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 0x1dcfc26ae022bd7df10b34326861a346fbff18f98f762351bcbb2f81eddfbb7d. 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/3703f651-964a-468b-8b33-0a176945d095.json and https://artists.proofprofile.net/proofs/artist/3703f651-964a-468b-8b33-0a176945d095.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 0x5b5be5a5fcd07bc6fd046a9d44b847b28869fc70d7d8ec741267d96282c9f854. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR0010343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a96abf20242a98281650f8278cc4302551141f5d67cded11fc4d15ff50c5e9. 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/QZTGW2100495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c977a09ec9da917aa739c5bb5648b0744b49c7d11cda8e726937f7d66a0d893. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTGW2100545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d32b991c99cb564a845e5efa71e9d6e9096ebe03cc05f2c0b1f1467dda3c684. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTGW2100546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6167aaab07bde15efa748b045c4c3c806ac256bc0efa31129ad6412fea879c5c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR2228880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10f0971319f65d8a402690acadfee9a65dde438f884d807801b21730d76609c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:26:59Z), 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/CA5KR2228882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a646316684fd57dcfcdca93f044b2f4cc840e86665c7ab3863db49ae2ce569. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR2228887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aba25256ba9f93102dad81772101f3a0cad64a1c7a9699c12229e48622ee55f. 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/CA5KR2270813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8522e9faeb30322ff358c3c688c3035e07c73ec0b335b6d440a1ff384db42cbe. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:34Z), 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/CA5KR2274189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dee67567b2b923d352612f994cb5fbce3e062fa5e456cedb628cbaa9d738f8d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2272216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcf0d572daba37ff8a5b3623a7565a8f152c13bb1de68eaa2a00983bf2b5fd0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CA5KR2274191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b45801212a1f29e55f6abba54fef9aebe67e8aff1085df2769f4bb711951ed. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2274196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aba25256ba9f93102dad81772101f3a0cad64a1c7a9699c12229e48622ee55f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2270813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2814b74394daaafb5c8452d47f9f2f0ca1a1ebf00d13b04537581112a45df9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNMU2399981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21417cc1a921a958963d70a68d242db7c3e63fd21d0e63d767a90428fbc82d0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USXQS2436368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c487f4305a190d0b84b80a876ceaf94c5aadbcd980c50565a2cf0b2226efe0a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USXQS2436369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0671f0bced058e638909fbd6fc995b8bffe6180889697edda8c84c981c66d08. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USXQS2436370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fc2247c96c6f65196b38cb709c57238d5b61308987a5b10e4f70f746dcc8ab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:20:46Z), 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/USXQS2436375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642d5404581cf4f6ed002a90ff35f61d666fd1015554f5d49cb9e42cf2bc496b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USXQS2436377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e40b0f21e59072bc92b12cc844933ac990748818be3f6f0413b73a13bff642. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USXQS2440829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714fa9cadc2633653f78e729cc4ed0f954e8fde93a7865da1d8c57d906cb5a09. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:02Z), 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/USXQS2543448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e884fddd555ef4097dc092a5270d3b825803fe07ff9216a0983ba06f72e9776. 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/CA5KR2392739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e884fddd555ef4097dc092a5270d3b825803fe07ff9216a0983ba06f72e9776. 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/CA5KR2392739.