1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x0cb3d4ba1ddb28fafe3341200d9ca29208319a82c7322806fb1ad952fcde3bcc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dd7b08a-b7b3-446c-b96f-6e0b9299931a.json and https://artists.proofprofile.net/proofs/artist/4dd7b08a-b7b3-446c-b96f-6e0b9299931a.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 → block OTSBitcoinBlock must exist at that height 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 0xc3b73899c21de994ef4149930a4fcd6b86db13c6d6c2f8baa41990423a5b6a3f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3EY2579247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253168fb85ef059025f123a5c473dc03ba4abaa56cd75138a3e22be181fe0bc1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3EY2577378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd766e7285da25beacab60aa0494d2774331611d93e2496057d7cd7d3b16eaba. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QT3EY2579246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7c3fd40ff70c6c2c5a1ed5a075546527701566ed22fe9b1b52f5540fa3aa85. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EY2579269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b28e93c0d142a00cb7630bb2d3ab173be884dfb7f5793a07b9f16c3b5d9a30. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F22574097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7b94be64464505b7184725d46b0b8edf2f62a6477d4aa68cebea8c975650e4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3F22574295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f90ffdbfe2e1b9fab4e551965982046ffa7b6169089fc98222e1d01d6cc2d. 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/QT3F22550359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3805cc28e62eb3c7e55691a08dab491fe27b61406c50b9436ec33f58523349ba. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3F22574352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83b1e298b0593c882e9927c2cafa7d67bbbdd72c695ffd247f8f8a2cb5f510d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F22577892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eac741d8366fa16e4f4f803fe372dd1c8344218144d26d8655689e08ad722cb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F22547817.