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 0x2c4edc1aa486ccf4af885caa886efc3496217bb2ec91d74cb6bdc4ad5af2c23e. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10805fe8-f209-4a91-821e-131b16351c0b.json and https://artists.proofprofile.net/proofs/artist/10805fe8-f209-4a91-821e-131b16351c0b.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 0x97bb12685863cc805c02eb5c804ecb88df23275794a851315791cd907a44798b. 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/USCGJ1555162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692d6e8f0611b1025491492bf734fc460d6f89c041489a182f350387cb4018bb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USCGJ1555163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b8c99cba539f41af1ff29a87814fe696660a20bd055e19f01d1112d0d5c014. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGJ1555165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e418324cdfa8654a4b989e0b6d8ae84d093c9b83ae11ecbfc1c605b8dd8cf84. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGJ1555166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e41d560b1d667315c92987eabd0d7f90247ecfb558d98dfa4efb3f702a9d0e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGJ1555167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3d9350fb331d5f42558c2f5772df75b25c9998ba77e6d3a97386d3c1cf3b68. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGJ1555168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727310067b8ba049b74b7790840327712ab5337216a3f3451b996e4dc9dafd1b. 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/USCGJ1555169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4eb79d524cfe11d86d54e15eef8c29a953cf19060ee6c081aa8f027b0a4ae7. 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/USCGJ1555170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bde4807f12de8c10d2cdd44900d549138ad859e11ff053b729daddb29a3fac. 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/USCGJ1555171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b69bb101cc1e0672342de7ba1f70da6091beba44bdf54a18d4631219269ad4. 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/USCGJ1555172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26d5424395e5c1c13722484442b33162e1a541ea36a8fe13e8208f443c75974. 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/USCGJ1555173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d33a067a77953c006ce5727fca36a25f7b3db815d5ede886b71ea6c48bfad27. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGJ1555174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68c0a469be89dc161e1851a2a2a9f244c0b93355683bc8e29697886146cb5af. 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/USHM92156356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55665b097fd8b7b94e09157e69ec79636e6af40cbe8f27504bab38b7946b9dc. 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/USHM92156357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28888abc9a7472b7ca427bd24bc86d720726b2517901008da3149f3bbf92d220. 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/USHM92156358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea9874565a7143d49801060d2a1dcbb7a101323cd757ad3167c4643dfa71e9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USHM92156359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c1555b57847a80fe8843aeccb396f8f46c68e5fbdb893346e6eb74e8d47fcb. 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/USHM82044252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526a67b6494b443c2e7950fe10fa3da01fe9c57ff36a25d34a6db581f216317c. 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/USHM82044253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ed0e7748c6af079743bedf316dee1b815e34bc76cbdf8165ca87ce20d1dd3a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM82044254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a19ddaf1160a0805e6a6ae64f463f48e7ad2e755a35bd370fc2363e956dc8. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USHM82044255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a0523875b78a2c9524a13dee2d155b3ee49a4102a1c72388b97cea9faa05dd. 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/USHM82044256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707da53a7f8454dad4a54be75925ec9eef838979dfe9ff98fa383ff3ef2989d6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM22112319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa217480f57153963cbffca75101cea0bb7b3080d8a64b5cab399c01db49dc923. 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/USHM22112320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d672e9775e7f5e06d3fd3a403ec16249714f5ae59f6c5a8deb1b15c77340b2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USHM22112321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7556e09d2fd4980934e0e2ac068467a253d21be309e389949eddcce970eb0067. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM22112322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ed0e6504fd3f3a88efb5e178b4cbe6d88b94e9921b5c0fcb0781ddb68ff3a2. 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/USHM22112323.