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 0xfa08f004be430b09933cbbd90badcf576ed87355345c822c2b852f7761eac970. 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/ede5f656-d9a0-4eef-9652-f1e0a2ca25fb.json and https://artists.proofprofile.net/proofs/artist/ede5f656-d9a0-4eef-9652-f1e0a2ca25fb.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 0xd6cbaad5203e956a4f4ebf7df05281c633d5eae090999b2a669406db9def3122. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:06:55Z), 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/DEPI82405957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865c7982b7f01d5334e0286d5d44e646f22d172e637cd526d6f225b3931674a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPI82405928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad34115451c77e1363a156e7e563c96fcca3086ebf90127c5ef7f44ca3e1dc34. 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/DEPI82453742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4deec86f0b6c828311578f8bd2662a0f195fbe4d0608a9efd3fcc89f1f6d8c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPI82500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6f0ec70add93bfe0a8b5ba4c81aea55e1a7bfcf0c38abb8655e943364b8709. 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/DEPI82500605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a3aedfccf55c2b1ffee96696e39f7e462c865714a1a2720769a4e4b0c7109d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:39:50Z), 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/DEPI82500604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87a91fb2db7df9dd8960b45efa3a9e72d076541194e7d48f34110f31871becd. 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/DEPI82500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee72828c976db5d8c6c49ae27a9a00b1450934effb745a955e9f9f81b11ec73a. 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/DEPI82500602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbead4783055c189d2f2e2a527144bed822fe7bb5a0e5b237d53563bf98f1718a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:26Z), 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/DEPI82500600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1acb2982557aaa09e04e5ab155f285491021a3ee5ed446ec6f45fa6c7ef2c2. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DEPI82500599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e82db8bfcacc034d5d1da90e66eba2c6f8da626ed9a474761327c9c3716dc8. 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/DEPI82500598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b53d18907ca391e3775cf916ca54b1e82c7427ba07619566633d4ce3a9ff968. 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/DEPI82500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f4806b8198e6efbcf3ed2b86e0e1fb6d88ef603ebeaf98532ff8ebaafecd11. 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/DEPI82418761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836b6f50c1ddff1a4704eb57cdac18995c7c39402adbf010532f3383a898c4cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB22426684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb32fe197408d140f3e808508e8ab1814d4b232fa8ec62fadbf4d69122467b4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA82438628.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cfe5d9853b8ae76b5e0cdecf4ead42ea30c1d59c75d76046250cbe3e0e8232. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZMHK2235847.