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 0xd8ad7c5d333b8a71f458103c8e94bbf91c3dd90874399d6c988ad53b915fcb37. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fe6283e-add7-4b25-8750-8696a3e2a35c.json and https://artists.proofprofile.net/proofs/artist/5fe6283e-add7-4b25-8750-8696a3e2a35c.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 0x343bbfe39950938b62b09f731d24f7eebdc09c26299178b74adf08dbb83d7960. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:24:56Z), 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/QZHNB2583590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5c677d0a8de320064516140171260fd51fc20fc787fde48fd12b26bbd6f114. 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/QZK6Q2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5192d17c7b6b85ed5fd51f6cda11e5e73eb534c401bbce6d54927496bdc220d1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:35Z), 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/GXHAF2507891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612d7ef9fb0a3b1fcf79e5579e5c1bb39f313f96514e87dfcac7b435a4ba40d0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:27Z), 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/GXHAF2507892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a95ad60ae0b5f65e0acfc71c78d7b2986b9224150def2acc66a280c45ad0c01. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:51Z), 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/GXHAF2507893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb09a2c503df575bf961578e931fd23153ad50988489d84ee7b56dd1d4745e2. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:02:40Z), 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/GXHAF2507894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a744c31697aed4bb4c7e08124ed4e791936bd17b23a16aedce190ca9d72ac9. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:30:27Z), 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/GXHAF2507895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31428b4e59e71c668e1bc2b2cbc106148ae76bbf7a45b2955efa430acc18c71e. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:02:39Z), 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/GXHAF2507896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2dda8f04911e7f2294ace2db601a84baee0de71428a45e1fbdc571728a9551. 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/GXHAF2507897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e3f0372849202e7e0a7eecd3d78c0b57040fa7e582b3245cd11c5a2ebb655. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:40:57Z), 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/GXHAF2507898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59c234a0436831edfd957ba10d5c46e1e4ba236622a52819a921fc198761938. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GXHAF2507899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84886298ca7a436d073b2719d123f30fba0815d6925fc54fb4ff193884d4522. 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/GXHAF2507900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf2c87ee391faeeb9a410f33e963718dc8b76515d087f518868cb72d96064eb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GXHAF2578061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94220504a9e0aea7542805eddefcfef3c59dd8c32d91b98e60728547b737b44. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GXHAF2578065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0dbb41bd4b1f13e06d3bf36b15ed0cd018658cbe193fb64fbc5ec0602a7550. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GXHAF2578066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd364be38e2dba43bc6bdb2d723c54103923d6db1513a4016e795b6af9b9efd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GXHAF2578068.