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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db8e841ea5b8c8fb13df1f72b4b45bb5945ec17be04226bc0e0d9b2e317f450. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/319c87fc-b721-4e07-870a-a17b0e9dd984.json and https://artists.proofprofile.net/proofs/artist/319c87fc-b721-4e07-870a-a17b0e9dd984.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42358490cc3ee5958caeb5d5bb7b40ec2e989d0dc31d0d914fea5cc0be42b17. 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/QZGLS2463308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98d1834fb9dd929c6156a6536318360ce3bcbd5f0f546645f2a528b99155dff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLS2463309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80c28401f7259c5f4673d33f6acdd227936a43fbbd8c0675b370103f17f285f. 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/QZGLS2463313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7584a6ac86dcb1acc2c309c3a95f705ee838ada4ca0ec611af5783a5891fc1. 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/QZGLS2463320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8658eec3266b36dbd0af1dae325ba832b31fb5ef4e965797728388297903d7ea. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZGLS2463310.
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 0x79fc0af28279446de6628a178ee4fbfeb279cdb3e73875cdecd4b5aa40b92c52. 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/QZGLS2463311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb657c75083827f71bd00f75c78553bbb48e24801633a50a54a3daa0aed3897. 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/QZGLS2463312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ac145366e1b1213471a1500a459994811a44be131bd2cc7123402728086b3b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZGLS2463314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1d686b0fd31f5792079a9f2c4a5ba7e9af5f6db24253a63c5ed46d280fdca6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZGLS2463315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef5be9bfe063dea67a727fa23345479527d8d6f224238b46e013edf68e78d8e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZGLS2463316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac948fa30ea555f4aec72ddca8ed8852a84e1e773550dca76a29798a6c118df. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGLS2463318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2c2b41453114e8842702bcf3f66be302afc76e1d7712996e5be3aa75c88c56. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZGLS2463319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfef1930e7261a786f7e866de39e73a4bc6006c658d47662c62392917133f18b. 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/QZGLS2463321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2ac58492faa9698f7281844aa6fbbcc87fa029ca60bc55a1d63e4e15f53c9c. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZGLS2463322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0e86293f442ca6698c829cb5e852a0c9a946952d6f2616452d891b5cfd85cd. 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/QZGLS2463323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5d45ba723333aaef96d750e26f88a7638ac1ccba17941f44c9917b3ad182f9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZGLS2463324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6fef6b5c36deb9bb718ceb09d93a03b69293b117d67085ff92c97f7a1bab78. 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/GXD7G2380248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77937479d2d8d984a71af4612c6cefc3b520edadd6eeaa41bbbfbd078b33d8e6. 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/GXBAV2591585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293dd9f2dab0e657dbbcbfe08ede2c596966e265e4965da13787e0c2b08251fc. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T12:59:33Z), 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/GXBAV2538327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72055ec142e4e7bfcbd2dc8151a7c99838e409acf1082ce96c38c71d0d174ec8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZTRX2589698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27ccb4316f23ee6ac9491af15707404d331a4fd5f7e86a27ccc51d73b382085. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWDE2555452.