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 0x0f9026eb1c399e3cf446af99a9bfa393a515063105f45f7cd6128fb25767b3be. 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/3053fefb-6c96-4c8f-a465-7d0bcccc9a9f.json and https://artists.proofprofile.net/proofs/artist/3053fefb-6c96-4c8f-a465-7d0bcccc9a9f.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 0xd65156a8e20578b4c2a50337ed3dadd4844c69b6fea562ac61c03d1b415c2bb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20192db1db2fb2723b748f95672afd0e45a13c3df7184335b4539b41535b8040. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3cde274db72f59317d0a43c25c41f9ececd741268ca2de293b313793bcc15. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed8c5b11f4f902ec8292d171fadb03affaa3038bacffe0f452642e49dd91f4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccde845d0c3b6153659dd754efe4c31d75a6ee2ad17176f5273cd9286d0f6ec8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9M2434126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cd5b646c2a0b005943d67838beee50635c35426c86b24a2116c03599378798. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aa5e8446881aa235172b30b73d9ae12c62b9aa6c3f99659962e1e8ecc9acf1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c785bd9e92124267efe929b0f08ad5a99988c278ebd903b9585377d00d0e78f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf422686501251a18982312e8a6e48aaf754ef21f7b1ae339a20bc1bda642af4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce3d69100fcca08e3ce57301ad747a56dc326996a5208863db078e27ff09179. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b29c4aed91afe46fc3b8b4cafdeae3f794a5edb84e00ba90f327c84e7fd136f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238787c29a5b836e5d6a2525f318aea591442e83250e8d6d6afeb157c66461c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2578262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa099ec799ee2e10cbdf5ce6cfa31532a33c8e6d13faed57fcd98baddbfa12620. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2596784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fe352ade5432dcc10e8e3ec1b1459a81cd38163e750f58fabcc8c3cccc2161. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1756458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211e8283825d7b6dfcc8667de8497af3c2dc563df6ae4bfd2b34b5a51be63097. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM21941834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e952f3b926e37dcba4cce33065a212ea88d3991096d6c7105f91e5bfae0451. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USX9P2065571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b11a0d66fc14db4d3b4871c8b4591425844433bab8db00c1a4c3aba9ebe355. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USX9P2065572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774bc0270b64f53896631dab27243572b99f670bd93e9a3e298040d6bcf2154. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:53:34Z), 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/USX9P2065573.