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 0xa86b64100d4b6859b7b9f8ecc1737c2c475b26531a268e7a8b8ae9bea58e215a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50fdf625-1d2e-4ab9-b2aa-7550a45793da.json and https://artists.proofprofile.net/proofs/artist/50fdf625-1d2e-4ab9-b2aa-7550a45793da.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 0x9d57428022aa0812622a3a4fa9632a7bd671b2797aea1fae00cd73c502822da6. 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/AUBEC2317126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bca6f2e059fe67431a09ff3fa76c9824db2d4cb85f23efe023103d23a57df0. 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/AUBEC2317129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be44de6cc761d857e027c65136553d40c56db541cf7ff166daeb8d833985623. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/AUBEC2302159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bc83fadab48ca49659512e0329de23768c1c082a72aebffb72c784073aef38. 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/FRX762027742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02025ed912bec740fc71a89a1e6a0b243396aba13ea0705bae9c849c9b3b0e7c. 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/FRX762081357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8cb8b70e0b584e17bd3318b20c34b524bbfad381dc38ae1e614f744370b7af. 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/FR10S1703598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163daa106f19b951799ad8494fd636236ca45c5d71bc26e4a87a5637643d82d9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR10S1703599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa06d9bb90cdc31a2ec733dae009907d59332aab6f17b643376f84cdf09cef0. 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/FR10S1703601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d84a7574473b8a24bb4b2b3d54943e3ba22d67af86c727f7ca0770918b3d35d. 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/FR10S1703602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6d9370e1e35ce8ebfc79c82753bdfd50d7c13031c037ff2404bc656a701dcf. 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/FR10S1703604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1dab3d9a9eab4b5f9092006c8d22e12b89e2d09771263005504112e59d146a. 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/FR10S1703607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44a8262f96c5e020f886547d74c9d27eaec29d527d6c33c71d161b090f4a0d3. 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/SGB502237860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a2dc9650c36a05c05c7199a1ea19b29cfda454470ecd3acb48ddb09b5b9bf3. 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/SGB502237871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be44de6cc761d857e027c65136553d40c56db541cf7ff166daeb8d833985623. 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/AUBEC2302159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfae90de1e1fd9bbb56f194fd88b3e96880f4dc376df0bc6133fea11f34fa308. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR2X41715358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078e48054b609aa577831c3ea8d2babafeec381f507dd3adf9e6a1fe81233790. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR96X1683543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f15b5ca97e4f70b98a8c047383905e0140f746e97e10de548301d410f25524. 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/SGB502237880.