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 0xe998ed498737f7f0133515546ade5fd70796a40bb360d72d6ba0b2fc53397db9. 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/c6425c07-5c6d-4823-b541-a9c5a3e84bfd.json and https://artists.proofprofile.net/proofs/artist/c6425c07-5c6d-4823-b541-a9c5a3e84bfd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lo-Fi & Chillhop Instrumental Collection
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 0x0e057308e121dc947be423f36eebbfa0fcd389472d71ef21c6deb590954451fd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:44:33Z), 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/QZES52240900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2c50cd8540aaefe1697b1a6631ea05d75f515c107f0449724b43eefa700341. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN42268681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df44323d8d9234602b1775e108b2e691918682e6132edbe2186cbef8cf6901a. 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/QZHN42268682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a889bb06f161a91e52de83c7b308945e499d8003fb6eb7568db9991e2ca81de. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNWY2236798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ba11561c83e9bba2e74f4d5cb573a0709c5f6915213062cbe342e4b2c7561b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:28:05Z), 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/QZMEP2389228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2470fa95d0c60dac430d8c0d2a259fcbaf675ea702c7d9b8baca86950d2429a1. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:27:22Z), 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/QZWFE2369831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd33434b6f37a4ab523e44edabcdf70772fdbf5aebdbed4a9af59e1b6a4639e. 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/GX89G2457518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d962d953b3ddd2108ac44b32cd625f713b7fe9da3f70b21c9a9b5be0db2e9b. 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/QZDA42586137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44707125d4b549f42ff96ee26b7fba48ef30574d247ff118f223f5eb97d0ac7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDA42586141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2045b924d9e18954f2d6c6161e0ab64c6b2edff0f7b220274f9db3dd77768d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:31:36Z), 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/QT4K52512828.