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 0x1893387ab19549a2589abda403f278a65dd5b1d590a30a8607daf785b091ec3b. 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/a0e659a0-5340-44dd-9533-02623e78e439.json and https://artists.proofprofile.net/proofs/artist/a0e659a0-5340-44dd-9533-02623e78e439.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 0xe9853b3210fd50449ee2a95cc861a49220bc80aa4ebeafcc4430764959083945. 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/BRBMG8400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88695a81378311ee94d7659700a338cdd271963096cba34a0dbf60401e5d1980. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BRBMG1701270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf961192a4d7bd858ae0644a44e5501ef73853dbcf9214a46f4406f2a3111c321. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BRBMG1701271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1065f12c225b66d42978c141d1d8a5e9f63d891ff66757e68475e1b477196b. 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/BRBMG8700179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36c0c14c56a3b3a81a2e54d785a4c6a241baeaf5a83a1ebf1ea5b18a0dc891a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:40Z), 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/BRBMG1701223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32a2342f0845393b8d8c5529068dd2a9283e79b38d99a8e1319197f1932631a. 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/BRBMG1701241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a7744822cf935df4b1d7dcf0cde6352d2ddaea8c4b8033ab502662a8fec5b4. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:14Z), 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/BRBMG8900637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b8712a358246e847865256da170c9fd1e29b82186aba9ca12e87931044d967. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BRBMG1701233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cb15ddff7bb035715ae19239d95966e6aac90039c5c1fe2f4b6dc65f6464c5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BRBMG1701234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9be58a56ad12cf0f665aab75e0f8bd51ae55af90c30d62b810e975445fb837. 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/BRBMG1701235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1b2b65afba61e96f0f4819eb1a77ec2834a11b6be87c623706095920be4466. 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/BRBMG9006046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ef08603b8cc6373b5e9f07453034694430184d105ace97df1358b24080eedb. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/BRBMG9103653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38385aec804409a9a7c665072cd8034407677d2fe54fa1a10a118dc27f323b63. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BRBMG1701264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f38527a9c062340ae5ba3ec3d11789eb7847882982e4afe09a29c9cbc1c6446. 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/BRMAX2100730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f0ba54ada8ac4027b173ed8891e6510f7d04e60c15971dcb7d02a1584fbf23. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:10:50Z), 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/BRBMG8600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c173653e8ffc0e645738902d2e00da642f290372815efd0161e36c65f24650. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/BRBMG9103652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f0ba54ada8ac4027b173ed8891e6510f7d04e60c15971dcb7d02a1584fbf23. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BRBMG8600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdabe3576a75227fba799cf7ae1abed3f93ad5fdc0ab62e0a65dda13c1e661e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BRBMG8900638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679821f0e2b09500fbe4d7c800f2e2f49e8687430776e67b5da635a05115a08. 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/BRBMG8700177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd033f2a695026663dfb288472703baf4556a88090a551f060443439d488404. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:29:24Z), 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/BRDI71300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93445a3b07ee4121085f4b2a6cea1b180ccec2ea827e6b389dd6415db95ef4e4. 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/BRDI71300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc537a9d486d4356e9c929cd59ac35a3fefa2a2018bf73ab4d5cccfcd672a6cb1. 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/BRDI71300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1240de2fe756d2d91c928b954915cf983003acc33c1d86fe8b15100e6657d. 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/FR10S1806573.