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 0x95f223149891d7c69266c35a30bf64473e9c78791496fbcd0d7d37d005e13c1b. 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/298b6cd0-9a37-4b6f-939b-e3700b0a08ca.json and https://artists.proofprofile.net/proofs/artist/298b6cd0-9a37-4b6f-939b-e3700b0a08ca.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 0xa2178b4595d99f5a8c57c57a89aa8bd9e90b3ded54e43ee2eb8769d362755817. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42105519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db241a249a97f291d6d26297a553501d07000bd7425b08604b1c6ec1518b2ff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM22153285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41e3d53be313e62a1a663ee337671c8f74bc8dfd124e22e71e9dff31afe6c2d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/USHM22153266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bff8a6cfe835702ca8dcbfb29cc10983077d5ad5de6150687ebdded70d6964. 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/USHM82190066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dcbb3e294668a85615d82e22c9fe209237eaef249b7c390febbdde24bc65e2. 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/USCGH2233330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667f1e4da6ffdbb52f1f7a7dfcdda01dd0625d8a547e468b88d2a29ac3a67ff2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2233331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe544eb79d92ca280425704e3774d9be9d7193e6da654c28a28ec245e454deeac. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USCGH2233333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0fc3b80284b52dca38d9bab2babd1eb94e91cafff896a30aa6c09583eab02e. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCGH2233334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108af77bcb6f7a1e10abc65f756f2b374d64b55ffd624ec2af9fc6f818102976. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCGH2233336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13645f048b00d964c1b8d0265ca1b9bebbdf4460fc483c6232aa3b215c4aa940. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ2257804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb428f3a4d428f58ee8acfa8e83325cffc5b0269cd251ef70a3cf76ae8779949. 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/USCGJ2257805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30ef3affe10986b79be8e7c2b3e28d14e973714aca96ca00a6e39443bcbdfa5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGJ2257806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a68c69e72ee92596be2a1adfa11e4eee9c176e34b6362d8bbb9565506725ec8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ2257809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841a566d187b3d5616d753d72f972ded5b31ceeae62ddd8b44af57c33de893ec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM82375910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292e39c2b959c7ba9b000ddad5e73cebe2481958a8a85611114426b6fe4f4a34. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:42:33Z), 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/USMH92325290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf354853d76495e95fcf990a846cce469a2ba7f6954d0886a880f945b727264. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USL4Q2302877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84892fbe1b5a80497f69e751a8ef4638fcbc9678db93412479c5902ef22f27d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USL4Q2302878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71403e2354b4bb05ee52a3195447a9217fbc9580c6c02398d39e0314b0b2b125. 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/USL4Q2302881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d29c866eafd291e6ebe1df2b59fe2081b0e0d359fb23a4a7ce04e972e348d7. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/USL4Q2302883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f753d9a18e1d2d0a0773856db6410c392f9917a40c5648da98d9607f0f47c9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4Q2450204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2874f75cae140c767303f076246dad9a07a6544b27c88a4f9bea41149ea1402d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USL4Q2450207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632372073eea16235eb13035683d919bfd99acddea349016d788bab975778730. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2503548.