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 0xec154d836667e67570adab1ba6589bbb70583ff019745a78877f824cccadefae. 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/90d08e83-9efc-4ac3-ac7a-a1d07f6822b0.json and https://artists.proofprofile.net/proofs/artist/90d08e83-9efc-4ac3-ac7a-a1d07f6822b0.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 0x8ade6f6fd2038f1f539c6c176e918aaf23b60d8740b9411a2b7abeb6e8a36065. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH1892193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ec35a15f44c91ae4c8174bc1d2fc68e08c8202cddb0ed486d5596afdd5f866. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:53Z), 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/USCGH1892194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203db1ea979dccb29ab71ffd3ad17e4a3ff2d0e849ea94ce944c9d88000327da. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM91857856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e962a6a79a9d224203239fa20ad0243a77eac14352b2af7a6eda8eabeef797. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM91857857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80eda0e47687610831315914f378befc3085bda41b5669a2f43fde1c69e8ef5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKW3Z2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd99943582899c309839aa855b758632ad30354183e25bc155b5a5a79caf71c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/UKW3Z2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dc6d4dc37c0976a717e6f067f0fe418ee6dc7bfd771601d2b7b648aee2b095. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKW3Z2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8c9b8e02f14200f7ab14c4a6637b5e08f1769e91c2b517df48c8eca1751049. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:57:45Z), 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/GBWMY2051080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c61ac3d062a56ee13560e136fb4f7c9e4304411f97fc9e3878c7daf032ff9f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:28Z), 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/GBWMY2151360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f8305ecc21f1bc726e29625789fc96a66dc2046897d24997a7b7a21d52b61f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5ZV2201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c94d32cfa20835f2458c5a0fdcdc81e137bf0c9e677b095a67afc79cd82e19d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5ZV2264501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd92746df0338244bee4ae15980009afe1ee36a21ee1f8a957b6de440fcaca5e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5ZV2312802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80affc53fd8eb398c37eb156adbc697a124c4782731ae4331fa2924edfc6c98f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:16Z), 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/FRIDO2312763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da250433edcaa8050399822bc69ba9e36904dee705507d5b90e72bc0bc268b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2204513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43da250433edcaa8050399822bc69ba9e36904dee705507d5b90e72bc0bc268b. 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/GBKQU2204513.