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 0x35e5b0ee4782316fd4e8b048203f1808779c11c9852da2673134f6600fc5cd9c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e26d250-729f-4a4b-a911-d0b4ed00aa7c.json and https://artists.proofprofile.net/proofs/artist/2e26d250-729f-4a4b-a911-d0b4ed00aa7c.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 0xd29503684c8dc0ffd6290ede65faf9c3e74f406fe80de07ddaea9dac6dcf0845. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRR642301662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7036f030a74f729850d158c5c8f6a8e9c35c6e25b4dadd94fde2cdfbb6c7d7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642200708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d207482f600ee451c19c252f012db7bd37fdaca838915fea202391eedd2b7f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR642300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29503684c8dc0ffd6290ede65faf9c3e74f406fe80de07ddaea9dac6dcf0845. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR642301662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c41062d09065befaf91f9a44d3d4db1822d4567220eaac6a4efe3dba0e7cb6f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR642301996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4591cb6f42ca5eb6415c75b9284580990a3618e49591d951c568747016df031c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR642301997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea54b793808cdbc97663dbbd4a93975f9bca8ebac9d5d37189d409ac0c58a36c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRR642301998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364797f8f9b0d21266e4de40d29fb0b6c7075f8c845d0df83c1325d2574cc051. 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/FRR642301102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028c8269753488b0783fb976192605a5beaa22ec086701b6d28a18f6583b3df4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642301999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677427e055f04881f9d3e72d22ed8572f55f36a92a85aea709609e87d3475a9b. 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/FRR642101514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1132a533099a2a514f146b1cc43c5e9f5f32984801fa76b352bebcdeaca6613. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FRR642302000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88087cafb385eae33b61fae8bd8fb17a5997e6cb5589a61cb972a8d6982a3d82. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRPES1600490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8eddffaf6cf77a1a401be01dfd2564eb8a31103d0cb434f320dabd0f78730bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRR642000396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fad45ad7d5b2fae80efb0f1f5ff1fea7441aa431edf56376e403bc03a151b89. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W11405960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fad45ad7d5b2fae80efb0f1f5ff1fea7441aa431edf56376e403bc03a151b89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W11405960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88087cafb385eae33b61fae8bd8fb17a5997e6cb5589a61cb972a8d6982a3d82. 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/FRPES1600490.