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 0x944dd06aa11e2adb8bbacc32f7bca280b9071021b2e2b5d34488add2a511b931. 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/0fbd02ad-87e7-444d-9b7c-af3fcef5dad4.json and https://artists.proofprofile.net/proofs/artist/0fbd02ad-87e7-444d-9b7c-af3fcef5dad4.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 0x071a0faa63c3c15c0dbd48656d12b366ac0f9df3bc8ee5d09508eff3e9d93113. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TWCC32010364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d5e245b64c5f539b46e4dfb72a2f5d9dd7f184f353e45ca27c527960c565a3. 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/TWCC32121752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d40748b7c3b791f81357e5a2085c073a7ccce297c5d77c972f84c90ee973a33. 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/TWCC32121753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607c75660fbbaeac844869424dd6e97ecd2f93966de4f690b66aac4964cb44ad. 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/TWCC32121754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db0c64b046d491b18a2a76a06b9bc474dabf82ec902db23c58f66dade88f180. 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/TWCC32121755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fd034c8728b98c84b0bd9bfa602bc1c9a32bf9b44b962bb8cb271b4e5f0694. 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/TWCC32121786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430ff3ed18b5b8e7aff0c0db44769ed46f5b406830b2be605269ebb31c3bf3d0. 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/TWCC32121787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf785ed9e00d553308f9fef1b1a957bfd42088ff548695e5bacd55adf6959bd09. 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/TWCC32121788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e57ad7e4262164517208aa1dc15df866692a7061291f12d97e4ac0a5aac15. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX452256002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ead844b09c78194e8d8c10e72ad038b2660549ba09285bec975c619952ec38d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TWJU72300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638c9d64771055f41081a5cb15509aba4612873d685de9c5509604016d1379cd. 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/TWCC32000827.