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 0xc8fce0f39ef3f7621305832db06fdb99bb65b6e31f84028dd907fbd979dd8013. 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/e06f9a26-d9a9-4933-8edf-0d76e28b59b2.json and https://artists.proofprofile.net/proofs/artist/e06f9a26-d9a9-4933-8edf-0d76e28b59b2.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 0xd7e0e693d2b07d095103491646743f633c8363feaf7d1c65296d1a834a50c5d9. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ZAG8M1600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc322ab8afd5b068aaac53f5876971d9eef435f320af1e7c8df9a0e2097a2c6f1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:16Z), 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/ZAG8M1800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8748cc901d05049e53301a92fa0a4d28b21ac2382514c9c68d6c129ccb6dc1. 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/ZAG8M1800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0879d1c7f3ee95a0adc05c1d8dd82272990c0f4623a93302365a84faa76c7a. 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/ZAG8M1800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cc40f77c178419b65d30605db5e9a22845b06d7167eac03f0f3577252771cd. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/US23A1501171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220ac5ddd04e91c20c903eef469c3eb29f4c4bcb27fd20f08d1c3dfec0075689. 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/DEXO21992077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae43f9528c9e3ae883971280f671d508e34b113a63bc2444bf2ebb82df269ca. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:25Z), 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/GBDLP1901102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453dbdb879896a6bf6906b593f1182c6a6693dc7b22d1a09464e2ad523b6c105. 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/ZAG8M1900265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adf7b58dc8209209622d174acf2bd5663eb5369118b66c7f51435481c383e2d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:11:31Z), 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/ZAG8M1900268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f55148cc54838b4251d93183e2004437d5af8db132a648b87160271add015. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:18:26Z), 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/GBKQU2034051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9718ac2ad7c66a360454c908d1c7c3adaf51696ca591c5370d5aa50474e39c5f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBZVM2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68a46bb3a175f7dfdcc79e747522503cbb12274b6775880af00a614db36d150. 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/CA5KR2189281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315800a3099e63368ce81e666d7d5dc4657005564c1f08f432c9c3e5cff6e8b9. 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/GBLV62104522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdda7be607098ffd3c823ae263112d2c4f38f4a99a0183753cf830d4e422536e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBLV62104523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2236ce36669677b582d5242237aa93bbe2e91b74b8a3edca1dc6da93d5fcf4. 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/DEY472273087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9141fa256da33f07aa297b1d3de783c4ce82fed8f5135e9d8b021cfc7832367. 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/DEY472273133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ae92e663426be0b98236a19f155f6e9f67af5fdc06cc84ac39c67e3934d81f. 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/DEY472273084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ec486777d51cfc327b20f363e214c8db94229258a6e9b6ba85aff4584276d2. 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/DEY472273085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b26d369ecd9f193a50eacc483132b6dcdbde6e1d8c35cca983503b99aacc862. 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/DEY472273086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e8ff7829a25f6828f36dcfed3ca818e6359f975621a30f14bc0be2ce256a8a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEY472273088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12972f3b9f36a57da7c1b00a0d4cc80c25ea7e2b6f82c39e044e785e52c126a1. 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/DEY472273091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e6653f098d5e3aa04b895277da321ea65f4e9072610baba0626455c8ed5b9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEY472372807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091896a2a7975cad22359f29c20131a3e57258838ffc6a2b503078515f4bf218. 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/DEY472372808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852ec840ef467b1f1fc0a4a10022054066be077d5e5552ef7dc71b48642af2ac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEY472372805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc6be958bb9c2d31d8a979e2b7e24ecf267030a19131cfecc48a34b4eb5f223. 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/DEY472372806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500828bc9c1ee62640b3d2f5218decac14f59d57a85a2a7956e6b28f8d949806. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEY472379166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090d7313b388b099611bb67c605a7ee90cbd92554759938ee6b3b1558740cf28. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DEY472473392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfebad9a73649a6086fe399dcfbedfeb584fc2a061292e1f61d6d6805490098. 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/DEY472473389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a29b08743a2743e7186bbadf88a22ef1ddc9211421d60072fe330c3aed843d3. 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/DEY472473390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cbd783bb96a59473d1ea53799f62ca1d6cc5861c0853508ab3c29bb7d23f27. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:56Z), 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/DEY472473391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c5287b6ca82806203b0a9173ed621a2fb9a73232efb82c2f426f2d3ddfc94. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/DEY472473395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ac318c95c19eae078f8dc62a5541d6f6b3fd3feb6d9a021305c5ab04d450e1. 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/DEY472479172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf74199955e5f9175966064755f698f9f645f7b06e98dbda00f982c8f5d352d. 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/DEY472479171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ac318c95c19eae078f8dc62a5541d6f6b3fd3feb6d9a021305c5ab04d450e1. 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/DEY472479172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc156db7c76e9e43fa2c50f0b4a0ca959f7109beb54a9b6f668502f7bef63b42. 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/DEY472479173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d466b4f5eb160df21caee381784d17c69e8e131016a85506a5b2ef8a5b1194a. 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/ZATS32100007.