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 0x8839ff56a50d30e492993a79924690046b37c4529bf83ef111cf29c5e8c27397. 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/52c7a67e-f0d9-46d5-be58-831cd0b0492b.json and https://artists.proofprofile.net/proofs/artist/52c7a67e-f0d9-46d5-be58-831cd0b0492b.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 0xf2366dc442a324a1e77bd3b2a4342e6c4dbb1b05e235a0043b3d4b0d862ba62e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZFYZ1917524.
How Could You Do This to Me/Why Would You Do This to Me?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133beab138613e55a72e6a04de1e980dfe0d3d69987d3b22a31af761ee406cd4. 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/QZHN72056779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca01e63f45901dc03229dcec3f9610f79d738f208a44512a69fc32a109e16677. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHN72128359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd3d8354249de31bcb1e1d177176dd32d0a717ee95a2472fbd04357e7e2d4c4. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6Q2157333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c50fa7ce0f0da3d22a2be8fc812faa64029c92de20b53a0b873cd06b506955. 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/QZK6Q2157334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea356a10f6e4faf8df3986e15f8dba0806e8362effe8d8a004f5e6c4b1d8aefe. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USBQU2300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c70b6d72df8384eb31aa285274adf13bcc4055bbdb51edeb404a8e6d765bb91. 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/USBQU2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1947d235120206f6434a4b77fbbc93a467a7de60457ff38ec8cce2a475ac20. 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/USBQU2300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd4286a3d4d41baaf91a4e1914130568b3e287b45da2fc019d52637947be0b4. 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/USBQU2300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd74d8aa29dc65fbcc4b80d7820d9f57402b6d403d795709103f8ea3ded94b33. 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/USBQU2300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e6cba064b0a223fe287999f74f384d3e86dc9685eb37b44c9277912e4358d7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USBQU2300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f25ea95eaf07b2d37d494e2993cc9c2418d95af7e18ae47bcde8935a66f907. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USBQU2300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d78d9963953c27d3e263e0e78c9338b9c5ae23db2bc494ddf2a1da57922d13d. 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/USBQU2300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6362717555739498a2f3aa8e4df6bd4f1f2bd394efa855343183a0ef46af5985. 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/USBQU2300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf2f9821d0a73da02b378ff63d67fdf2f903ee433ce2de6ba5733b0d93aae99. Chain 2 (Bitcoin): anchored in block 957842 (2026-07-13T10:08:30Z), 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/USBQU2300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d4ea3b805978c444649fb285793ca040e367df2db6742e424b365921c0059d. 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/USBQU2300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc566bc249346b1682df989be980fd1f771205a40bc018a60f38c8b720321a87d. 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/USBQU2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6e6f5bd73bd75a8fa1a82b41e8e7600c61821a89b0f7ed12416e2445df0051. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USBQU2500195.