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 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 0x8ee519aa3d918399889a7e768d5bb386a2c44fbfe844e6d4b370242c7b383521. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbe07c22-2a18-4a53-a3db-ad61fc4147a3.json and https://artists.proofprofile.net/proofs/artist/bbe07c22-2a18-4a53-a3db-ad61fc4147a3.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 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 0xb0841df9ef12f941ac5ce9179d469f035ad22416bc8e107ec6c34ab9f06c0d45. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEQU2074789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4295f6d956e0f0ac2b421559c6125bca04be4b6f8d09e6ab9c2adfa6d76d3dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEQU2074796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba974735a7bc0c86d5c611674796bb513865fa3698c30ba1b90c7444629c1af1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZEQU2129172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259dafb566975cdf0f1d80491096782b741cf1f30e8a174a8c49fccfa7ee9068. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZEQU2129173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc59d9707826ec80d027d2d41f2a9890276789b1afbdb6a791b48f3d86864c9. 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/QZEQU2129174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d4870e51ad96e12c655da715b6206a14ba9dcb07011b469eb03317c0b924f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZEQU2129175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bdc059c9f0622a1f893a88561c7c80b6096af2e7b6897a2b7f15650b1df9d9. 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/QZEQU2129176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20297846b05c5385296850675e1f007ba7145924dad88ee1fff465f0360b9e76. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZEQU2129177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741c5d99c5b1b9f95f0b2d1ac3adb6d03ab7b49762b4f5be818f683c24c6eeae. 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/QZEQU2129178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b36797d4dfecbb1af9bc8b8312f1830c1a10bfbfa4427a5958d07ab4249c846. 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/QZEQU2106040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45e358e5c590657b06d7c2434e93ca47b77f8f5712b29109a0454ab23700498. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZEQU2106041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217ac40f5c511f0b759f0987387d16fe69ae4a01c15cd38f7b465f06553ee949. 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/QZEQU2106042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5561801396456aa03ccd76f11deff5cf0a00025d4d26fbad89ba11aab3d0953. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZEQU2106043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed407cbdc2e3f653e8b41b2ec1dade562a7f8fc99ac394f14cb7d4577b983880. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZEQU2106044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d07e9e01aee2ae4fa788a100a3bfe31963ffc3fccec6c9638669e5550763a1. 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/QZEQU2106045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f95cc656901bdca98a0030be5fa47ed3617a577b963d575d2034596ff6ccce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZEQU2106046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a675a699c672c69efaca863a11684f7f10b1a16f590acc08e21a59b3a261e3. 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/QZEQU2106047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03327875a7d5fb2040904f30b54a3d571842f2c424ba7c93e9c7ec67c1afc259. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZEQU2106048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b74cb1aaf1d2a6284d15ab826bc81f53caefd506b932d6b6d6ba2ce833b6ff. 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/QZEQU2106049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5191c56671b0217a80d334b94d60395f4fe4bd99db20da8a8d0858ca03ee0794. 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/USA2P2222426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef04750d15d14effdf1df9053baa306c341a8296c635185f13b783aa0343f98. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USA2P2222427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0793a9a80ef133921b68ef7adf347020ac6f11f2fb85cf11c72011526bfaf734. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2P2222418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6010f920ef90fe4235c1c2713d9eec7c581b7723d23b36f5105a36acec19bd00. 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/USA2P2222419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b5395a7fb94595e46436e4f5a392f018d6505ec2a835187e38bea7375d9731. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USA2P2222423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e8203dd243a0204af1c55cc3ed288635d1b622fdf1efa140072cdd04f1d47. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2222422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604f83b541b1f21e98df48e8bf15e77e5185df29328b99d30f4c97a44309bede. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2222424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c79abc54b4c2ec94da2b8180567131d6556dd95c0b7639ad7ff16b9777667cb. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USA2P2222421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c675c6c47cffa5d1d190748532adf75389b6d710413eaaab9f9c3e692f553f. 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/USA2P2222420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57122a4b7c2d58615e2e73a852dcef9c2644b11a50f70599db89cd70712768f4. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USA2P2222425.