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 0xe5fb0b5b1a99528e49590f36bc98d1da9167be1da0595de826d3568400a7b353. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90caf0d5-df97-4e3f-b4d6-428fcaf822a6.json and https://artists.proofprofile.net/proofs/artist/90caf0d5-df97-4e3f-b4d6-428fcaf822a6.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 0xe9e39d088b3300ec2a4a1d9dfbc56aeeede6672629895f4465c8ea1fae5fae51. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/US3DF2485494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a52b039d32d8a3d12cc5718655ee4049a4bb56a20863a0049c43d7feee65be0. 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/US3DF2485496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09def0b3f29b1758c6bb14b433fb107ecf608a928cae9295ca4667278241702. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/USANG2237853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784b32af8405391a05579b9838a580f1ebbcb2e9491ac06d81ea802eafb6fdd7. 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/QM3DF2168623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f34e90ec9139f015fe90710246af526aa792a67979f4e76c7076e5f0ca11de. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM3DF2168642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac88f91e8ee94ae7158287645196ce91e4cfa92e110dfdc6acaddbaed2b7af5d. 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/USANG2131836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9086c7d1c087385a8ed6a1d0225075a6e33d360d31c5e4d35dc054eab7d1edc6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USANG2151909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f121024194d16bbd468de033a942bb3ab0282f06ad3aa6f42efa5519fc1e1b. 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/US3DF1988167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef014d58e8d8cf4af7ca90b1f111b02cb1014edbb8557470f887908eb90f5fdb. 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/US3DF1988168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bd70d2a78e3846ca7b1838c9643c822e796bf4e4d6ea10654b5078516f0dbb. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/US3DF1988169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1751c49b7a69b71d0ea4a9a62d34024e4b34d2e5412e1c789b4f870f1a9bc30. 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/US3DF1988170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa0ce742d993703432b25f08e3298c4b71fa81b5626cd54309c345fe31f4e0f. 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/US3DF1839368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cadb6f77420d3209102c20039e9da64c470f85c46f522759dd8f18c294c642. 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/US3DF1839369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480b4ab026fd4a87756eade113b414109d2868cbc8d9e4bf2abb73e1f682437c. 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/US3DF1839371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188780a9bc8fd5e578c87024ff3a14ed1dfcb7531d3fdca5cfbf663aa72538e5. 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/US3DF1839372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f2b6d117036fa0ead3536060fe29b7d07ba3c5205a0b681bb9ca00763db9ff. 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/US3DF1839377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdce496e35f52130dcff1163abe9a8fe4a90dc054ab7ffa4b5b8be0c5955951b. 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/US3DF1839379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62eac86338e9ed7a7a4a58f6ca11adbb29c01dc473e52e17bc27beb172b573d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US3DF1829849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d74a3d00cc46651183040303b0d180f533e6f2d5e15706ea68a9ad8d7edd296. 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/US3DF1829850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eafa557ab80597e739de2d4b845f4a16c89888cad8ccbdd5849bddc7cefdcd4. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/US3DF1829853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90cc02f897d732de947a48446e7735a019634ff08bb829339882ddc90336320. 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/US3DF1829858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc302937ea2e5d30103770c75d39c9cf65d7cfd6bee8c020e51ad319eba7220b1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US3DF1829861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5284c674d369156cc09062f855da4a0ab0639ea621d4ae262ff155bb1b860207. 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/QZDA51849531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833e5c4ff041293827f5224f737eced083a1de3e8deac87504cb4c4e14f37dfe. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US3DF1110432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a29d35800de78ec78fe8c3f131e86dc749719d9e0c4de3d3f65cfe2f14f130d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDQH2414286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d26e130494cc421a5f854552269fec21b512b0cce82870b93a2b5dd9e5eb4cc. 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/QMANG2219637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d364881ddab97f1f743d51c289f544452fa215b4456f21fb50c376896f526b2. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QMANG2219638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5428d2fdecc3580bbf6e29320c4bb37e54e88cee414433381f48bd6c7220c74. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMANG2219640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb24635ddf44d372ca69c9f6c1e894b8bc0d3b6cb939a915d98dc564fcb707b. 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/QMANG2219641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ced08a905f629a293322aae89449bbfeeb771c585c177e554916e124512dd9a. 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/US3DF2283376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b586794b8a6d141a03e5537cd3e2646464c3d2d5a86bb69455bce66c5f12687. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM3DF2147867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811578862ce0232be07e1ba9be4fcb24cc2f3c926f25a0add55bdcad4a0cf68e. 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/FRX282194033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac88f91e8ee94ae7158287645196ce91e4cfa92e110dfdc6acaddbaed2b7af5d. 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/USANG2131836.