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 0xee181c27ae63f20ea2780e68d1bc2f5a230b989354c0c004cd8811d1777d5f3e. 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/b49c3cef-7ee4-44e4-9232-98e4a28ff943.json and https://artists.proofprofile.net/proofs/artist/b49c3cef-7ee4-44e4-9232-98e4a28ff943.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 0xe5656929bf2ac7dca629005f6dcf91b1b77883ffb52669643405aaa19a2b2981. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/UKXN22171268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461de825286326b95cf7f6f8e9da38f06ff819d5de728d5191a8e4467ff9b4bd. 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/GBMA22165421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692669050303f565e508e15e76a773f95ec475608d122a32b12a980b2a63183b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKXN22112310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecacaa69626f092f211f3b40bcc2161e86eaf3069982fe889d0875bb6426a17. 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/UKXN22112317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace6c3a11d40b738e075cea5d8794f4fe59ee9d6d1203cb497b2e31bd6c9759. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/UKXN22112325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f69ed9759d0c46c63b07f37c3ced1774c2565bf1837b524812a973d775d25. 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/UKXN22112346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525f835f1bbcc2c5cdc53436da90756a54a91c1ac7f16780140e1ee761714d9f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKXN22112362.
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 0x4ab4290939b184db819c7af1b2e69b443d4a27ff47e200ace1190f3ffb6b1305. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKXN22112363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44586697f18dcadb8b3a838bafd62f524e000ec0186466ca1a3119dcbd2744a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKXN22112364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dd87f9dacfb8a20721657c3bdbe247b8b7a9fcf396a5091b20bd1eab8cf1a8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:32Z), 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/QZKWA2042499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410f83f2d4f6d0acf5774da261762bf6049df511b2826e55e45510dd9cab60d7. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GX53U2306910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf276bf006e2cf80a989ed5d6d94d4c005f18cd7b49f37ce2fe3143037ffe47d6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GX53U2306911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbf1d3b48efb574cd3b5467c57d5b5fed1fe733c7dddcb87cf7f2809e1d1e59. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GX53U2306912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2df4c1454fe38d104cc24257c659814e3ac8a5c4fdbe6a297f25847e7ebd9. 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/GXHG92581110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4ac32d4fa4284ba43cd5cbcd4c3e4c776819a56fade09dcce7246199ea21be. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GXHG92581111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48080f4386faf512c8c6dd4dc7748a132972fc32a816f26859cd2948ac28bfa7. 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/GXHG92581112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad4840772bc80b91616486110540b9b08c28e89fbb69efbc96639ce7755cb59. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:08:49Z), 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/GXHG92581113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba90ec4609860f4d70c5a46f211ff73ef3d229dade1266928b481388b4cbd101. 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/GXHG92581114.