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 0x6882d8c3b6d006c36ef315b334566352ee7c0c8cd5a5409541a60795749f08b7. 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/57c421c7-7b2b-4965-b5b3-d00de99a02ec.json and https://artists.proofprofile.net/proofs/artist/57c421c7-7b2b-4965-b5b3-d00de99a02ec.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 0x23e5bf99a6ddf616d3866bc541d8addcb8d99447f59bde560fe787620c014756. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:59:24Z), 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/DEAF71103904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0995c99bd0793949156fe5fb30d233440840da528dbd9d571ee46f4331c86822. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEAF71103906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80bda84ce2f47b4b128a0da984c2d11087c3fdeef1542ad50aee05fa6792ec. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEAF71336023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f36030b79d689030dd15da0d97d39b91828dbb6c0e3f6a7c35b0489eb1e26e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:35:32Z), 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/DEAF71457119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8974602b3685cb19c89f60b4b37f1b061e924f38ec869e2223c7efbb500f341c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:41:46Z), 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/DECY61400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382460222070ea5c7fecf0c4461cea781298d895aed7b2efa3170862860a4b05. 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/DEGR72012078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5b22af3920c63cdbccd662d83d57f6f9347d92703c3a07a1d0abfa33fd9abe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CALVP1937636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640a524ef854a759dc2e83794147af75f0be52cc56b2dcb81c97d06deee3c4da. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2345464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17db5ee89408414c2297e287c67b38a1c8ae34a035576ad3c4c8e45849e99226. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CBEYJ2510579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd17620d3efd0f15a6c31ceb79a860f9e7ff0a859a097d9a07c26e8a6823e9d. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DECY62500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e42195e01809f606476d8d7992ba24a934dd22f0f65d00150fee9487a071ee1. 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/DEPX41800275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68b09f4b6560a5577779921cf3269a1a0bbd10fe296c7b1348d6316f633ce09. 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/NLC7F2000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752b4e4f899d6f3554a8f9aae02bac19c109bac0a6bcded7b29bda6f1003e7fe. 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/DEY471980371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0021954df36599aaf1f3980cd36e55ccf3711b14b85b4df155ddf576b5b5370. 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/DEAF71204152.