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 0x43732b236f49d0f3ea1a76c935461602b02fc48d1ece997f6f44106f96ae0b09. 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/56f2455d-5ddf-4730-ba37-f2d101c4c097.json and https://artists.proofprofile.net/proofs/artist/56f2455d-5ddf-4730-ba37-f2d101c4c097.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 0x06a249b0304f1fcccc1f4957547aa03421490094a159bcd5c81d213b2c279286. 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/UKL3D2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de8a26703e57fa522ebc2b3455ffd0287db6a6318826718dd6398c7532f0753. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKL3D2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde5dbb18a45586d6ab70ef9c47afe4d8af69e789225fc8fabe8cbf257ae2d4. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/UKL3D2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e0712f12ac1d44869ef8cd73e8a4b9a4955da9b68f2e127e87b2da85e965af. 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/UKL3D2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221aec843a86303dde5f673bcd49384ebe75eb4ac15a989816f4ad9a77c3e998. 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/UKL3D2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de8a26703e57fa522ebc2b3455ffd0287db6a6318826718dd6398c7532f0753. 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/UKL3D2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda91d524aeb858590f7489c488a9bee5a983c555758a7a433773125de2d5a5b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/UKL3D2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2be0cf4ae5e581a34aa6d5923f600ae9ac3ac4bb0aafd02c7a3fd932aaaef82. 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/UKL3D2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc7265f1fef7b0cacb3529c8f59a41d55aa7a1bef090557a2e2171fed95794. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:08:40Z), 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/UKL3D2400018.