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 0xb688f683b774b31f2b15a66edcbaf3702db20d584a456c9dce8e0444a565ab2b. 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/89722fce-9ca7-469f-bdbd-f035eeb67f93.json and https://artists.proofprofile.net/proofs/artist/89722fce-9ca7-469f-bdbd-f035eeb67f93.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 0x91453ffc024ff7886be73586dfbc7571a7e0b67b9aed4fc604dbf433e076fa32. 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/TWA170601801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d45b174cfb72ec84e952767cee2fcc8c6f48735f920d2bd65ab5811ac6da79e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6H2052043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dac3602eb7daec7df6e9fa3a25cc89a6961b177a174cb1273dcc3cc03d5f90. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6H2052045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdf3b6c4ac9690da3be000c6c232ffb4c5ec4d7c9c76d68a45d4a73766eacd0. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZK6H2052047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07259bf7d1bc10f23aa7e3dec1a7ecfebe5dabe4a80d65d593e3ef494395ad20. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6H2052048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04d1048bf0bb4c6693a27213da95f09ba33aeed7b990623c9271611053f2172. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6H2052049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6da5e3aaff21e1bace81f7c82b0ff4f2e7192c7b0e0737f681b20472b33718. 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/QZK6L2083126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d46696fc54bc18fb036b15ee04dfd29d4a30f9efae056cb98b5a9f45c701c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH6540869838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc291595fbee4409dcfe6a351e86825ea5e768dbb16fc4feedb04feb5af8b52f1. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/CH6540869839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e3d5c581ced6d9a1737c839a476d2c79d255986ac39987f24b1ce5c5061abb. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CH6540869841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a37618c85a2a4e4162b731c13bf7cc479ad15d1c4b0e2bca510ba77b4848a9. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:12:08Z), 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/CH6540869845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d91c2b853b628ba1a761bc14bd4f1160866afe3b5448defbf33b767a8129e7a. 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/CH6540856069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef512d9a70437de7a5546f3f5a34b78644e10c9f40ec744bc57d1bbcfddfbfc3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CH6540856070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee5cfbe4eb62fae6ab8c602cc4c702ec07cc8c3adba92ae60548da5b566add0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CH6540856071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f2e586b518e99824d78ffe338cc7bafbb5956c0fe97ac0a22bc0de562b6a20. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CH6540856072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf881421cb1dfa7ee5e0bbdfd9d5f28698c4d573267a263c25e3177bd6d6cca. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CH6540856073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5bdb0f35f20a6fa3887bb4be801c90c0420d9b8b9f7b8efcad2d3005897d7a. 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/CH6540856075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e555b5d9975bb6e5711a85fa16df6adab65c65e4a9f7baf9efd34ac2f56ef71. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CH6540856068.