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 0xef15050bc648fa54c3c54c3809b46d8703e7d002772afccfd8edc29c0d1c46e1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b9307c9-6bd5-4bbb-9835-9542dd6d1e2b.json and https://artists.proofprofile.net/proofs/artist/1b9307c9-6bd5-4bbb-9835-9542dd6d1e2b.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 0xca1a65099c14d7a7d58338fb3be48e705db2e3cfd0b25dda6ce34b422e262a4d. 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/QZES72263591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fe11b510c23cf3ec0af5a9a30dec6b2253e29118791b030e50400ab084ba28. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZTAU2266523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db017889d91a7f053445b5916635b0b9a85f3c0a6cd567fe0dd1813bbfa39ce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ32395954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d82a38b594f2c1bbb2587d754d47212ad806e71919fd03b84c619bf46d2da9. 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/QZTAU2361232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe15409975be850c6bfb5ed93d681cb7adb2ce764288567d775cbdcf3b6181d7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTAY2324307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88aa897a6d76f813251ded131e4c0eaac3c96f9b1f3cf804d82b9bfdc2bebc0. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:26Z), 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/QZDA82459987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44321d5c5580daf1c893a16dde936ae53f59cb245c4c9cc41447e9c21ce15e79. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2447244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76a76e04d7709f60b56ae95a8764ded20602d60d1c3887e8decdf311c743314. 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/QZWFK2440800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91439790fb0f33bad31933b2467c0864797f91f5b7392857a9747d01f4c111c7. 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/QZWFT2588644.