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 0x9da7b0eae114081eed579a898627969872371954db762a4b87c1c46758023455. 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/87765cd4-55a3-4005-bda7-c64b85a2345b.json and https://artists.proofprofile.net/proofs/artist/87765cd4-55a3-4005-bda7-c64b85a2345b.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 0x3c52547a4ec8ac223bc14e1bacd1a3690e9ec5318a7fe5a2a9dfc625bca3ac70. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USCGH2109804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7350fb97c36d4a898840da83aa270d3d22723a25f56d77308a791361d6beba10. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/USHM82185963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a22e09aacdc06f849453700ed4834978f9116d971d30f787115af7916832e6. 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/USCGH2172272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b13ca8c9b8fec5c0970c42cde66469d441a9803b5daf1127b0027fc3cf5c21. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USDY42224425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a381f98c0a63817be74bbc916b2584d79f27f158588507ad210487a3455471. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USHM82230156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bffa945dbd9d9c873a272bee6dee4d0d382d0717416d6b14da9d544880e611. 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/USHM82230160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150a005ff2a6430b71344881586fa022d0f3d4fca9ac0356697e1788dc222f0a. 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/USHM82388333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b53b383e108c32bd1204e2e6b279c39baa3ea3016051fd0e135f3156e700fcc. 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/USMH92300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b01dd97f508c4475fdb0be7c2862e3b637447bd8d7d665e4f2bee2afb474a. 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/USCGJ2460196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745212308fc487a806f471909410f08900093d614ea0d7bcf2b8678d38046b3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USCGJ2462583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56a9a9722cf05f7c1e73adb56a835200af603ef8b98d32442ec12bd87d3d96c. 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/USCGJ2476561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161b1b06ae66b38397b61a77c40a633ca61e2e8de5d3cd39528081666f9b3c37. 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/USHM22492965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b7e395cb5392a68cc4b154c6a5ea85355c99647d132b6be3b169cccdd9e9e2. 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/USHM22492127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56021ba98a11ed6948821df00fe4e1a9f544021e545b9756c2f97e826b60fa1. 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/USHM82403988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd8ccc5a56d3b619310602ec984b060baea469336f3fd510908ed85b661a072. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USHM92400682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173c9251c8ae2856b470d642750f225e4cdc3f297f8c437a964a03ff5b1b3617. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USHM92400675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c23a5d26675b42dfe3d9c454d522fd7b4f1cfda3e8d33448936bda135837c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/US5UL2403640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dd04afd2eecd026e24757fad3ad3dd465acaa735faa39a164176b51a244221. 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/USHM92445877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cacc3d6a0e07ed25804c5f13d4c0a5e06a1b437dbd350542382b694d3744c9d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM92445847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7af08d2e478b3f2483afd9e226928ce70e5484675047c4fcd01baa984cfe9b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USCGJ2567566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e0fa8ee5c9b7ce6e7ebbb8ecc9ff8dfcefe8de0760f6e8ce1b480a12df01cf. 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/USHM92446393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2c7934b2d4187c2c139a435886c50e66995c15ca4f8c575ddc44594df13674. 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/USDY42518360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8290f056c1e4b21687c522bddea91f3dd6e703820c3e31a0a7de799644bcb61. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM22548238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3893da05057e8e94a6363d2fd65395fd7234c102a5f4e89fea8d0590172d85. 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/USHM22550380.