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 0xf327b93d93839230e6570d173d82d4535ac6afef5de76c63436c17053f7b78df. 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/05d63503-2882-4967-b1ab-37b685e1a5ff.json and https://artists.proofprofile.net/proofs/artist/05d63503-2882-4967-b1ab-37b685e1a5ff.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 0x1a53b34dc9630a0d7cf067e243c3a5f4d0aafbd6911456c7a970b53ec07ce7aa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281472959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6361debeeba8f174b67c00fdedd91838403d2db5ff6a7049d079ffbe68b96bad. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:04:10Z), 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/QM7281472960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabe743ea3c8c9d4b25ec5384622201dfb270da4df9c1af3852de2f311425ff2. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QM7281472962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10fc2273edad384b184de1b6d2ffce935b56db0faa983bbfa2da466471594de. 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/QM7281472964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbc2c4beadef43080d36926d390f481a0da85c77fa573cf0f7edb3e220e90b8. 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/QM7281472965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98375254e29c3fcef94ac62563023350bd908dac1a37e52d304560d70a243669. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QM7281472966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a05861242e102a5d727159994d658b1730baefce458956eff515e6d6d288e03. 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/QM7281472967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3814411734a528191cebe8b00f9835c1247d8f3753da686b690b5082e348d93. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM7281472968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951382194b1e9c4ded467bd21e51db4bf5cf3fbaa885424f9ded4134cd9a97b0. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QM7281472969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0123667b7015c4f1388ea82ac3fa5e0d575e8c7bdaec5b9e0eea296c636b7490. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM7281472970.