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 0xf4551edec8c3690f3b8049fabf3a02926c87d6b73d78b1006074b1139dc5ef8b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3955fb5-affb-4953-a93d-bc3cb14d5b34.json and https://artists.proofprofile.net/proofs/artist/e3955fb5-affb-4953-a93d-bc3cb14d5b34.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 0x8a125ff0e748ecc15ae242276528879bcc3317176aaf27f0499621260f646bc7. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZDA62195534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8070009a47edd814c3b14d3ea0154fd3f23dde2bec44fe090e797f45f4497819. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA72175947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e56c92a38d1dcfce773eb89148b727fa632556e8daf4afdd67825ba05eed54. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZDA72192358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5935271f536a75814b285954494b6620ab10c9d228705e8b8e695aee06de5556. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:04:29Z), 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/QZDA82112165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fae7d957a53f1fe9aa1540a3ed418794f9df7722ac2b3948a7a10c2c0f1db4. 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/QZDA82141982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2af0764001d729aa9b8aa8bbeed7473ad64d6b3cce36a80bc042678e0710b98. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:41:06Z), 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/QZDA82178204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad3e90a3b11d271700aa338d818fcfd9bb7a113894bc7964fb92d155137d6be. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZES52111009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e520f20a0fa71f34cccb8487d5b77bc270af12fd8a4def14bf7484fcbea08c. 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/QZES52111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a477af189e4cfbadf8376fcfa56d165aecec16b9afb8220cd59ea6b292af58. 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/QZES52111011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf04086a03ace6d28f8d219e7a89c9030d1635afdbf65d1021178ac1140da4b5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:23Z), 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/QZES52111012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45741d47daae0f5319f7ed3475756c97a93720b5481c602be5305846db877b3. 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/QZES52111013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd68580ff949cbf7ff9dca12954994d8cce2b95616ace895060c8923a4ee14da. 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/QZES72117996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f1bdcf850b0a9f694257464872e17b9765f4fd5a55b997726aaba55acc56e1. 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/QZES72151880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7753d6533f9bebebd4ba280d71cc0a828d0b6fe51440011a15080c189718e4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:51Z), 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/QZES72169584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e2656127a9e5d97eba6a4979fa3584b5566c0f4848bb571aad40e30233aa57. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6K2134756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb213370fe7826f36140f874a27f9b81d6563dc9dfa06dbbb82ec380964fe2687. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:09:14Z), 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/QZK6K2134759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788da48ac4292390a4649580845dea9f234a7df60868dd46251e93d69a16789f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZK6K2134761.