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 0x4e799f91a04756403ce6c50a0c6935d3f0bde9ba06f0d72a2c269e6b748277e0. 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/bdbf377c-0cc1-4757-91da-91e289d5c1cf.json and https://artists.proofprofile.net/proofs/artist/bdbf377c-0cc1-4757-91da-91e289d5c1cf.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 0xef9d76b5f6cbf64ee6f24738fce4e7114da6862a655371695d08bda43c06ef7b. 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/QZES61914703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2427f860ce0187825b0a747b35e86f3cb4fefab3fc83787a5fcea7a7a75d3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZES71941102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd85b4b8f570b085650a4f637aaf2ab4f5ccb346176bb27f938befb670568b1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZHNC1952787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaff38d8e1225e466b8faec7fab4ca45243e9ed7ffa46e998d3e6464b28648ba. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNC1952788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eae1d4618bbfc255acb0b7a6b82bacbed5701287797d485f6e8685118e6de69. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZHNC1952789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf466083d2c7eb80b7284461d97b8c0bc417d6bbcd9896717c88c8e1aa9368c50. 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/QZHNC1952791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7994fa166d5986e5306773971deb12f0ce73b1a6ffad737ded5633d555aae23. 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/QZHNC1952792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19102853cd391f3f265b77c89eece7ca380e099d4906e64053a9c426aa549cd6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHNC1952793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383fe4b5b7214e0ccde946dc9b2f8b4a15182851e075b6f99913cb322e85797e. 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/QZHNC1952794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ee9cba5f6120bd44c8c2ec30e98c4ac42b4d6e6d045d966155d1a6c1642d68. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZK6P1942783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a1d9b5529a7271cf8a0b385372d60a4a506e8365eb22c11bccbc4859d2aca5. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZK6P1942785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd69cd39743ab7f95f0f05a8866c9524f3257960a857de470fabf0db64d2a96. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZFZ72006137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2849930629b645d705b091408b27bf6ea3b82ca330fc67d4f0383e343fcfdd. 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/QZFZ72006138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75006571fd197039b9a6a1fce75c99a17e947ebcde800b9a1a03e98ea635ef5d. 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/QZFZ72006139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1165d2316938c536e48b905a39d6bf767048e73a0ca102fc21a5e192faa7cbd5. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZFZ72006140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8801440d99af4a2fa48a9e1e3a572bd049bf79744dd173b91d505e5a9fca4b72. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ72006143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fe7100945e838333875a75f6d399c07a95a4a6db1480793dd60b629ffa092f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZES72026977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf915d8ff2c6124d7d779bc00176eb7981d10f2b4c1bb5a4fc6b40169e552520. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZES72026978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa188bb7d5790ce50bdc6ba3de3fd279ac07bcc7ea9b3af2addc150ec71d66. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZES72026980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1687143b8a8ceb2328e201fad482651ce2919b3471d98783322088d991d0de80. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES72026982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a7a6e4cf9efd22d4d9f15d59064f5a43507277f0153ccd81335a8dd598e7c2. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAEX2022949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8836ff035cb24d62ae25ed53f8ba703abf639e55cd5ffb9edca43e5fa68fca4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHNC2080579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ee9cba5f6120bd44c8c2ec30e98c4ac42b4d6e6d045d966155d1a6c1642d68. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZK6P1942783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a1d9b5529a7271cf8a0b385372d60a4a506e8365eb22c11bccbc4859d2aca5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZK6P1942785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93612980d1c6a885323110905be54326468f14bf3ea1d785ffdc802d48ffe8d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZPLR2032925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f3c8be9296ff617d8b58c5073484dac7f90b29afc5dbea864b4a615445c959. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZPLR2032927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d35c7308dab940ce6bf04effaa654468362fa3c237021a7662657cf52f7edba. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZPLR2032929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d52dc3e6224fafc68aee81c0bc7dc020229e47251aefa85fe45ddfcd0f24dad. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZPLR2032930.