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 0x1cdffe90421623d56bc055240c1ed3d31267624e6446d97ea4047f62944b3020. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74fce64c-de5d-4f49-8220-8c85b9882eda.json and https://artists.proofprofile.net/proofs/artist/74fce64c-de5d-4f49-8220-8c85b9882eda.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 0x2898e1c29825f7401f0b096e0cd384c092833e2c17366d6ebd5672a3c1182095. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZTB32430688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8c79d83485d41a512cd0d012b9df52178ea4d8c5f024cfd5ffe9f2ebfb4475. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTB32430687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f0c6a0c3d9d6295cf4fbe361265ab298f6a9c72a5f36cd536d751cd3bb8bf9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB42483689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d83b6376708ce11b1e99269cf91302ae0b78bbb2279dcc841ac66f3574691b2. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTB72440720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef382f11f22a7548833dc0fe7966550882a3e2746416bb998fc315b1a1d318e1. 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/QZWFF2401074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a01ef1a6f73f3df87f954a52c1e4d44cebf15d13fa6ba50d31d3b0c23c14f35. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6Q2548116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0adc9e6afe1b5615acded9d81fec1dd0c3bc8f2108ee133d0e8f0622f87ddb4. 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/QZNWS2508568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa99d697d27dd346dfbcb6e515dc2d57d8e763559b64288dd0f0de7199c2c23. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:23:25Z), 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/QZTAW2569753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d552f101760b10c5edd103a11f2b6750f59ff70e97112a1be81a0634cd8fa4d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7S2594460.