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 0x18c63d6484127d7a7d5a536e1d3e73209f811de194f0240063ac63bc1b124d41. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5eb5690-cd67-486a-8dc0-609b699af6e5.json and https://artists.proofprofile.net/proofs/artist/d5eb5690-cd67-486a-8dc0-609b699af6e5.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 0x519e60bd5960cb01e185194bef811929aaa200050fabf0d6ccbc8c2f76e4aa24. 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/QM3DF2255290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70123153eacec62a3dfe96b8059aad1314bc37d72290ace110fad3d1874f48e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FR9W12236184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e2e51d37ecb133b63e8f6181be71e0defb79000c3f9f82b034235d5f139972. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR9W12236191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680fb72bb948930ab6f03fb9493c9c75e7f53f62abff3b2428fc04202403c0c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR9W12236185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f05425176f337a9d75c632a1dfa9e3838e0af3c3d38d91f7536fa47b4a82c11. 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/UKZGC2406614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcc6b3b72f88a580d93abfc9748aa8d18c7c1764ac0d182c6a90e269ab58ce8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/UKZGC2406615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9746ee5d1a1d928d6ff174d8bdf2ceac94706a8d5ef4d1d986d182bee2d855e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2489146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6c02d221dbeb9edf7b187f44fbfa1c1de7e03aa2a435c01e917426575ad4a1. 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/QZPEW2451265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42f42216ec69d3b1cb75fcd32ea157ab8610c68a3a0aff1bab1e8c2474ba749. 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/QZPEW2451264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae4a1e111ff3691e903af241a4420615470ff00841de56cc3a8bc882954f49. 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/QZPEW2451263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324673fcd05aad198e8a7ac438d315932bbdab30d6bce707da3715ac2dcdff41. 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/US3DF2454075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6473c3fde728aa2f87d05d23de0d81526e910b0b32a1550e04afd72c922e9be. 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/UKZGC2402854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeedc74f34706d796a764328037f5b04244f0e9965fe9291b6ae5e0afc186428. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKZGC2402855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8885ddfac755f54701f014d59692db5d215cb6550b8f5dfa7f10ea21e4d6930. 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/UKZGC2402856.
everything remains the same - slowed + reverb
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b0e5d17f136ac35ff45b9fd197c171fac53ff0df4ed1aa320e5badb7d0e25f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKZGC2402857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979838942a86c2061893717fb483af67e0fef5fab2f4e591cd7a6023748c9a93. 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/CH7812371803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6c67a322127869689097f966ff41cedd368551046b4b7e9c739497c4ffbe66. 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/QZTAY2389419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04429e616ca3a2c63cae58106cead3de5337e4a0c76ba97f526fb71cf2702e82. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2281520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066267e06dcf7a99e6787aa773460ec98057e9fd77529d4f7a4656e4d6c08024. 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/QM3DF2201053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f40aa633849367cf1465df96e07b15c4721ac005eb8183f88c135294e0018. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR9W12309391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60ceeff710c07b9349360c63a9227b04f4d3418ef075ce68521bca491fc1a38. 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/QZDA82371095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34265e4f92d6099ebd0c197c48b501eccfe56dd4cac5e7bcde448a66ffac044. 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/QZDA82376140.