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 0xe3004a8f1dcdd7c7e667c3e7b7bb12b09be3ad442b8f70ebb6dfb030a792923c. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc4e3352-ac16-4da9-a01f-cf1243163b33.json and https://artists.proofprofile.net/proofs/artist/bc4e3352-ac16-4da9-a01f-cf1243163b33.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 0x2633362f80bb7c83a2ae38a23949b991b201f2e8836be68e5a53abe9cfb08acc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNA2575915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66322a321b926205d872f08fcba9de719c17df3746e0211e09a58eb2bdb73d7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNA2575916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e70506f6687be52f21f26753b23e7832e860d9f6feb585f45d974b4c8822f4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHNA2575917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b8ca1f0d8dac3727fa7f1a7799b17fdb51a333e58ee1f9fa5bb1669667d8f2. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHNA2575918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448bc9015fb4438b8896e3ddaedc4b6ee32f0da8e9aacf4eaa0d423ec333c182. 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/QZHNA2575919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a71d766553376b7b2cab46a8bca7e95290ac8627d6dff79eea0b8c109b0c323. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNA2575920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0463dbac17a6d122c81906a76ef8b336ba40db85a3ee6a612918e80c9ded1fbd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNA2575922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82f8281cb8b091f16ae7d9d813f17671271c612e7a13382a3133aaf2c1f2d77. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNA2591219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df14ad8cebd80b1db27c94faaa8f50f4a8da04293a9f0889576d205a6cff95b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNA2591221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbd8e7a75eb5e140c646978bce97c95bc093495f21297a1bdd5841ff3d37b9f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZHNA2591222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba2fccd418c1cb60d869b65a3e17cc3ed18ec930386973a860691f1ad86a22. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHNA2591223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf5e8d13b1f0011d12ea49013d9c3fbc455ebb1064b32cd6e3d4df6ffb9c29b. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZHNA2591224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5ae539c2e8ed58c54ff8581e1256101b3108ab7e1bf477a6083e95a55f50cd. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZHNA2577422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0df0361b08f501abeb78969642da36d4a8b2be9283bd6a0b74177b975a6102e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZHNA2577424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e700f59c8b8643a7f48724e4b022d991415973a2506821bc942f390c53dba22. 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/QZHNA2577425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5eeca54be762a9bf6b28878b782bbae9d00038d83b464993e4707a9c13ea8d. 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/QZHNA2577426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fdfa5f81778edcf16acd1a60d2fcd2ee6db3c10dfd52430764891b89982eab. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHNA2577428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8760d09306cceee2ed517c1914b0f093c71f5459934bc6ce3a7ebc0612c0c3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHNA2577432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eae5f2988aba6556301e9e6ae6f01b89d9a125b68b9c5dc2d3551158d3f95c4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNA2577433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad230eed571ebed1590b2c1cb5d3b3c9707dde8cc89200acefe5bf398f80c301. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNA2577435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5730e3543d8ae5a45e7a0251ad57f5ee49422e86e94d04589b2da347287872b4. 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/QZHNA2577436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba064e9852a56edae99080a05956bcb30c87553197ef1f5ae349a8874deb0d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZHNA2577438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac64a127817761e77a84523b7c9920d6b1592eb05cf1ab996a65fc9cac866708. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZHNA2577439.