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 0x6ca7c042ac180cc94ff7e1eb27a5860bceee7b4a7a0368e92be11008102681f1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a966954f-ee5d-49c8-abf3-181220533a26.json and https://artists.proofprofile.net/proofs/artist/a966954f-ee5d-49c8-abf3-181220533a26.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 0x4bdff5dcaa3cf4b5ab52a112d428c252f625ba441698656206377367deb0e276. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDQH2412042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f44122becdc76262fa08c3b1f104c8984f060a95f8a287de84338f0a56059. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTAT2429697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dac5bebf8f6641ddc17a6c347fc67e2f0d984ac079b1e215bdbf98c06ac7e8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTBF2439588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b96055511eab25b64d3d0cbf09b574873fcbc5e6d8549d86fe01200085777f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:52Z), 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/QZZ7S2411034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6022123b53564c09beb5df36d3e7631e4c21a64de0278aebb8cbfa6053ed92a5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7S2411036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d465d3c27e9736193beb708734a49cadd488dc9ef6821ff43aeded372c77b8. 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/QZZ7S2411037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a08d3c21204094b734d18bf82dd8bfcbf0425df33360a9a4fc7dab6dfc62fd5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:15Z), 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/QZZ7S2411038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc778507d84d9758f828e8341420dce06d2590afb5b4e68230fb68f027f48ae. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:23:23Z), 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/QZZ7S2411039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acc75e775c60888c72ab7933804f5f2e4520facc4381fe4fef03a475a16beab. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7S2411040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb86208ef1edfe718591398e75a276408557976fad2b1ddc9a0e47fafb6ace8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7S2411041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a80e4419de73a016e838de10851490976d44e3a4ca0537c101c9bd124152b1. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZZ7S2411042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393e0880682557eeb621efc171efe98089735860fc9b03c48d1fcd81f1fc98a5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7S2411043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4318500327bedc64be0e49236731b6aadf4803a5246173272a7dca0e5dd08e. 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/QZWFW2599579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd4881d57df6f9f5f011c23a4e0492d88a56a35e6e5f7a976fbfc9676cf0e99. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFW2599581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911d7dc08b55f4f4ae19190fd54a2ca5b426aabefb4a896627fd3002d0a50dc3. 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/QZWFW2599582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec95bc4481163a4d054f6f1540e3aa50b90fa75622c0c06a0865a4a5acc8d0d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT3FD2593284.