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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549d1d286c9b459e625a0a3905bd41a7de6d87d29723e4ef2bfcb660cc39572c. 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/dbfb0505-15db-4af6-a167-b0bf00d04adc.json and https://artists.proofprofile.net/proofs/artist/dbfb0505-15db-4af6-a167-b0bf00d04adc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ff99e27eb8cda693e33b92906c679760f00494bfa12e6a722c9ebe00a0927. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:09:46Z), 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/QZES51863514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4f78833743a9c07147ad355960ad7d8c2a23b1724702285909ce86b9ef7e1c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:07Z), 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/QZNWU2507954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a87494ad1b3e0a4ddb10bc6a50b5cae78988c27c3ece7bf057edbbde3dbb779. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNWU2507955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97302f27d1048447b4f94202722905058a11ee594ef6cd0e52324cf97682397. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWU2507956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb315e5f72cf0e966b7b2d72ad3cd01128b644058a532421dcb6691e4a64b4a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWU2507957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1827d01fe211cf4e440144b53ca52a34bd607d0b3ebe4bf13c44e85c8273b76b. 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/QZNWU2507958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abb3ea90ca4f1b8088cb2b71e90bdf322ae14d65d7d72217adcd9080290ba74. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:46Z), 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/QZNWU2507959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf36c0a250bd9973db27d9731b6ab48f494b3aba35d2241bf2e6fd68e046e49. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:52Z), 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/QZNWU2507960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f786cd1999b5c5c27ba436397ea33b09a6e366d748197cd0de9d64f25aff63a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNWU2507961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049a8fa6b11b2ea12801c21fd98fba6ad23b6ecb744fa690111c5b24db46b47f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWU2507962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1747a1d7e16fe2a6fccb06fc64e8f4bcbaa32bf451a172620f38ea938044f87a. 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/ES71G1509834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9697cd1bd96cd0a8c17db58c5ef19a65dac3a921ca89890fdaa38bc00f9a7b3e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G1509844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88108676a8e27f829bf0d2b9b5c600357c959b2015e92d0b72fa2b416a481b80. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCACJ1595408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2423cd58ac825534d026f2e6aea7175b9f94963633ca83602ef3e4e7c1b1ba35. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZNJZ2124991.
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 0x40ff306d3dffa32530b525b9149f6a75db30a070422eee2e621028ea2e6d7ce9. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES71G1509816.