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 0xc6e92a39fab769b54d7a1fed2fe89f3b2aaea671c34a4a9518740c0843f6bac8. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/129b2727-d565-4568-aa89-07a0b130e819.json and https://artists.proofprofile.net/proofs/artist/129b2727-d565-4568-aa89-07a0b130e819.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 0xdbe7893d4421a39eeeaa6574e4faf6ef08ae5a79350dc24ea612e7e72f4445f6. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USA2P2459347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08e874e23e32f5ec8517d32a27242ae1814990b600565f0d2cff07a6c6442d1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USA2P2464422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe3f872bf812206c0f68ded599e6f9f9333c47d018bda0f4b57f36df8538c2b. 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/USA2P2467385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01384f49356713a6d47118136445aac82e2e8d19b0f74943a1da991c3a48994e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2P2470331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a043887352d4844da591f5d0b20f5319ec15c62783ebf86b07c2bfca031e21f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USA2P2470334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31be9e46f102d3d857d888a07e32adf665344113111c82f2ae5df76676bd8196. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USA2P2470330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01384f49356713a6d47118136445aac82e2e8d19b0f74943a1da991c3a48994e. 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/USA2P2470331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd6ee25146d0735e02567c27e31200b412512bd0e3d9ceb84b3868f2126113. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/USA2P2470332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769c5af00ad1523b04bf96a0da174b15d1cb88fa065bf2da86aa6b60ed0489dc. 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/USA2P2470333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a043887352d4844da591f5d0b20f5319ec15c62783ebf86b07c2bfca031e21f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USA2P2470334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c50e3096c04a180f5077fea7234f9771473c9a732bf88d9fc1db9be1b82f02a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USA2P2470336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6606fc2c86326ca946cfd77118d79aeb10d84745bb3159ae02f7bef0d8c18f1. 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/USA2P2470338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5335b9e08a3b8320f6daedb3b89dd6cce18e730d3f7de6680640216aaf2c92f. 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/USA2P2470339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2717fcf6e99690940368fa4032c208018b064a9ccc55cfaa08c42b1c87d94cb8. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/USA2P2470340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bfe02445246597aade915cbc84573f620f7e70605fd252150e9527edb73fb8. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USA2P2470341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efa244c1d379cc8e1eb41819bcafce09d9f9f6276988196474b97a9de2e2b72. 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/USA2P2501767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce7293e5ba34144084e4a0c29f5ee0d995470422f091de80a8a38e8ca320b54. 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/USA2P2508469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bac2d8ee4c93d73db86a135ba8dfe897348839e01db70bf4ffa10081aef96c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USA2P2510802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ea4b2883a32c3888101d719d6aa30f8e85ff550bed5ca223bf22c70f4cdda. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P2517574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bbed1c6b5c88c2c71f705451b150734b1e1aadd96e68eae48091451a982c98. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USA2P2509654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9878a30d0a73fc0bb1e7a2f399a9cb9d5f0b4548d45ce8364f197a434826a1. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USA2P2508470.