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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8df40a60995b4f17eb02a3a58e4c86083dba4cdddce38360aeffbb8b54b928. 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/22e08a66-1813-40bf-8aee-d45840d538f7.json and https://artists.proofprofile.net/proofs/artist/22e08a66-1813-40bf-8aee-d45840d538f7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62a939b6e09c841bb09de616d19c5729e2a7505917f7cfd220d00f5a092cd42. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/AUPZ21200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22420fa9344675b4983c42bae8f7eabcc7463409ac7c23f088895b1e20326959. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/AUPZ21200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a14989c08bd0144f3886b3cf5eb434ece6f29350b675ede18697ac7930fe8ed. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/AUPZ21200005.
Everyday's A Holiday On Christmas Island
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e443eaadb48d85727b5a39cc82b899be2c4f27b812d8d1e9749d2d5d5394fb7. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/AUPZ21200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed398b36239af1b608d25079bf9c24ff58ad44988ee64423c16cf878ccd26de. 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/AUPZ21200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc42f6551677bf5d8601909d12b31f9072ea893d4b5f04f6d29e7fa424137ae8. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/AUPZ21200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcdd6b8de4fe3f3927ada1a576206ca3e44db23c31d54ec81903b27838b8da3. 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/AUPZ21200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96679a4dc4cef3b089b0eab2dbec30b3a7531dedc3ffca658fff7d0bdb616100. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUPZ21200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1f573bef94363e9b184615bc2e8c046df554e557e7e78bb45952f8a9aab4fd. 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/AUPZ21200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f48bd0fd4253498a13847479fb096f51efa37e991a717ca3bfe9ea7aa331eb. 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/AUPZ21500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd55172d94c8453579fb147079c598cb42933dc9375dff29a1fa630cea031468. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUPZ21500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ae6831f842832981d1c5eadd28d62512add2f03f93c908f8afd37f795c8b82. 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/AUPZ21500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fff18a56417047cc81dad21b69b8d734a97dc5c35990b76474eb3c82c10608. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUPZ21500011.