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 0x65579accd061090ebe0e79cc7523a8544995964d346d450515bdec8b76f1bb40. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea73ef9c-4b59-425f-9c29-cb33d856cedd.json and https://artists.proofprofile.net/proofs/artist/ea73ef9c-4b59-425f-9c29-cb33d856cedd.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 0x66300f8fa68016a42cd7e4e5dc74af3d4db82a849cea132879024e4111defbef. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:49Z), 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/QZWFK2466469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf069b09544b1e2b4540468fb1d3229f54f245d0674ae74f5f5dfdd2368117dde. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFK2466471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc957495541ab13269bca5bd07557c4ed2031669778571666d81146f5e2b3116a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:43Z), 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/QZWFK2466472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd5d4e08ba900b948c6b47d7461b5bbab6de322ba16b43cc6a9b9150810824c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFK2466473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f931196fcd09d32a4a94c40389c2dfa7b3ba36db5dca71df6885b7c95da77d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6P2599409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddea796dc76d7440025cee8b5e49ce89c339b3fbfba7e26b18e3eeea5d4aa43. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6N2547654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80117cab57ee38ea3f6bd8dc5af84c5627daf736055186a484b3ab7910ddbe81. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6P2599411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058c834a6cdf84a3a6ad072eba5d64c5b89a9e493ad87d6147d1b762fe79fe72. 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/QZMER2500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51dc106ef701be2577ee56886c97481c3a5945772741379b4d3075431e65077. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZTBC2542842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ded1204fc45713986dee4c0cda20438a7707b7e2d44a9d7836e1a06ea221b7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7Q2578846.