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 0xd35e8d3e129ff58d821405abfd1346e0e5b1e72b4377525148abcd9126ab66d7. 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/5ad785bd-e2cd-40e9-a50b-66dea1469327.json and https://artists.proofprofile.net/proofs/artist/5ad785bd-e2cd-40e9-a50b-66dea1469327.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 0xe7408a7f7986ab13215f85ecd1fd4b3f8468eed54a9a0f2363c722d8a7626440. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKNPD2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f40e1a15a42f712e6730c10577812356b47539c397ffdb4f359c8cf03cebbec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKNPD2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a232f5495a0d6d315d2089a0e2b0a3c2e4b72e322e53762bb8e6b3dabc197a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UKW3Z2200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115a0640c1e21953fc21c40fb1cc6458bc252644210357cd22d443368f9bd30b. 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/UKW3Z2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115a0640c1e21953fc21c40fb1cc6458bc252644210357cd22d443368f9bd30b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKW3Z2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f40e1a15a42f712e6730c10577812356b47539c397ffdb4f359c8cf03cebbec. 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/UKNPD2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8809e4613e4529effef341ce99c9c3346619fc6a544effa3194f2461fba38b94. 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/UKNPD2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614354b5f23fddc5040b1d46365ff9b9c13b05866a340be1a96ea19610e02b7c. 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/GB8MX1901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2ca71376903c1f949f02385510fd73530d54e375a3665bda1673885950356c. 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/GB8MX1900605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d07cecb6ad86df23c84acb71a6b6454c7a08472b5aae7c0b3b85d41d88d829. 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/GB8MX1900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e532f1970349a708cd36d6fddc31d37da545b906b1ec19afe307a02bebf8e6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB8MX1800931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c1ee97d61b0cf73757c14ba89163d34ed3ea0e20654e4e62e0affc57f788e9. 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/GBMJG1801175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c8ef6287f41607760b9f009bd1e1d47fdcded487f92e7f9b401833a97c7600. 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/GBMJG1718980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5f4afed02f046704ee34630189756bbe2a3b06b264772d2439d60ee1b9f89d. 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/GBMJG1714782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464081576b45f0269c135eebd84bd75fadc30c77e122b35b22d2f801bf616e94. 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/GBMJG1615895.