbb134ea367d167699f86a18840c3c. 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/DEPI82414625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89318dc3483853ac249f92a723e647d7d39bd5f4dcc4753c38b2e652dffa1271. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPI82414626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318ae08d1f58bf05cd414e6e1d133cda494c14e2b03213ba16f2aaca4f0f15a3. 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/DEPI82414627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94e037cf9648dc16b1f43cf646e71ddcc7e6b536a477420a1ecdeaab11227b4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/DEPI82415008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18afc5ac5841d99766f751f077fd9c64f982ea2927536e18e5100ffe6d3ddc33. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82415009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e91804b1405272386e2bf35330a0c919551b19d41bf6470d154f5f355ea64b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEPI82415010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83342a80496c828069ce715f73b52954836b675381d7981eb2a21714b8ba14a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEPI82415011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b195c6db42604a8226960c1213b2e7f4efa16ae3b9918cad9d4da312075abe. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/DEPI82415006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6084f4b1576c7f5d01f781a8d420f1162b8af3311837115a8b54264c4936a8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82415007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33464c185f8cb0d28fda7b98bf6e65b06c6e373b978e7f93f419203cd8b54646. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEPI82415004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb13a49d31e15bf54b807ed96ff10331ca639f219c52d5e4f405bd91c138a99. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEPI82415012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83881c9a5f5781af5e4e32477f0e526ebcb301e65aaae1b350076e4e40675ba7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEPI82415013.