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 0x4294bf72623dd682f4d70ea315603bdff74da6c101fc8cc68c85dc64e06e7b28. 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/a97569de-6e0a-4b51-b80d-682acbb29f74.json and https://artists.proofprofile.net/proofs/artist/a97569de-6e0a-4b51-b80d-682acbb29f74.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 0x6385485c7e0766de7e7a2d6ab21ed67fb21dce0538dd0a5111aed1b623d4e7cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZARB1820522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e3e66ec34bcba884deff675a0207df742496fb5d11e648f2a61103898d6f5f. 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/QZARB1818730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e488eb2b1073b16cee96a4599aef063f26ee7b651555797d3559ea4a603d5c1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZARB1818731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838aa5e52a0144ac39337d2f39cdeba82554ca90e422d16a9b7a48e53ccdb305. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZES71894306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604a978cc24b6324f184b9d468eecb681029d3d880805a5f63db42e6686daf72. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZFZ61990030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012b31b2fd3c58795347c34a281fda5b382213ddf87b0ec57c68123f12ed74ba. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZK6H2146869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c96c86807e0cd564ea6d2f659fb8af8eabfe21010a87fdf71e5923caa8de9df. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN42112662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1defda16ebcdc0b8acbaf51b4b330bb7983a9a3458b59a6ede39f84c21a39596. 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/QZFZ22048848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5b52001214cdaa62ff2946fd02b5f334585d4528d77afe394a9ea9af6c9de5. 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/QZDA42198817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126218c7495f924e1e8120b65934d7c7379e8f82bda62cc1e733cac51cdde254. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZRP52134641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8180930465e3bbf03326eacbccf12dcbd8ea5735d6b61ba53209f63599d84e7. 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/QZFZ62206653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4754604a911894eceb2fd10e27dc9a0c192b72c5356a3e8251c484efacd357c6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWQ2287005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858cdcbdc2125fb45edd02bc5cd9c17428a3f1bece40bb2f6747f8c2b979642. 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/QZNWZ2263088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091f107d822b35ddb55a81bab3c637c05d29f372a15d71f2532cde8a3f34788d. 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/QZFZ22391448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55bc0bc8a9bf13e1026ea10136be219e9732f13782eda13aa6fb33dd05b4bc8. 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/QZDA72329542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b4317e6987d8e91fe721e94ca3c2672ef85447f662c69219aa926de24efdf5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWU2198973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858cdcbdc2125fb45edd02bc5cd9c17428a3f1bece40bb2f6747f8c2b979642. 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/QZNWZ2263088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4754604a911894eceb2fd10e27dc9a0c192b72c5356a3e8251c484efacd357c6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWQ2287005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091f107d822b35ddb55a81bab3c637c05d29f372a15d71f2532cde8a3f34788d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ22391448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23121e7127c78d9e3f64a7f9d62d646fc5522c31b0a850f52b8394ae8b3ed0ec. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZES62380946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33293631e49f9ffa05a7be234a260e120f1dae9f52cd3be9b4c1d174201027d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTAX2268339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2248bef70f30992ebbdd744c9721f6c713f1fee017dc82c5e29579e8a3ee434. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6Q2351455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ce00c9a864caf11c163fb5dda23ef4f0536e60adbbec886bfab683f53fae92. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWW2355472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444c3ad3c31fa4377430a1ed910b7495f50de5910605dd837bda6f3d968b44d4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN72393445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3682fd7cfd62b926f40505316e9265203ce6570bcb88840369ed049e589ce3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB82381462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c8ff1cc7c32f85222ff0d2c3e1ae9212adb8aa5853f4bc673569d7f2bd80f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTBA2366163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b57f6b06dd26fabc8c2551ae39913646462123c787f1d5da90118f567cdd31. 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/QZWFE2345598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fcf956576609c8c3b3250867f77a4592136cd3c271d396d29d37fa6af8af31. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZFYZ2497261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fcf956576609c8c3b3250867f77a4592136cd3c271d396d29d37fa6af8af31. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZFYZ2497261.