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 0xc179849420024796078406170c8866bcacbc25ed483ce2a3199c050593669abd. 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/63df369e-f656-40b9-bf1f-3a20926ce07e.json and https://artists.proofprofile.net/proofs/artist/63df369e-f656-40b9-bf1f-3a20926ce07e.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 0xa12cde50f8549ca3b861761d104a4ce03aab5c1dac2a19560c215e50039d5dd9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR3271300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac51bbdfb6ee920a78006c91d47a61be17146993ef57eed4deb7cac6cdf64a9e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TR3271300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91df51b7bef7a632851bd9d1e38217e49fcaf709524e2df6ec8f58765b5fef57. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR3271300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5798511f531d0f957bad5733c7dc96ec758cb0a7b29e0f589e4a8eae1e188dbd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TR3271400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1261b3f2f0c4b07bba912ef931907aad8d97ff2c7bc5935349341f6af704bf39. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TR3271400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f83e0659ff4edc99b1d9c57eb5f59d473883b37382636f5e0854bd8a408f963. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TRARJ1600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4da2cd01eb094ba07d4988f0a963663d9961a81b903502e4948572e32ad94c6. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:13:50Z), 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/TRACB1900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa226ede6778bddb8ee1362d837e5ddc70c19b224ea146d02c7eb967e0f2123d0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX762307395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2140c759dcf06788da9736203010d6671ce15f11522b0893ac0b60e1ffdf32. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:03:36Z), 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/FR2X42306811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341414af6a000185062d4bc30b3b38f38fa591f65fa8aee756ff4dbeeb000463. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X42306812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7741a7e01c785ed62e60a5e0e938778c088254bcbb2b2f3be5b20e1f1efe2559. 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/QZGLM2454750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ed11c4f483f711e4ce10a01091295639dc6c5cc2dc990e741763a468c15d05. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX762483964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6380876852f6d7be94c2cad55d38c2bc3776350cb0a1f569d81a58d7eed48d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:06:52Z), 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/FR2X42563997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf03ccaf202b14ee7cd159848fd5b4b8b21247e3f775f700bfabcde29f79ea3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:53:46Z), 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/FRX282565401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64371967160bb3b02aedf90799e5c8de8c831efcfe01d4bc0f3c2936e974c543. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DGA052567365.