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 0xcdfda87239ba0debca42d1f16c8a1d44d61875a46a18ad6f2581b52f3639137f. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd417766-f2fa-4b9f-8a57-29d01c0f15a0.json and https://artists.proofprofile.net/proofs/artist/bd417766-f2fa-4b9f-8a57-29d01c0f15a0.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 0x1ce660cfb8d72553400b43b4fee592baed13d2ad89b9c7e5548246aa08cda6e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR1917395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09d3603351916ed034959e5f42b23567f2076a1d9f56721ba392626ab5bbc31. 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/GBWUL2100566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50147b337e508fda7202e820d39c22c5e40dc6807adc5c3f3e6ec6cd000e9783. 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/GBWUL2100554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062ab7e2a85f6ff96d1901543471597bf5e4fa05b665844ad936033b4236307b. 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/GBWUL2013062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc19792946b9ec149bb56f85d9971ce08015f4a6176c8eee5b1215d0ae49da26. 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/GBWUL2013084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a8577b792fa376c8151b3d2c790c3f9016a84fb2e026a0077dcfb430d83030. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBWUL2013089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493d5013eda460c1d94bc37cc6b51898120ecba9c33b4e9b83c6bd0a4746d152. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USLZJ1825316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db9626723bdb084783d50e55944dc4d978bb6ec4d1b73a4981670c2e0b59092. 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/QZMHK2325954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04b46d5b47f18eaf4a4aa76a46a8424983858a3ea1033add8d904ae5bf994c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2235989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613dc807cdd64d981ff2d0368a692be386cb95ef9c9c4541ae7ff068e2edf24e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2318741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1441465d89c04b9b67433497936b724ab07019cdaae39a5c687bf124b527bf6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2318742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf1f5637c04f6ffff0390c68e617552ec5d6e382f720ae2b2931dca9b59e0d0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2318749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4781e6e9e5b9ed57001f958e302e26a6b5d8e053d06d82bddefc8b321a3c3859. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2318754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8be2a858a6ec622f790f8202476cbb10412e751c608766a2985a0418318157. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2183092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5563f188f251712745e18498cc59ca70d2b59189cdd34a85b77b6a4f3c7397a1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2183094.