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 0xcc86cef04b8e93c6190bec207c1521abb598610648a1b9bad47d49a6bc027838. 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/ebb3b435-f1c9-4345-928b-6945ced4f7f9.json and https://artists.proofprofile.net/proofs/artist/ebb3b435-f1c9-4345-928b-6945ced4f7f9.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 0x1be0b5071477e91e74279804527da11485d91111e4df2a36d311705adf9b8c79. 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/QZDA52031086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fb7ad71251c93ab6b375da6d861682a05357bf0bfe4aaabc822c9c90f11d0d. 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/QZFYZ2137312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d82a23c43bdc14d45f856445d05fed8cc72c6533c0f9473cdeb2cfbb8073d24. 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/QZDA42537880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c1d27d299d6891804553eac890fcfed16042d5bf3db1068807ef977ffe6c5a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42537881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b65704c0540ea1eb836f895c680190d34a7363fc5c9fd3b4b612d29ba41a8e8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA42537882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b7ba52ed5d5474ef45d5e6ec185658464ebff6b2bcb6db631198bf548f74cc. 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/QZDA42537883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd43b1fdce89ffb888676bd96b5b2101be5bed732cc1aa2f3ff13cd0bebeb755. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:17Z), 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/QZDA42537884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e779d6fef335b47554b53dea21a3c0d59c0eddc386ceb7a3831cb1cd8e3303. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:21:25Z), 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/QZFZ62008659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4068823582e03dd732efcb452410906571792c9738a73b46f8183a9647c6437. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZDA42537885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb25d8460efd22acbaf7f0a592756e12aaa35001eb26cd744e591c9417f620b6. 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/QZNWZ2072647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390de76f50f265482f12932b24e0b0e711b26ac3997cd79f2ecb70a5283e2c79. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZDA42537886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cabc47d1f3f0529af1464eab722723bfb7641814784ba5797d20ca2001cc86a. 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/QZDA42537887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d04b6000fa7ab5dda9dfe000bdfcc0540b09c93ecdf9f9b1ccf3f768d6af06. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA42537890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90a0dfeffd694f1e7853e774a1d4ab9087df62b75c82c350441631f07bb48ed. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA42537891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fb7ad71251c93ab6b375da6d861682a05357bf0bfe4aaabc822c9c90f11d0d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYZ2137312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a793bebbccb40273772c99e233bfc8ca5737b2fa8673fae9f70d4b4d04ecfcf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA42537892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf731d10fd6d9eafffcf2b1685ebb83101e80360474413f2334bcfb1e1e933b0e. 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/QZDA42537894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2adb96f6283e79ea7686e70788cf5e07a5201faef20ad90b1d209d920453c0e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOAPI1598378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34fc6f762550dcb98744d4e36eb564f67cd21acb37b7d3adc555fc71857733c. 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/QZFZ61979388.