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 0x60e21b68ae3bbf27e38d08f7a32890ed0db01977bda545c6575af3ceafd2bb89. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22d91e60-e9ea-41dd-be5e-2de5cae0e116.json and https://artists.proofprofile.net/proofs/artist/22d91e60-e9ea-41dd-be5e-2de5cae0e116.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 0x577def76687108b7af94fa5a0dabece0d02c8633b3daecfa1acf2fbe8572955a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWW2086822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc84047b66940a887379ea0c1417751e213e589b75f32766fe06ab226b0f386d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZWFQ2334804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08e1357e3359b387ec12681a6875b0cfd4d7d94e6a34d9308b072fe2249e482. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:43:41Z), 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/QZDA42445917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406e8efb8e4e748c3deecda46fc09ce8f08a36ce5aa5bd0c3a199832462f2230. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWT2344614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb671d8c40a08fedc7afbb9c1f4d4d8988b4e9763d54abb7a364581856439ad1f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZRP42330984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e4bc35f2c9dd6ef0148d976de8b368fc788279f6fcbc23c29b12db42c86fd9. 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/QZHNC2443508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe6d3769f56736ce403b5d7c2e8ea4924044e9f9dfb3fb9f3218ac70da1f2e3. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZTB52363740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cb7cf7b8b1fad4e29920ea1e291b3bbfb696cf7505829215739cb7372ffec6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFU2424946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4d2c9e850bfca3608eb45d37f8e6259436cd86ad179f4b7d1ae0d2c2c292e0. 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/QZTBE2379563.