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 0x9a4ddad8e5312cb96b9811766947533176b9d553d5a995b3abad05c59dbb816e. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac0618ef-3b37-403a-be56-8bc662da8036.json and https://artists.proofprofile.net/proofs/artist/ac0618ef-3b37-403a-be56-8bc662da8036.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 0x8611e717c82c8c60b3b172c6068bf510cebb71947fc29336a1778f0763c6c84e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXE0F2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79341251cdbad29c69640aa27a855e438febc5d6507210486835fbb05d962115. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BXN481800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1267e1e9aaeb144bb035ff9cf350120ef240eca7b55c46b30120eadab504141f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BXN481800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250e2d77522731cb76368882dff0a396ea3c093383228ec3e6529b0b94b8fc0c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/BXN481800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcee89cee2fe8588b54bfb0592d6ce9c699431763dda7c50c98297536daa88d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BXN481800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21c9c6a2ef402f0d796398922a980689082cba48d7b64d2220a91990043d215. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG1869222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3134dc492e9a145dd8c42bc91c620e284514930de70d8bc064c8667dff62077c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXN481800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ea4115b485ee05be23987abd3cb99d13dcedbda2fe907dbe54b0beb3866a99. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BXN481800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22715a2b3430d35aea70e3e59a65c56040d08d4de981d32b8ac0865d2626e799. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BXN481800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c41d916bcb8334724859b493edc1deaa59aa58d2f382bca42afe9511f514dca. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BXN481800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aee2f3fbed3399dfab6935c23012306b2635f268b6a4a756da2f07729b1f58c. 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/BXN481800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8312adaeb002d880d5ed8496e69e46fe6ac95c3817513260f81c0e485a6bfdb5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BXN481800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e81a4fe759048238282fa77f41218c00aef61cac45fb256467ca26f7047391. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BXN481700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb906a0d50cc27a77f8102eb76ce1027f0a4dfe2d500c120b9f4f5d08a88b6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXN481700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda26dae33bd31cba9c0b279f7fc7b925ef36b9ec2b7ae878b2e9eeeb089adbf7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXN481700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fe858660d477dc529a21116e6e898c2f1860c1c0524e6384f0909d9c8f6644. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BXN481700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01143eda41ea5d155d3a86cbf86737a8cf0afcc251db6d6ada5a5160cb89346f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BXN481700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42914b90353d36e5435926890f996fb43dfff64c87cbae4b360f29a0046d65a0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BXN481700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb9cf6e27ec9705f29ad78d024da902713d115dbfe3e44f82caad33c1ce48e5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BXN481700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b4739ef0a13bfe3584449f5534d44c749ef802bb7ded5f1a2b8e5a8d5f5cee. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXN481700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff61085b535974a55c8f5fc0b74cfa32102211b7a5226a7fe459cc66e954bdb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXN481700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406924e4c1f979ab235eae3b54e5a2e43a164469b30196a366651b0acabe0e32. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXN481700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaa687523ad7213b511de175881a6826292fff30563a19d1099e04436729341. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BXN481700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe557cfde57eac8e67d79d4a0c63580b20eea8c252e7626aeccc98b62c5612f0f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXN481700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215ca2908f4bb09c3fceb6f9db3c4e3446f7480e9688552dde5db086f0fd4b24. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BXN481700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4154b7199189d7f17932a9438ae9cfe1b613eb4de8fdcf50ce76d985e04561e7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXN481700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7107df30555d7a17e8547f0bb5e92c6ffea43b1f9ccadba1b0c43033f18e82. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXN481700027.