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 0xc5b8a786dc3c1376169a193d7ae020157b0fe0b0a0825eeadb85dbdccece0769. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81890c5b-b7c4-4685-8d21-4ce499a24458.json and https://artists.proofprofile.net/proofs/artist/81890c5b-b7c4-4685-8d21-4ce499a24458.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 0xfe4ff973ff7ac5d0f183ca5e9957fead375272484200777cf1de255b13531233. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:32Z), 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/QZHN72529275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39093b49aec1eb9aa24d13a3deee6f5fd72868fdb4d7b3f26988e4f8d59cb46. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN72529276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59580c0aaa244d505b387803b2d6ab02e8765c881133225d58859af572baeb5. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZHN72529280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd530e90a8fdbe2f6bed948c6d057916f3b716d05dc17f48c22f3cd8bc5279d40. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN72529282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8a33545c897d03c7980b7c0ac40f748c0565e8d0677c9c8fa07af93ca61abf. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:36:25Z), 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/QZHN72529283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaee13c40098af9d24b231a8145ee295475ba24913b2158bca5f117605c483b6. 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/QZHN72529284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf191e72d4339fcd595c553687bfcdbfa78c1beb30d176746cdf9ca40ac3250dc. 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/QZHN72530711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86daf8316ece6656510ec1bb85c9e08626ff4227f61adf591934409e7b94e814. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN72530712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc2bf907c4808a5fff3a86410da4e184d34cbf921d524dfaeadbb156b1efd9c. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:45:38Z), 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/QZHN72530714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef7f765fbb7f4855b06c8e33a53673c778e9d7b471c32ab564f8bbac9afc0a3. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:53:05Z), 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/QZHN72530716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bfcfc041c317882bb1709b8c22e419541ba676e12478626737b5febb53e75a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN72530717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4758ccc502c657de50bf9e1dbecc164bf58307683ab51c309ccc8798de58d0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:06Z), 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/QZHN72530718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890768b622041b91d5b6c5cba784267e6764f36deeae93c1ced2d18b4e860774. 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/QZHN72532175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13cc9d335a08aeab0f19702942a123538ed87097aebcf36d060e02cfb08045e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN72501283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5917101a1475bb4b2b8e65428ff4f1f000f6f7cc7ccc55e9a5a328dd139f028e. 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/QZHN82504546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2aa4146a28377af6ceb4333163c15470f0cdb1df2febed65c6305eff13bac2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6H2510744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c73e06f40c9c4875687b8148b9e6356c57610ba2ff41f6c859205f8089b86f7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZHNC2592630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4858efa80cd829499ae61f823b1d3a4d71268b46895555dba7727cd0b670a4a0. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZK6P2511538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c4c70e73d8fec785a4949bbc02dbf9f454eb367b72cb573bbc1e1fe80f8e6a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZK6F2508618.