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 0xc57438ea29d7a8df6667099cfc24cfed99a1110c3c9649bbec55205ea2fb27a8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a571b31-cfa0-4139-81a0-0a1583ac105c.json and https://artists.proofprofile.net/proofs/artist/6a571b31-cfa0-4139-81a0-0a1583ac105c.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 0x1729315482db41881ba14aa3b6adea2c466854619a765cba74492b24d9c293cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEMH90900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ab66bf21da5d66572afab827191750fe954e6ad9330f43dfd2c937d3611a42. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEPI82442874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe3856713357092cf58e803748bec06b3b29c22c2d608a989bb4f80c02860d8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEPI82442875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6a8bd0448b3ec42c9fa2b25e589a145126ceecf9b967efe61be0cd60b16d89. 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/DEMH90900407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662354638c6eb4c173790f99a52b98938dd535b40ce64781eaa0a3b14ec23ac3. 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/DEMH90900294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62c35272f854a4b40e2d6b093495aee43907b7f9aac0350f76ef46fae6bb1c2. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEMH90900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74373d3eb75f47339b9dd5f174630bc59809c2e75cdcffaab3f489f9a9348c96. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DENZ31000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97982062ffbc33d706eada2b7c5a1e085bd63e1347c7e72747ffa538f791ac45. 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/DENZ31000319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77372705dc461e570e984e964219e4fcb9691ae001da477adcad8128ad0febcd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2X41602790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e18d89c3d66627e1f54b9afdf75a85a7eca5541b46e9935e1b5e538b4ceff7. 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/FR2X41602791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413004b7d8430a57fc71e7353cc16a3bc9e47a67362d8ec8ff796bd4e5d1409c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2X41602792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c268f2a3c3408f11d3a2b7c595823fc9fed2e863e4a411e2e098a5c95daf39. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2X41602793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7484f5f36a1259dc21c80d48ccf51b24a64f2fec959bd21165bacd95066dfa80. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR2X41602794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7898556326a9c774483950bc8e5753f81fca875b43cd3d8c5dd0f2c929af8754. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FR2X41602796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dba230ec6b3f75bc1029a215a55bfda7d05c8ae671d682733da08ecb2a4959. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR2X41602797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb09fb1cd01fe0435cdbeddd7945a621c50e0023f04531de9b24af1ca190299. 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/GBKQU1549424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d593aee8de9eb6e1bd12a206e7302fa037cf200bb6c3759815a2c3f2889b2. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/GBKQU1549425.
Last Man In The Universe - PerfecTone Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306e05ce6d691da55d3f7e74173495fe311ef7bc5e776d832c86f0a6499caf07. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU1549426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb399699070c2468e2570f0427db8372e724a1c87d1c6c069e550e9853ccff98e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU1549427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff0c9fca5ad4943d1480d6cad80da088262ce7745501d11a3972a7de936f872. 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/GBKQU1549428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eb5123015ace0303fbbca88df9f2fc565e58b52b7b22a3c77b9301a605af4b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU1549429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fea669a87ebffb144d80712b780f45762d70c5e7d5583e9ffb07809310ff68e. 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/GBKQU1549430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421ba4bdc82b9fbae400970caf4174b22d2cbf5b9135a4b17455db6c4af8f83f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU1549431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb898136ca52360653fd760edea662aadaa93f73eb6727b40d1a6c19eb220007f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBLV62013020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892aa6cc7dbcf481b949f494a4013b08f410b30407d4a2016f765ab3828fc18b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLV62013021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c5d8458dab316140644d6a13f49a15244217f8f856abae9f173881355bf574. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLV62013023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d54bcc9e3feae40b26f7763bfe088a0496f3e3c540e8d2ad3f1eecfcd5f9b76. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBLV62013025.