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 0x2e8cd3f0d788301f3ae8ce8e80c31ec56f794fe4e22161e7237ec1175ec5a9a9. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3ada62b-6d13-4b88-9808-9ff0ace64be7.json and https://artists.proofprofile.net/proofs/artist/f3ada62b-6d13-4b88-9808-9ff0ace64be7.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 0x28b7865a194d9dd4e0daf9fb100dbe7a0980cd31a6fdfb71eae644033ea06892. 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/QZES92366265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921ea646436ec099f5220b62a92186b053ca34024adb1112c48986703d0cd7af. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFQ2386579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb126dc2a6579d22c49b5247c2558009246c15cf64c84ff7dbd7db07825eda00b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA62497867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8ebe78a7c2a24f826fb5b5bcd06e8a6eb5e45fb9e3d56e88c3efd7098e24c7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDA62497868.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7207bad08915d195e03d66607e76441e1e69ac2a1e2be91f9b74f1441df6853b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZDA62497871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147a1c601eb14f5f9d86f023447ae8453087b9409917cef18c659e9f5f9471f5. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:26:33Z), 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/QZHN92431020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe6f890257a80fe17f8ca7933eac048a54e7e375ea2f9a024709bc8fd0d085f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:52Z), 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/QZK6Q2457827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8759fcacbdb09dbd98ab565d0f744ce184083bf572f2678643b20eac1b99b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTB62447302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4337a6d567c7be0c6b51727cf4f2881e3b7cb3fa3afe2488eaab754758f5bf54. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7S2458830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4c53e3b4b6b7b0e0b7df1fe9ebe701a713b2f653f4891590d90665a6b8062e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:38Z), 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/QZWFM2450705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a8759fcacbdb09dbd98ab565d0f744ce184083bf572f2678643b20eac1b99b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB62447302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103b5a6d8c179a5ca7deb8f1b2ae027741bd66e4fc66e388f1e3df916d45c8fd. 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/QZHN82533722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e999d97eee3d6875e1d861d118a445cf8a7af57c3fee94d45431175fe4e17d8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZRP52598171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed477d1f4183fab398363fab0f1aa9959928d6d21ea16c2eb8c6ad5c88ff86dd. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFG2598799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c11ff1c0671ff8519b162ac1b6b988c6ee28ddeb3b9f4d28f22388649cb7494. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTLA2555564.