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 0x8bf24f60e5aef2f519e8c7141ac8e3899a41b0ba391f998d94f0bfbf5bf1cea1. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02f78329-6968-488c-a38d-04c40bd8205a.json and https://artists.proofprofile.net/proofs/artist/02f78329-6968-488c-a38d-04c40bd8205a.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 0x8b0e2fadf4a67a2e142f6db11399cddf50be90d132efcdf8c50f33c8fbec7196. 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/DKUM71800270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cb941cbba58d21b4646efe0de23799cebcfdc8ba49bfacba645a29b1a04874. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DKUM71800271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c668b3c5d003e703523e38ccd523a1ea94d51ecfb6b8fcdd07c39b46a0f5628. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DKUM71800273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda20e27695869362a0e90de58cbdb3aecc37ca22ecc62827fb614a3af2ef32cd. 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/DKUM71800274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc96953d3b2ff3ebfee1df02de2ae00595aa412b6e78517bbf7f32d3592e604. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DKUM71800275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161f761ee2fbf97c2465d90fe7b08cc04c6e3f0b4d4ba32b616b5f5f53242586. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DKUM71800276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3cb2593fef385bd11d5c627be5e6d913be3444cb593faa0cab2f57ea6bb682. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DKUM71800277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05e3b4d615247462c764bf9b0f5a66f3342e6b65f67f4a253f26ad1d6cfe938. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/DKUM71800278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ccbbaad38238573170fed68a17feffb141a55677c8aff1368157e5e00352a8. 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/DKUM71800279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7cf9abeecfee2b5bfcf93493388da02c0558b7ec789e499f5a8f8919c403be. 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/DKUM71800280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd077cbed3cc2d35d96cb0dc39a2b7f42269d9e7ad023af0e602084511278b202. 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/DKUM71800281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44338c01a3d75eed9c9b50968245ceca90f87a39aeb68ee3a9eac743fcd5af58. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DKUM71800294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814447fcc2c0bcbe3b0bcc3d4f0698547e477dcfef3b5aba7250cfefdebc1f54. 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/DKUM71800282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf81d688eef13031840989bd642581a9feb133f675bf8181d9ed838911de1352. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DKUM71800283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4af8e50e97b7dd9c4d4360b669f3f3a230261c6db38c6c65bfb4790db42673e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DKUM71800284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2103a9b8089a2b72e3a52196157312c8f089576c6c8982dc1fe8ab03fe08fc4c. 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/DKUM71800285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a9dfa3871e29cbacdfea9d99d6d44526ab07b8f2e0495c51962e1f90b05faf. 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/DKUM71800286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffdb3c25ee14b0f1a381c0170f8dd2949a16d934fe98619496afa89506f8000. 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/DKUM71800287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1627671d1b3cf6720cfd03464e11f1ee2b596bbb0fb6454406b2852c956a8bc3. 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/DKUM71800288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7a4ce5e71069fc56a531b49a01b7f2eafa219648f0ae6c496db7ad36c3bd4a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DKUM71800289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423c2e530112bcf651b73fdc96cd0d86b93d31a63f4c4763d62b6b8a002466f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DKUM71800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0d55093b6e72e2973073db7db4b706699dc46831a7d13ad5a22a9155af9f4f. 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/DKUM71800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1be1af5fd90878eb7dba5b1ca369e3a1a2b9a54002e77117538597783e60fbb. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DKUM71800292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92506b033fdb2ebf53bb042b3b18e50fe5994f76ce724a3d89842e63143ec62c. 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/DKUM71800293.