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 0xf48a34ffa9bb1e177509aa174d66373c5c7e566894e83b9f3afa6a5f2f9f2687. 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/5d1e9a91-0c5d-4f8a-ad8d-182d431f6d6d.json and https://artists.proofprofile.net/proofs/artist/5d1e9a91-0c5d-4f8a-ad8d-182d431f6d6d.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 0x0a6b6401c56bfbb0539eefdbe1504f155eb83e408ee5aa1256b1e8c53b025773. 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/QZHN52290072.
Bigger Than What We Got (Ayowitty Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2702b59466d2a1bd13f3e23531f3da5344561d7a1fba0157b2a0ec76d49b3142. 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/QZTB42278401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed642b9c785429d2f5cf4c74513a2bf55515239f2ec28be0835cd7b2bc2f24. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZFYZ2326241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17745288f53e4153d390d61244004efb6d7e717b9f895fa45f20bd6c394c6e6e. 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/QZDA42327771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0cee7ec76f2aad5625ef235739ed86af653e50e6fbba64ef842db374460137. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAZ2374244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa63fe34ef13de593317c6c7ace501746f24463685991ab76334c91fcbdea1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFG2363329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1de74dd7bae9c03e5dfa825fbb57a3fe809102abfeb916f26684fe45e9eb23. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZWFP2315147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed566bc764ed319637887543775b66ee0d549028df12becc54ea7b5c20d7ef9. 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/QZWFQ2330937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2464c6faecae211f65fb7e2a1b91380196dd2b44d77e9752f8c248dd71c595e. 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/QZWFQ2330938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cbdbb4f1392f1fc318289be61851c7efb1addb3d3bf1ad5b83b6b40447a140. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZDA72434861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c0bb08843f62299290c16e88fa7a372977fb65de52b9dd5ac96ef41a7c5424. 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/QZES72448009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c726b625a067be20b45814744ff05aef3ccaf30649ea88c0cd9ed1381a18ad9. 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/QZES72448012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8883183de3d8ad10bed42f5836ab0400209ed688ee4ef9a986623325f4c3dd58. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZHNB2494715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51ebe5bede3cea2e85ea8f19f0bade218668f153f019e396602bc0e90013c93. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWX2441108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfe3c7891c7bb4883eea1da36180187f7155e223ba6aaab6e973b565ec0a925. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTAW2428103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a89651196fa3967e595141ad4239d31871af367b6f57f490366c490e5de4611. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7L2483230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8f312ea8aae5db79f05b17350a9922395d781a6a48f121e9376c14354698c5. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZHN42576843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aa09162f8e66a87780ebb2de4fecb6e6d721e693fbb7e7776d17bffe788474. 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/QZHN42576844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa6350294a71eda2a60c748e858eb0445a5c74dceec7a9f0b717229e2cf8149. 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/QZHN42576845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e409a6783cdf2b1ddf758876a58f231759a3ad9fc957a1abe90d5ddc38dd1f7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN42576846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a264279c6ffc5390ac8e557f7144ab8b48b1c0c59d65fa28d3a4d27c49f73. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN42576847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216b5767144b9e142d41a2557ede18ea2f0d9690b1bd9aca30577e96808a89f4. 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/QZHN42576848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33ec8d023880af17849a4fc7615b05636860b97b66072e93ce240b34991f316. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZHN42576849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb562675c22a534c36b61a7cf97e369db6d9062f14c2899a16f2b416d54e23435. 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/QZES92576527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a2fb98bb22d15a08013bfbaaa3c58b418b648af9f5e2ffc3c58be5f7fbb19. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWZ2553288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c85b0f264b9170f20cb9b40d9b0406c7de5d1d519478e0ffa1a224b912a37. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZRP42556742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40dffb91495596d375a8920455e0980bbabd42571c07883ab1e855d6489c7b9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTAX2524077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fd91d38850538a81dd9c430ef92e25395d6485393e632de31cb6d61a789cd8. 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/QZWFF2586210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ea64b1bba36440e7976fec0675f363c15a2e456b11f740ec7572127ec6204d. 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/QT3EX2524955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4471809845eac33c5d4c6485a08a7db8e348f6423b7c26bd89a5b8c561d86bd2. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QT3EX2544015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da7d865dd05ecec9b5b0bc3cc6ec32efeb95fcc5e8ad29b73b7a24d74b28121. 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/QZHN82108789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce79bad5387552c0c3a1dd2ebc90cd94c6b0c1a75b0b9b5cbc1e1db36fe455ba. 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/QZHNC2177814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2618cbc6dcb827c4d19b55634d247a046cb2b0ecf8f019c89d58933b94a6af00. 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/QZHNC2159830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033f10d2104a4f4a4a46c59d2e337c22d8ddb4d88fbb7179e527823e208e37cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES92133031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a0ee0f5844907bd7326d4a83aa3bb8144ca8a7bc3189cc389e7f30193ebdba. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZFYX2187558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18035f5006f189120b7af4b475d27e6c8e88e9a9e5decc191e51d707c0c4b451. 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/QZTB92242277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e845e2cb056b04f33d8ae24269ac74bc34a7d01230799e47cfd10cb4d65d80. 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/QZFZ22311440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950a53daf074c15700449fd53f243833b4ceb94749b07da6da750845b8f0a186. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFYX2390752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf722156b687565fde14217346dbf839163c6c14bed8bf44f79d398de80c05056. 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/QZFYX2359497.