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 0x8f390bd64cd5c188906d0c2e03aac8a77db1f49edf0c5adbbae4d6c2d6b2355a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d47154a-15bf-4b74-a09a-92b60a9619e1.json and https://artists.proofprofile.net/proofs/artist/2d47154a-15bf-4b74-a09a-92b60a9619e1.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 0x34cd9eed74f1d8f86d31c19f325f7e20137dfc4b7ee2d196e5eac39a86ac6b5c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QMRTJ1900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bc5f4a7a50f69e2ba56b143eaff7312661f1cfdda0e4433ad8efaafe67b6f9. 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/QMRTJ1900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3ac48cf6fa270e7d5c25f821cecdc5aff6955b2b2ae9d81b77266e59ac5002. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHZ42125557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc402814330a18c86d655c9ed36c43afce606e64adffe23f4305ffc531692c379. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZW9M2258827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7652e6633120d1b486d37b4d29ec6013ce7c4ee1572d5d94ec2c5f640028e8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:20Z), 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/QZ5FN2534846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566d3735b3bf9632fcee540770c7170b0362050f4c0ca0f742043b2a9a6efb64. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:45:50Z), 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/QZ5FN2534863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c7254ba98c9140474f5e3ecf6068dd5306d5bde59416b672f0607ccc92f163. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZ5FN2534866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438be4077ec49e917efc6a0bd5b80058c231781bbd6a55911a8a448f00787bd4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:47:03Z), 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/QZ5FN2534868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af1c33ca3cd85fe6f67e9642413f30cbc68d2faee5ba488189334d7ceb6262b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBRKQ2101097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c136ce06da299ac72119655b960adae8030d3c1067e986895e2a9639b08c74. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2072433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d4a442d726511103f0c057705e7c7a29d1932c56b46861f8539abe3583468c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUYG1288332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f6fff46636d5ec4d054a613b39cbe7fda6c92c06f4076feeaecd243f76659b. 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/GBRKQ2349684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f8de7bcb475e8572b3276c09073f92311d47dc26b85c5c2fca08f2207c0f7a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9K2257972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad05d3d1bc5186c24bb90770e4eee4a4afc14aed1af9c9400a59de4fc0c58f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMZ92070612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe317f478a1047c94e6a02fa47a2cc13735be6177f7adb48007d0f107fe956a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZEC2322450.
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 0x06f49b7b5769aec1a4676cee13d89534e140c074299bea67cbcb96b6389bc1af. 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/USUYG1287994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf562ffa35115e51061761747de7a2e17b6a3877fa69eda56f231222c2ec9bb2c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBRKQ2349680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da285106e03c01db288817c0096ef8f098c16b8aad6340491e5ba25c0866966. 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/QZMZ92094648.