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 0x1eab5b4cc27a17071179547d5193a1f865cfcca043fcf8fc01d6b41b309b616b. 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/bd149127-6326-4472-9654-8c4f11b5bd85.json and https://artists.proofprofile.net/proofs/artist/bd149127-6326-4472-9654-8c4f11b5bd85.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 0x9a4e323c55af176c8088fca2bd78c881b642d517445c74fb6b4bd67e8ce88362. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:04Z), 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/ES71G1637922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5da29056e5b5d25b5e15fe30775b328c6f8c466adf18668a0a2c6562a227eb5. 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/ES71G1637926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e45a062b724c8d2c08422c13534da2508815425009649756695f02adb5b3a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:18Z), 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/ES71G1637927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9e62a4e57bd78b5f00d33f8766e1b0d854b2a8013878ecacd1ecfd32c34d8b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ES71G1723222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b62c5da8385d7397beb999d5ad10ca889114b6de8331b45909fd350d2189688. 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/ES71G1818039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30352be4c8d53035b91b29942bd3989570fcba3b03edc54495a522ecdc07bcf1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ES71G1881680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fcc31702cb499189debae4d08d20b611e360ffa04a1d786a2095c927a7a70e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ES71G1881681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe947603df5dd06451136f5bc22ed01b687f32bf48ec402565dfa9892a6e7faf0. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ES71G1881682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f001cee43eaf87ed7cb3e10af7113bb93e89f13d3af431623fd44bd5ec9d3d3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES71G1881684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0232d6aa8c2ac42709ba330cf5117b8ff38bcae9848554e4e285a3e0bc962602. 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/ES71G1881686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac87e162edc509e0748d432892ccace4c8dba4d01bee987cc8c2a4ee65f43b2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6N22057153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80842d9823315e6df90eadda400c3f219df5c2437d7dfa8aaa4ba200cae7ef4e. 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/QMFME2009486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7187d7d1ae62b895d9c0b0a24230f308b6d160f3125383177c5447eab4dbd3e. 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/QMFME2151096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d5d0a81ee0e21bbc4b34411cd95de49cbf4117184f4282078ef8884fd4b5f4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMDA62148250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc5ca35ae2163ab2789845b452c08b42bfea5438b6040bd8206e0ecd02aedd8. 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/ES71G1934926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7187d7d1ae62b895d9c0b0a24230f308b6d160f3125383177c5447eab4dbd3e. 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/QMFME2151096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d5d0a81ee0e21bbc4b34411cd95de49cbf4117184f4282078ef8884fd4b5f4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:50Z), 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/QMDA62148250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5579fc6091e6ca5713936ae577e5f6417ec2c46dbccb463efcc286668c8c0ae6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMDA72137266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d2d7c8d229178057dbaf7f47dbb599a093946d6e25d439f682462aa39c8de1. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QMFME1900351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80842d9823315e6df90eadda400c3f219df5c2437d7dfa8aaa4ba200cae7ef4e. 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/QMFME2009486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365c25c919a52b3d5de36fff8d9423a25e986c67c9c5bfdf4c877e862b133ff0. 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/QM4TW2365294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffdc4c51b933067be307e8a6c8ed1ee7520b232fcbdf4ae124fae80471002eb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QMDA72268965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1293fdb68e20b919a4d08923ab2851ba40260d0b08a549ff0b55c2ede328ebf. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:48:46Z), 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/QMDA62207483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3868bf2f3dcd0a6b35eb0a37565948e3cb8771e5daa21965b8e5d246ebaea9. 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/QM4TW2365296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffdc4c51b933067be307e8a6c8ed1ee7520b232fcbdf4ae124fae80471002eb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMDA72268965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b15176fcf35658c2d9e6807aeee9db6fed8d9475cdafeb008f73c59af16b47. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM6N22431714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e0cb213216cd1f2aace9705642c5d9787e0f1db39aa5612a30c88d2f24f93b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42523791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe086088a8d916252a32343995f79034c0dc99833c231a8314c8d8a993ff2bf8. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QMFME2511619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6274a15802d045f44555da7075638cc8f3bb98266c7fb0bb1172afaf2578a9a5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:58Z), 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/QMFME2511620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448cdddc853bb1c58424bbf953357f96da2b76f01315d5cafacbd693c24345a5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QMFME2511622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf7047728fa101c11deafd8ea406b29bbc6cc21762f9dd2f16e0b608f4413cc. 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/QM6MZ2079687.