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 0x2cd29834f4469d5b394afb40a682281919ab2cc34733c0b3cd5bf97b3e158124. 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/f5d8af89-df97-499a-a486-b225d8b9c2fa.json and https://artists.proofprofile.net/proofs/artist/f5d8af89-df97-499a-a486-b225d8b9c2fa.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 0x8de32c340c39fd17e1cd840100d93692e992af95b9e0bd25e8d403c03c6003da. 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/QM7281730279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7488bc2ba3bce543e0f55414eff603a57de8410e649789538609ed9ab261663d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QM7281730249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108fa1798d856d2f7147ef1dd3c392b852a5fd6bbd026d0cd4c2d3496e62def7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QM7281730251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4b52accd02c5e3b7b976556a4054dcc83f4f29b31746add91480b309e409d9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7281730254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c386e99c781db97b25250b55517c8049ca5aa6cfe2c759bcccd7d5f34474c6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM7281730256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc345bd5b1abc477a0a93a366dc63e6ea950df7a095f613800d8a2f1b68ed36. 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/QM7281730258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8258249b457a5ee2d93d92da4558eafc9d1e3ec4f5babcd73ead0dc7e3ca3d. 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/QM7281730259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f94a312924c0eead949da2da17b88b561f14970c44c49bb600d7ca6174e7fa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7281730260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7311e819d20da3ded91f00c6de82198e237d3b16ae9bcfa19ff98179cc9455. 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/QM7281730261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896ba023554f18ab71537a8fe6d4d64c66a772feb0865eb3cb1c1bbde8841192. 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/QMDA61585724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058461694b9cdd8b3db9fdfdcd631b73173bb7eb6ce0ebae9b00f400e5c5dfb2. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMDA61585725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3164df8080fb5224be0ac5deaae2dd5d8559be9ea33068b5cbddc77b6e78a94. 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/QMDA61585726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f91fc967e861a8bf19a9d8e5a44d3c2bbb3509a6c761705264dff6f14a8fe6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA61585729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8855915f457c6b8d7678cea459b05ddd7e3782ee2ce7184c781d88cf0383a00. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QMDA61585731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb623626d989f54a42cca4341fdc9a7bb2bc5614b2b89c3a2a865911ed102611d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QMDA61585735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5e953bec82f936a81cc29e7cb015838edb091beff46d8828fc4049027b20fe. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7281730048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc335eafd3100c8c3cdfc94e81b0ac7ad0c22d68632bb16dea8ddb2252685d214. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QM7281730069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2978514f512a57e5f27f208bbf16badd219f4d203231e116160574ca3a0aca5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QM7281730053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b7b53a444d48409a9a3e67fbea6670da741e44a3b0f2ca0c3c4f3b2c88a1a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QM7281730055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4882ba51b9dffaa6f63f2c3edb6b561ca983f6a6aad65dddf2db3d81d369b2cf. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QM7281730060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb442adfe462ea1e0b959398bf86e4e7af94421e4da4c2fc6caf57154eb46ae. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZA78B2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaa1689538baf18461acf016dde7d3336bb05ec097a8b9b4138986eca2d230a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ZA78B2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6756d8b6cb892962da22d2b6443eef18ecce09cfd34976658c16882897def438. 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/ZA78B2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ba953feff642c083857ff5fb7a840cf96c2e8211a7de75a8cff67a2133581. 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/ZA78B2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc349f0b4b4d16ed7e59e83b597c5d03a883dbcc2d420901ae00ca2c8e2bc8333. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZA78B2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9cb622914d4a95aa54dea7144a55af22cc66f8d2b2a58e4c032f44d9c67676. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ZA78B2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c6c236d6ea5da16e490e33c97400eb0eac862b086cd2ef8ed8a78663d30721. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ZA78B2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792c9688cc42007a13e2d8709d9cb76ee374d635c88278bea6207d600553a4a6. 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/ZA78B2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bc0ea68459a314076fabd1c98b20b4082625558c8be64073b745c7f8589626. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ZA78B2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56855958d60b383cf735a71075140a35dcf71999fb67b5da9d2d19198f6a7836. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ZA78B2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2124693f6e12f78ed3586920c2fc5facc59d45cd54ad52fbfbae6dcc21595ad3. 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/USA2P2534909.