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 0x9f3ddf51e55f5c2d3fae66502f40da975495f882ac0302dd0be522396c5519d3. 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/3b0e2b29-546c-4a34-ae90-22a3abb56dcd.json and https://artists.proofprofile.net/proofs/artist/3b0e2b29-546c-4a34-ae90-22a3abb56dcd.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 0xe41a3ecaf69882c2840940de94b73d69cc569333f5f9eb60843e616c0590c749. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:02:23Z), 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/GBMEF1600905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18aa5bca3a3e6a9d997ec36f43f8fa7caf47be49a6818d7de3973b5c96164e9. 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/GBMEF1600908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844ed9f59b9387c03ae1adbf3a902d83d2e058c2daec9e8ba2ad9499d9feb2dc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBMEF1600909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa344bc08e71871fcad980b6cd82cd3a7774dad84b2c03954f15cc857b8fd2fb1. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GBMEF1600911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9853cf1126dbde798ff8dddfe15455499c55462f8f658d7646571824d3ff55. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:13:11Z), 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/USUM71924904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0c21f1d9f4ce935c42fb9289691ec1b0451c9944fdb80e4fb9dd7194ba13d1. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:40Z), 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/USUM71924923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59eae897a1f2d634071ef78b640a054c3b6e6fee85d8c830c7a2ad61c75461e. 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/USUM71924925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a055ea679f4fa7ce8bf5a077acf7b6862378804a9dd69df158fefc1298de58d. 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/USUM71924926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a1d1b574c79774c808cbeffc64abacaaff0520528b7ec2a17d189c12bedfb0. 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/USUM71924928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9569b136c4f509acb0148753c7b52a66b3b0c9598637f132e2f6e0e24372c1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USUM71924933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf240d064995f5e3609f52a48dc8f7a4e4ce008c4348d8e339a3a2b23ba6046c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM71924924.
A Day In The Life: Impressions Of Pepper
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebd703006a6f2317282fcff19084985c798c10c6424389da93e210924294264. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USUM71812550.
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