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 0x4538e27e52042ea2d33243c19cb47ef1cc550f47b8812b30e09680b3bc67dd92. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e7f127e-2417-45ea-b1d2-61b8c928229e.json and https://artists.proofprofile.net/proofs/artist/9e7f127e-2417-45ea-b1d2-61b8c928229e.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 0xe3023fb33c20245155b54c68f0ed60c6064c0b9599e00b8b3e821304535e36f2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:48Z), 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/SE5XG2417620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f17a73a71c7719f69ce7f8cdea54d3994ea3c1d462bc2f2c42bed3ac1ab244. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/SE5XG2417621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb72d578584ae5dd1f7f9e6b6911c38f7e3a93caa09c857cf4f0217e89740c1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE5XG2417622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c1c1852e8cdb8465507c822465948bd0b11c0b0f97242c468e95de09dc0b4a. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SE5XG2417623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe6e5e670583995eeb450cd5cc37ae46bb9d844890000d5cad67397b18bcfff. 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/SE5XG2417624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e14cab281b5a9ace3dc56e02139f3472bc9675b9f1dc43f7e8a2a7fc0571dce. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/SE5XG2417625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9995d15de88a2cd401e98fa970ab30264c34885841b3bc73388e1a24829a0576. 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/SE5XG2418908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97faf2d7b598c46b870499ef25220ebbac8d291aeb7dfe15696b13df8680bc6d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/SE5XG2418903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601e78ef26038a2432f19163497c404f5852f1f57bf9706aaf13c7cbadc82775. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:33Z), 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/SE5XG2418905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4c62870ab2329e3599a2f8576119a8645bb72ce7034da6088cd29327f0c5fd. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SE5XG2418904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cc2f27808fa77b3b3f44162886ceb1c2108e32cf71c8efc19d6ead5991dca4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5XG2418906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc145a9c7a3c61a3ef730bab8177b08e34c483ca8e5b8f8d64d9ee4bad33700. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SE5XG2420000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd334961beedffccf536b12c9e0f9e1c30d9b5f423c8be4a7d27aa82cc73e0749. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/SE5XG2420004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb044bd8c537999bb8744e44f2eacfae82f39fc99e0406fe8ae3137e679c17d08. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE5XG2420003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf1f2fe931285970ea1a59b43b6917d160d750c11677cb160014379038efe23. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE5XG2420002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17afe041537b495b973de6c1e086d1e2138e4d10c569654b67d24f2c9938fce4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5XG2420001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03930b58fb63adb4b18f56c7d63f92334557e37209130e3a4abdd3c4fa99ab1c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5XG2420005.