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 0x0da5e9ed34e0c9052eda1e3795be17d5e0de31fd88dd36356eedba0521306b55. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bd2eeea-6e4e-42b2-a2cd-96e1bca5b6a0.json and https://artists.proofprofile.net/proofs/artist/3bd2eeea-6e4e-42b2-a2cd-96e1bca5b6a0.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 0xab48fbbee6a11e7ef9e4618df184427f95c7096696182ed5582b47e47821828b. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QMEU32105363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85770ef89be75886029460cfbc307ffb6dadf1a99112b744860c931ff1b01f6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZXRN2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7524ce820da540f5fee9fbeaf1f276b3bcd0b615142308083db286c4d0fd26d. 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/QZXRN2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7524ce820da540f5fee9fbeaf1f276b3bcd0b615142308083db286c4d0fd26d. 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/QZXRN2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e23d880baec3d2f67158e8d049e836e49ac1b9392b2698b20edcf065d34ef4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:58Z), 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/QZXRN2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23061868fdacb94b05a9225f13455a8c0da238246859d929a4e15016abe2a2e8. 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/QZXRN2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe041fee9157c8ff3301709ee7f8e2bfa0f55e8368dded71c3c930cdc42a51781. 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/QZXRN2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f86173bab2a569abd041c5e9fadfbef5f83a725c9f1ae5a9b938b5071f11439. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZXRN2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a4886cf8b3f8d6bcad26cfb12efc7d9eae76de481b6036c520edc6d8e90b20. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:00Z), 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/QZXRN2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5846c24393fad930e96f8c55e7be4bfaac1d5c8cd52e8471c22bf608d3322ce2. 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/QZXRN2500009.