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 0x40f06e5307619bc63d82222d7b3a0a68536ac9743ba6c59a187e1eeb8b6c0148. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/428554f4-a4d4-496a-b63f-d0a6aa5375b5.json and https://artists.proofprofile.net/proofs/artist/428554f4-a4d4-496a-b63f-d0a6aa5375b5.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 0x6d0b0ee11efa73e13bd65b1ce31937e616bb60d86dae90e09638e86a505478cc. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/TCAJY2525449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b78928ad2549ca45a96e0e609dc0868416a547847286fece1bf41ec46186b33. 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/TCAJY2561716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6699666272199066b8c29a9bb23142d6bc6f1e197a794b4280eb72016d01b7a7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJY2561828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9315a60427174f808fea8b8f39285f22af5073e96beb4aea2dd589cf758009. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJY2561787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980525bf315b9f5de3fa4df5d42a2a6c325226c5044429194bed59c59fcdd5bf. 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/TCAJY2561803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2a19596b368a822e3f9952882f640a9918358a66ae2c88cf35f12be9dc6168. 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/TCAJY2561756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf782b47a6f5f415d3ada8a354e9ffe8ba5404a49e6d25b481191ff0e4f7f5f4. 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/TCAJY2580865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9422e8134fe52d32d69b32e8d2d7b42bf3c2f8ee18555c8aeffc3f15d4170d. 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/TCAJY2580836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9c39ded89a003b555f1222b8f8ec8f87c684a25b37ed0d3931313029a1797a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAJY2580635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ae73a270a7154a697894dbceddcdedac4a9957b63faa3f30c9ed6a8ad8e6e0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:49:52Z), 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/TCAJY2580935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32377a9e89eb30ee6afc6cb09602ace78d7036790dc5a161a9a1d646cbb56e0e. 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/TCAJY2580433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1fb6523f567a5e9e6762856e80a9ad7de33e761be68e5f4cf73e4d2b19a244. 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/TCAJZ2580818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdca0c2a26b34a3520f4e231e67e90d43bc2ab4ac818060acfc7c5df79dbfbf4. 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/TCAJY2580597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418a129290dded62668d037bddd81454cac5e3c84b0a97d96d3e0155968eda6d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:53:22Z), 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/TCAJY2580372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc982d4fd55cba5b2f9c6e2539e15ce35051e3e4301805b329e31e6d3150e83d3. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:27:51Z), 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/TCAJY2580748.