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 0x14232a6629a4ccd22c1b6f8b167d3ff6a7eb7e2feaa1fd9112f36006b59962dc. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52663bfd-1f15-4949-9315-ce3286e4fd41.json and https://artists.proofprofile.net/proofs/artist/52663bfd-1f15-4949-9315-ce3286e4fd41.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 0x0babd41da7d64c7e40ee8ba09a5961228eecba28b2618f53436b8a1fb911c447. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:48Z), 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/USA2P1543925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa906d2ac69fb5c44a247b0ae4b1b4a419adfeb72b028ec95c07fcb0c355ed1f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBWUL2355495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad219ecbdc8e4546a521514e49b54178ec7b478388089e85e593bd9e3685a1a. 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/USHM82546370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ea9b8afbfe8a3277f4bf50150d4830ec5e755ca2456701cb7ff5f670760b9b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USHM82546371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec775f2a2ffad376d99aac775b5aea6b2a605c4e95cd28b8d61f60a028cb8b0. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USHM82546372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf022a24c4efc9296b088b9b54ebc67aa6c00443ed57bd3135ee0d0a952f89211. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:28Z), 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/USHM82546373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e00d38665dd8b2b2409f3d402b00f72b25e729448fb50eabcdbdd9df2372499. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:01:04Z), 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/USHM82546374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5022c99cfc868d5bf9b9cf7fde4622f4837e4108d523bb3ea9d1c1aaa83679. 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/USHM82546375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4733c570cc63c3b321e75ac3a4ea534300509074fc044fd8531fdd76d25c4ae8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USHM82546377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca962caf160701a1e7b30a773428931d01dbe734a52a5484adda86f6734e0ce6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:06:58Z), 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/USHM82546378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207f372adc20c419cc1e930ca0431c3ca9ad8c1e810a361cefc77e1ecf9d70af. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:24:17Z), 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/USHM82546379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb638652f0fd9892207de2e9847c490d16ceef0430b0c9b306f3643148fcab1f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:40Z), 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/USHM82546380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ac969e1086bafc2eb1cc42f1d132dc69e75780dd07eecc01825c17153ec616. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:56:47Z), 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/USHM82546381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832557d491ddb32dff1255a03a2d6e34ef46cd98ca22bfe7d51ec5b46ad4f9eb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMP7Q1300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1745247867272bac689b940be27750c4839e8348ccd26fe930c996d1122f34f8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USQY51763458.
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 0xf00af12619a951f5ca0bfd1fd515af3fbc815bfd63a4a983f1d200223211a184. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA5KR2084494.