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 0xd096a6f469619bc5022b99f7981fd0badc50daa01db06ce91551d0d2f727620b. 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/88be0b08-69ce-4450-a0bd-bfa83c024f11.json and https://artists.proofprofile.net/proofs/artist/88be0b08-69ce-4450-a0bd-bfa83c024f11.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 0x87d6ef5a314236f2719ed9b426bec22de6aa0dfc3fb9efc4c104d56eaa37c6e8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QMPU51736911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef46ce5e88d67d3b691e75900fa6fc56014e77c5135173397f20767c6bdbcb2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:39Z), 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/QMPU51736920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ded888e21eece0fd72197477068e6d346a7d58d8b965cfc7cd3abf262f2ecf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMPU51736913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e650d1d4fc905bb3d7ac04a2b24f5d41f834503358cff987bff3e34407e218. 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/QMPU51736996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf57a5b38a59c0c278d3ec93acbee878b12f99b43e66b91ff187674577c9441f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UABM11900703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3516a64a47d50b2eed0227aad0d9e6b34e296c5b1ccbad4965076e359d1d28. 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/UABM11900625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ec841a738172ccbf2f8565119f34c473b5a6205efd0942f83b334ce30fb8e7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UABM11900719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9adf248b7a0b4ff5b88462cea1774552f44875e7608eaed618f1f55799da7a. 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/UADZ32110011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9755be02bac4af0afeeeab18223310e12ae11f2646cad930feb14dd2bc3e214. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:37:28Z), 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/QM4TW2461090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ddec22477b06833abc7cc88dde30f5e5823a233e5af021a7b2db2f50308d5d. 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/QM6MZ2416637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9773a4592149b3a298fbd11f4296308ec9b2c50afe19123fb7bda6ff4b3ba11c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMDA62495904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62a624d70c1aaa207a8f64a871e999a776bc242ef7737095a1bd1ee31976473. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMDA62475807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c2923d1f8495fcc90e1a73fbffdc318cc983ce08f3c9fa860992d5b4b0fdf7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMFMF2503727.