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 0xd0a7df1b2ad4999a43355d1dc76b7b782ef255c65cf86ab61cc478be7c2a376b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f268b26-b4d8-439e-b6f2-9a6dcb89696b.json and https://artists.proofprofile.net/proofs/artist/7f268b26-b4d8-439e-b6f2-9a6dcb89696b.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 0x0cf4d2d912d89d9c07e9c03c7117cecc8fe7e564f261b818ee23cd4054ae54c1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QMFMG1561167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e40a232a4d96116634532d26d63f1956355e504981b84af8890a65431d82ef. 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/QMFMG1561170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f74e603210d105df4521f42a2922d13cbc3ff7526b1168529682e87dde0411. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QMFMG1561173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30820a44d710e0a15bf1863af3196157ee430e1c82778c8d6937f2c43a2f2587. 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/QMFMG1561176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e4515a5568e7c8f6adfb61d214af7b7b597d5c651418f10c6f65584d4a9947. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:51Z), 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/QMFMG1561147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ea0e8fd6fe0f76e06919d7c339f11ca89be437d1b83252b100f6f67f70449a. 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/QMFMG1561151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eee96300571acb8bef54e828ae9de7bfecbaf7c4266b2fb8c227fea7dbc1d81. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMFMG1561153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908903d7f6ab28c2a5b98b1d0782c60bf2fa73a8b60ec4605c4637625c8885a7. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QMFME1561538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3ed8c371df4c653a3ead19c0d22e134d38b18fb9df9c044a82e658ee2fe2ff. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFME1565192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc0c6badb66bd8b06e80d079005fc71670873112d4f58b98321295c2a145215. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMFME1565195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdddcb709e580aa09d2a7d96e04d171f35cab83ac5daa9e5e9b49bcc8f1f588. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMFME1565196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4965db52c3d6f15505786034aee587ea364c92e267191475984098b5144e5e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMFME1565197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ad90f8cec9218b14c0dc1e63b86438ebc0bff62da35fb3399c5bf5df9c7bb2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMFME1568824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e856a38e05d6becfcc22f9638bf1c925ba1aae89f69c307b45158992023ba5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMFME1568828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bfaec9b997a3c73d88d3c863b65789ea4ade6655c60e1185c0a35d74e93e70. 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/QMFME1591480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3a55df499a1628eccc5a9e2be0009116b8b9b0cb3dd1b9df5d7269eb5196fc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:05Z), 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/QZ7361804319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5f5a3a01cdc0dc499ec645a01ef0b78239660ea9bf854b8274b7222fca27df. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMFMG1507021.