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 0xf025d66ece3acb37f2f90f1a74f77bbd6b921e5dc1d6b972f16103317a0eebf1. 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/5aa8c9cc-0432-4add-9bac-870de4af0cc7.json and https://artists.proofprofile.net/proofs/artist/5aa8c9cc-0432-4add-9bac-870de4af0cc7.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 0x43fabf1bd2c832d55174b11f26db46777f7957e1e26c5679a250a6d40d47f7ba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA81873484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aab8c61e354704df320be4ffdc82b1f8c4df30a1d66aa64177f41043852d371. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:25Z), 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/QZDA81873485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd971dcf42dc3521902d16b2b29ae666515f7e619910bb6e3f5a46b0093119b69. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZDA81873487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9a0f620eeef9d2ee555a2b2c169e8fef4f28e4143185a42f038c92de02523a. 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/QZFYW1959280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf941283de52dda349e8062eecbf338851e6d8a4ab647f5556bba1109b77cbd. 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/QZFYW1959283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f6193b34d5d2ae0e72230bac26148dc1434b63f9caff54f623185bd1b143c3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZDA52084798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a80ed68018fda20c8d5abfdf19f070e509c1937104f2a447453fa3e05cbf31. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:33:36Z), 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/QZMEN2037305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107e59ae01d1dbc024f1e77c50034024435ed64507edcef48cbd1730fee975b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:12Z), 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/QZPLR2054009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81bc784a2e2b70515102201b6cae7fbb6a9b19ff977eea3cd6dafa24a1114df. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:22:19Z), 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/QZDA72251563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774d8d09221be62add48ac96c83e15cf6ccc34b7578d7fdae43bdfb6fb19f9d0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6H2297231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c531f229ed0b7b5955174bce05abde44d14c481c36b2d96cd14a6ba8323f9a9. 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/QZFZ62392777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a516739e3a492d92e1e23fe235655f5f4a19859f65db76227cba63871b6044. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES82383351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7949079887aa9feb4efda5e3cadd2ecae88151addfd2e2c89b57db63732e91d. 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/QZES82383352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf354e153ef7ed3c513b18c879d2b5d4fc842df97e29d9d9d556ac0d91b6ead1c. 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/QZES82383353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d6a6a19a8f47dfb5ac925a19e1b1623bbb021aa1cf193415ef36916fd5addc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:31Z), 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/QZWFR2412325.