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 0xa7919fa40cd09d699fc2588f1bccfa3c3fb98bf86c84ac69817159b3623e84ed. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdfcf769-ba4b-4af6-9d33-12e3681301d1.json and https://artists.proofprofile.net/proofs/artist/bdfcf769-ba4b-4af6-9d33-12e3681301d1.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 0x41c9780e575aadd3c7bc2b4494c4c8f6d66b19cbe04ca6d309cf21053b351189. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:05:14Z), 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/GX8MV2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338cda1b8fbe3fb9851cab5e0edf59af3cd06e631979f17a30ba44a11cc3d4e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX8MV2500376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe605c439ee5bf190a41ccb84bf81f2e2af9a23bb795e14514b25d8d575801a5b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX8MV2500988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d0ee7f4dea4b0b78c6648cbfa735f3f371ab629494fdd4607d1a0175c8577e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX8MV2500986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db306b47512011348923b9c8bc466917cd3a1f69b1721ee8884518e00e2186. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX8MV2501563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018abc090778ba86ceea15e9d2aaf1191050e5315e5c99717ae84e55752436cb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX8MV2501829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b66deef267c57aafa1ed374a1bec208540a9c82817c72b0c05017d5e7ca83a. 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/DE1ET2383688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094862460dc2ddb6690ea73f096bece413e852b227247f6f88c9d7be021fa59. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX8MV2502525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f32c0883e45fcb1decb7f2c8f9ad9717737a38015ad5951f871f093413842b1. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GX8MV2503404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaea388694123755bc285a0f61fbc4700c6a60c099cd5aa8b7a26bfc4f66194. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX8MV2503400.