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 0x7f29745a49257708ade977d3b8b7c595951c974e7eb92296bc04ffabfd1bf21d. 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/e7fb7e8c-eaed-412d-94fc-76aa155f8bc1.json and https://artists.proofprofile.net/proofs/artist/e7fb7e8c-eaed-412d-94fc-76aa155f8bc1.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 0xf24fa3d60244ed8331ee50fde36b62a691739d64ed9cc18c77a0641f2b678678. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNWR2051088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f981419d88c4090bbecd37fa779770dee5d34c9bef3cb271bf26a117bf3b73b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA062294218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dedfb02128ab81abfd186301671fbc41b207a311727ce93771c6a730599a2e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DGA0H2309704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634649b5da0da6099c0ac23e4b18539f3fd64082603ff9621f28645936405342. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DGA0H2309706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321fda9d01ed0a09a395af63aa403061a5b5d7a2ad547a614c395405256d0d12. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX452229786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eed6c0e382c4e3c1769c1263061be1c81c35907e5e9744e471be16548ae6e2b. 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/DGA0H2309707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e83f6bd654aa4592461f8a80163fc5f78de35a0e25020eaa4bfe11f41e313e7. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:57:09Z), 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/DGA0H2309708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5569ce413044aac663d3b30837f814e59cd78fa8b635a8eef28be2c9bffef77e. 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/DGA0H2309709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456057e7af6273437d9db91104b16ed4e4e796469e84390784bb20db47002b7c. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/DGA0H2309710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2d7f833f32030765c339c817b60dda5c2ee2c7dd2bd1e37fdd43279bce33be. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA052550018.