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 0x08f4e613bad10836eafb093f7b22fed6c163db1545e302a0f0185614f3baface. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55936eb0-8614-4734-909d-27fc2b10b7bd.json and https://artists.proofprofile.net/proofs/artist/55936eb0-8614-4734-909d-27fc2b10b7bd.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 0xba1dd0acc8c3295fbb380f501509f34641b9ce6b4140b8cf69ebf74458bc98c2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:29:57Z), 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/SE5BU1712525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ea3389c928ee84a583c5cd249b04ca43ff63a7daaad532a4f2a9e5900ad381. 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/USDHM1824674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf862ae00c3d92f9018d9b4f878b840dc8a5b107923f0137b3d34fc934f78134e. 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/QZDA82017687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7cbd97207a402931cfb301781030e3427c548764860b924590c58aa56c0a24. 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/QZWFG2323533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c04f1ef966e4fcab7ab9f0166373aac9f060c77cf1de4bae884ce6e4154928. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ72478204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13feba2d86c951dd4e48c1db619dde2ce6109f21fa5607061c956ce30bd898e3. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:27:25Z), 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/QZES62416145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b7624ca10301b3f5bdc920de9c8454e5d5f78779baf48a2e3c4c2cacc59bdb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES72483672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a818cf2420e61625f88e3b547775a08be134f9fcde131ad1b5dfa8646e6500. 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/QZZ7P2440359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6843b2ccdbb3fc2595aeee63a117c02db3427a5f7e1e12bc8125b02a40caa4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ22599827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb11249e981cf54403d19ea08272602d948343712f6add336c6dcfca9399420. 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/QZDA72547908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce70e3ae7c83e7a30327df3f26c025815dbe5af767ac854c74abe1103fecd7e8. 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/QZZ7N2544981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2eea2fa820cf028b6c9c22f5ca36d8bf2d76fd3a952a145caea1910220e68a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EZ2538105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd045956507bed65d5a9daf1f39298af16558739fa221ab7d1224e9979e9bc78f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QT3EZ2538106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad855c4066195266451bc36c100437e2380d1b9a34502b8d45e9b96e839d266. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3EZ2538108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5be1df266005ff07ddb57e221d97c78c762eaf6df952750dcff967ebc221fea. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:14Z), 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/QT3EZ2538109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe298a5ba215ece0d03ffba1b88008aaf2593d2b628010380f10deca54437ac1. 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/QT3EZ2538110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4564d3044581650f6759e9db088498013d0300f053720e2c2cd2c0a377c5b8f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3EZ2538111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388808a90f41df18e6b1c54f9e6f27c6477fd90de5ca55772f1b880007c37fcf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:49Z), 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/QT3EZ2538113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfd2663c38f7091cb1005062c41efad6ef760b563aa5469bbf5f8fcc4efaccb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3EZ2538114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015a1a6c113c39c572162802474fd9d2e310d413067732fd5c5e7f1c527d539a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES62378737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec212f47b980f8999c578c5f6bc8721f09cf56c26471a94344d3d67bc1d70b9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES62378748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c38b9198716952646abf951b2f5211605115175900b2e9740d7b7a778cfc502. 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/QZES62378765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ea6eb13006c49f39782cc6cc6fecbd5bb7fe212fc4e178d52de1db0a5f4e93. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES62376984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0769b225476e1f1c417a8978f674e170e34c502d6d74160e46ec2e07ac6684. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZES62378743.
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 0x19d4972674f8629deca74ab33fee40ac31c05af18de8b5b22bce8417998dbaa4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZES62378758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc30bbc17ba9c7fef2269f45acee8bb67324034b837b178fd88178efcc83908. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZES62377001.