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 0xfd9c3720eca8725f940040f15ffd24d2f8188baa225b9a93773ab1672b7abd0e. 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/92ca1fd4-25cc-4797-abe9-f66a66f10979.json and https://artists.proofprofile.net/proofs/artist/92ca1fd4-25cc-4797-abe9-f66a66f10979.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 0xa040410deb7eb98a2fec8d824c9faecaa31c4bb9b9c37db35f47eef42588edfa. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZFZ32052491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7ac68a5e476c4800bfc52311dd06efb3462108598413851848e9e1aca98553. 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/QZK6J2052779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958a6eea5583a61e4fb01c79f8e7338696cd97428e5fcf795bf76ef08857b1b5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6J2052780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9651d370f29a54c31b6040cd3f2a00813a665a8d9eaef45e6461fe6c875a0a1b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:22Z), 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/GBJX32163607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373e17a87e942382069352a3f5e968dcf4e700d945691199c0dcf9ca9b35acc3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:32Z), 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/UK59G2200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d64a97ed94575c3d5f515463be9342284370d3ae67fb22d87a441745965dd1. 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/GB8KE2308533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43453a2fd99f5a3571210b3ecd950245f2b629f984c4bf8f16cdcae7a3d7c0cb. 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/GB8KE2308534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ebbaac619116b098ef54dc93316727888835da26b6dd1f8a314b8c1c6deffc. 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/GBKQU2399475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd824800445ca6e7f175cc589869e6e1e9b5048060687420899000e8c7498595c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBKQU2399476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9beec4e0a488b4a7722357d59e8273770144078e880978e886ded63a276ed11. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:08:46Z), 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/QM4TX2568667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6498fdfa26d6c75b40ca8c6ffa1868cd5bc5d458c300cb8f8d9b0057e7cfbd. 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/QM4TX2568668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25113b039fa9674aa0caf586a2e2406d93615ab1827b5da95d644019b9878c2. 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/QM4TX2568669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ad7754c52d0f851d5b90b22edd4201022d243f804d118582f8be9e6b7679b0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX762144331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3104bf191db7200cdc009c9784d2caf78033c8d34d833d60643bd49273eacb52. 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/FRX762144332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187ec147f69bc355793219185c59d54071b7024871e1fe6d7a5114bf1804c390. 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/FRX762144333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910da80ba234a2ba02217ec9dd891ca121779f74d072343452b29e8cfadbf1ec. 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/NL9WP2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccfa724cbd8d8de0da7f3477d7fe2f13eaedf9ead790527d1060519b68f5c80. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX762144334.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch