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 0x3c9a823ab6ab403e379cec9c26ab79a32a158e6de34f89b7b51b9861ec9b6f18. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5502c22d-80da-4afe-a89a-4e43b4161780.json and https://artists.proofprofile.net/proofs/artist/5502c22d-80da-4afe-a89a-4e43b4161780.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 0x4639f231ce3054149d762bdaba1cf57c5596a6276b2f80dacf501bad8e24658d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITZA81900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3155fb2c9397c2b59b87888e133487e19336d9c955c651b5d8588fb5eb676e. 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/ITZA81900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2ef4273db06532e9aaeacd239c06b53152f40d619233027367849d4b68cb15. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ITZA81900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c70f18e92d7d85030f715b2db93f78929370ba8e16c710a30f215118d863ad. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ITZA81800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6568e5fce42467a0418cdb17d45e04c7dcd17bd7fce3998471e42f4133359e. 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/ITZA81800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d404df6141f50a64d9c1f0e2d7aa2865e59a912c1b4477b2d1febf8f2317f3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITZA81900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad162f8efd94ef0a9e3edaf28504611a80c6db0c18c2acf408081070785a2fb. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ITZA81700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff2e7d897b186b2e4b83dedd51c4cb524a52ec7c14764fe0536434ab80e15e8. 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/ITZA81900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ef9f2c5c77c53c1ae5f1ca40b8baab980b710b22903bd95868a4b2e603e3ce. 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/ITZA81800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1655fd7274834995eca2b545579c057f3c448a4a77914c2e5948da1ef23e7e. 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/ITZA81900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e474ed3a8734ceeee4b22b35b9abefa7d9886f50eb0814bd971bdf0bbc084d0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITZA81800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa634359dee586a1329ded1f594e2bede3f3ba72793aa2903b53885446e58ae9e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITZA81800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb71c730e8c3627eaba98408f729a7279ec47346ed6bb739aab882c98494583f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITZA81900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a4c417135179249d2a4c05157fb96a963dd46ec1aa488424c7b6a58fbe3157. 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/ITZA81800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a1d829750cf9b1ff9251611948ed5bc7d28bfbcc250ca318c494f93a57966a. 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/ITZA81900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3219296d5c453684d3e65f62f6bf2c17ca405eb7d957e634ffe3aee44e745a49. 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/ITZA82000020.
Pollice Nero (feat. Stoma Emsi, Killacat & Lethal V)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd442a5b009a3f3866a85446689d737b320b4d8617c39bd105f0aab62be41dc35. 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/ITZA82500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b6e4fc79bd8f8fa3846caa6e7c3a207586cc9b067830c16f73cd8283a7c125. 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/ITOGB2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac988a0ebad2e9cc832eacf98295e1e427f5b965fa7e82cdef35b3f06dd9fbb5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITL600900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680861ea776f1bbdf8965ab5c5787420a88c9f9748b140f620ad32d570233b51. 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/ITT151000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd895a2e1f54926d97c9d95c368b935b55d6f55544a9eae3146c6ba0661a0c9f. 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/ITZA82200002.