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 0x4c63d0ea96b09e742e927966bbf5793404b969d3015dad3ee3c993e8cc6cad14. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e11a7bb3-927a-437b-8f1c-080f52a1ed5e.json and https://artists.proofprofile.net/proofs/artist/e11a7bb3-927a-437b-8f1c-080f52a1ed5e.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 0x5ce873be0973f8879fe50311f7d84aa4fb22d3366eba475cf0ec8a4f593aa501. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:51:30Z), 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/QZDA51839195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5271fa5afbc57f86d76d0f7c1c099fbc3e1558bcb38dbb2cc6f8afe8f0409c7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USSM12001851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbc556445ca4a45aaca7f22af82ee4d36afeaec25cc7a607ce5c010dae0628b. 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/USSM12002022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d8fc8574be9b6faa9522968d18a534cd7cb491b733de4ce89ac48bbdf6866f. 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/USSM12003578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6b66f2904131b34ecaf85ab1082efd95c14ca68d9f0f743e3b38b4d761f83f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:52:21Z), 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/USSM12004915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ab734a1695d2fdc1163aed5a0de3ac8d0f72a8360b7c74d9632bd3cc0c8104. 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/CA5KR2171707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28784921aecb435eda47e973d61e7134a217a379af96f9629523cac9f4d452c. 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/QZFYX2271744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e35f886494413d9f470b422b62b26b11558f2aa5e0774aa8df376a5c0b1b4a. 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/TCAGA2241690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6b381c204d735e3ad3289696a9b8652beb3b8b84475d4fff9276c45728e1b3. 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/QZK6J2255261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e8aa3aac21da8a01f0c60ec1ad7f550f8f2f286902f019f94fe24495d8e223. 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/QZNWR2234686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6388fcc7f9565c2dd8fddaf7c08c46d919c369721892933b2db0cdf3fb7b469e. 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/QZTB42266592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef21fca7b8d9e34077304a1ed34eafa633ce22f6d858d80c92e8a6db85787d5e. 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/USA2P2351589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27a70c9e9f932013328b7a746e5e855b2e51a0749131f88e8d21444189a9fe3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2351590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed4d6a5ed6ee15ba2ed2beb90d381c9a5c8439c1e7e808b9f148bd947c5b1b5. 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/USA2P2351592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7f502925bc34a984854e05fe4c8247c24908f7633efb089564e1f19738576a. 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/USA2P2351593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5f82758916fe846169c1f8607b915fd3d13926e85e082c5b3b8fa974ae5c03. 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/QZRD92406125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4558c25a10e33b2b3c2be3939b8a0a4094923a79767c4d4c4f31c338b57f0e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA5KR2538639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e40cbeb66052605297f54a7ceb0912d151286287af5fc1000a622bb140b903. 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/USUYG1760103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5d92ef037cba046fb48fbe43e595d4331e621d668c8114ad91a3b7b88ea3ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES72299410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3420c0fc5326829b1794cb91d79aaf837d7f1cea4444035edecf4bedcb22c729. 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/QZMEM2397943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da885247bea71fa9ddc52363507fb3cceb313325ee57e8b022277813a7823ee. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMFME2033867.