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 0xaffaf411eaa5fa3125a1a2113ff650ec8dfb488795d899dc48c665b28202f265. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c36b5a39-f173-4087-b004-7ad5f703c0b7.json and https://artists.proofprofile.net/proofs/artist/c36b5a39-f173-4087-b004-7ad5f703c0b7.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 0x3373edbf9f39412a8041edcd4bf8a7f437933ea1370248e9122421f11a37906e. 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/US23A1541492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b009cddf60f458edb12405d40637f4e8f68b86ff11be49e758b6d9dd4fedd. 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/US23A1501162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b0298e483e8ff0ac31676911d33ad59479768eea54de27c8a25af9259ca56a. 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/NLSB72000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb7926f52d7550367075d9c5d23d2e82b13549e86dcdd1c75ffdad3516e5439. 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/ZAE121400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2cf8c9a0ad05c5e8bab767239dc726e59c5aacb0b63296b5c79135f4c5d1cf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAE121400353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a30420f1e9637a4b0175e379fa6241956e0a38b3dcdcae3078f86f990da3905. 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/ZAE121400354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95fcb077c69d208ac9dc21d54972a57e40bf493ee2439dad9cb4c380267567a. 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/ZAE121400356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd248c60225345ff0f226cfebc10f76dbd52f8e6e3b23560c22a0b297ad702bda. 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/ZAE121400359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2412c7355ac88773494f1a6951f1c619a5c9e8b8b88f73f416ae55e5e3230e4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ZAE121400360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf523ff931ecf4e96748ccfcdeebad2029cdeae4bc56cbb1f773a38910fabb017. 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/ZAE121400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdbe4db2ed07270544b495cc5814f78335d393c2387637129d230053f029c45. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAE121400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3373edbf9f39412a8041edcd4bf8a7f437933ea1370248e9122421f11a37906e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US23A1541492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8440e6088192217eaaf737a332d182abeaad2e2c0ef45b43a4068f889fc5199d. 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/US23A1535977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b0298e483e8ff0ac31676911d33ad59479768eea54de27c8a25af9259ca56a. 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/NLSB72000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9660b093e18ba63cbf1a164b1355ae234ac8cbf38cece4f22c26eee6ce8bf82. 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/ZAC581700859.