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 0x67a2af4026c206141be178ef23aa2035b06265b87da5a485bc98d37cf6ffdbb1. 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/9adc2083-ff9e-47eb-95a0-ae562b74f7cb.json and https://artists.proofprofile.net/proofs/artist/9adc2083-ff9e-47eb-95a0-ae562b74f7cb.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 0x19b7e6d094514d70318d7ea472ff161daa726d4c5ca84a2a54afb45865b0655e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLT2H2300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdd8088585c38e935c6251e270e24060123e11227ce9ea25bcc2df36a990fd9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2110406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6200a1c77c99edfbe7b54bc263154ec70edb9c05879741dd3e4956cad5766b35. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHZ2432885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6377cab538c7bd50ecada151203b15f0e2634f75f58c03cd52e9968bc3c5b9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb603158aec36eaf92adeb499113309099b28c36a608102ec807299eddc60c6b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077725d7afb02347ee2221107a0903f9442272ae667825f6f7423aa2e8d2194f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0R2302137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778df0c5b392cee284d425d9ff98628363a6656f991219c2756363dc102e8865. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB52333362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758e96f396a2e1b9358e0cf24de2706c6e5870690d79f1fef90faafcba8880d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEA622302227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bee6ad5eb7fe219d7e705fc8bb442394b7cd327a6de084c2e0c1f8bf4932eb0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f6eb78c7ed77a55fa8b454330dc2f1afc1d349c33a808dac89b9345fb581fd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX8LE2397747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357b9710d63980b70225046e3ea867fba07000e6d85f06807f5522fdf855548e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8LD2323952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7578c559b98fad8a6be218d43069cd2ddca3d9464188907b485a4270bf404dba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE3GO2306101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa011767328c0d24d5e9ddc84195805e9f7b2629fcbd3d7486d4c256c278e698f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ32323837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba11e5ba82936ba28271cf204a15bd326d1395df8d873dcd81e042261170af3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2210445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45df00f56b62a659a1543484e954ec386a88548dc17b1b0af867eaa396235e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA72263622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f07d5b3500350ceb820f39ea4dc670587d77d0b461eee31fee541a9312eda8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca6e6c779cf95a0135dca6bc79a58002de7222e48de66063293b96548a87bb4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USA2P2231354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da9836c5317269f5b2696dbb254573a92c5839f7651b6b59030e7dde8b0f575. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2200339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c40588d749e3834fe941fe2721d84879629ff91502f36185b96a663b7e0ba9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd059cf896f109c4cd995573a9314ab14589ea39cf55838c2f27427ca55dd30. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e54ab0d41bb6047841932ec90ef77a879b9785a99e9e2387187687883a8943. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:30:59Z), 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/QMDA72147468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3447d8ddc1021a8bdcff95995e35790f44f3770759343c0b6d47f535aeaf2bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2110162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db2f60b5054fc666dbc23be39766ffd93a73c5c7b4d54520f8f9a520e90d80e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW2184862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c3717e41e470cc2492285463082a184a0e0bf51c49732df380c89c97f09e7c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2143501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c510e71060632f8cb9727f2f26f1c48a8220b9242dee5105780948b072650f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282058024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa264c2d968dd7230e4f13e275a104318a10ea7aa907cc8590ea309cd8e0d130e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2010136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b2fdca5c2be4c283d00bdebc03ed1375a21ca63769bf733c8f52b297b12250. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEY2016295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31b7da68fad8d91399b4a26391394b453b8cf54cc1c7abf5ea4168b4f84646a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAET2024109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea34236f46b027db064a710d6762031a856d2253999c3818fab93f7ebfe1e16. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25bc12c707c6c070e1524c2957dba97bdc452c24f3948d452e2394438ae22ad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUM71906736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3f45b6bf28e25f52cd214e2840e9a66a1ebd29a7acb6ee559ed9347ffcb0f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEL1981784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f81db551e940d05380ae321b7d66cd0b850d726fda55d68fd12589eaceefa0d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEH1983630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c6141f0f2dc9ed318e30fbf95b9c675130b8cf3ae774cbf2bec132bfc7f8ad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAED1944794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb9513e9871aef1627623544b07327852595f46c8a90bc4fc17bcd1e4de50dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEAX11900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb70333af58c5382f28120da419f904907647262d7626ca98960a4384e23594. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADY1834571.