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 0x8ab069f558191300d69050a7c755b2c06a3fb0abb6d950e30fa9e31d5c222844. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9915f8a7-35f8-4acc-ac2d-4b12087f256a.json and https://artists.proofprofile.net/proofs/artist/9915f8a7-35f8-4acc-ac2d-4b12087f256a.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 0xf67ed2e7dd3f4513487828b75e6cac1779eefbd4cc16b815b441a4e22c21413d. 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/INA2W2200538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6189f3593d8b1b6ede4d431998d64d57cfd5f5b2e261f75879c3ad011240da6c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:06Z), 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/QZHN62290834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab11366f51ef4ab48e71f156af1102da5c3b3e612bf4b13dc59a20b5926342cf. 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/FRX762284505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd74673f0784b42b2e8f1474e85efb83433f5911e683fcbb8dc0e0772e96913b. 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/TCAGY2357483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ae7e07f4f4245171e8123e224048ccb927e463ec5bffc889749545396e16b4. 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/TCAHK2359772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007dd57ab83df599a92daaf1009a6ddf2fa91cc6150aa6f5bb23750fbdcdbab8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHK2359787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a201528b7a77125ec1dd1b86bbcd27872adcf1a82b16d0651eaae04ad04dab2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0R2320012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa566f22c718103d58a681ee6638fea1d2407edf7354c2ff4a07e604654d30a54. 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/DGA0R2320016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b70ae96bee26b4204aaf64abeb8d3f6b904aba3415c63040b62e7c3eceeaac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA0R2320017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb73ba0c9fdc940f9a15e0e24406de65d03fa8f2674b5d3ed2a2c32f34e9412a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCAIF2436711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61581ea805a08a395dcd1fd9255ca40dc9b06170aa0654fcf9796606e35813b3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:42:56Z), 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/DGA0R2442956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d2764524b736b6e00a36b71e3d02b23887b2574e50bdbf0f50bcc370c5f53a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/UKJ8H2500342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5c09bd5d43be59fe9445b3cc02d47c11df78d30fde85db54b3b624e949d85b. 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/INB942515057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd0b17002c1b99841fecbd14e81d6292e3b66dd156ec669b2e936af2b727334. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJY2505385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863ee4e18a5fbaad540c62f727d62fed1f79c2428b23d0a5959341b55e38139c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAJY2505401.