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 0xfad032972adf3b54e85cd2f4f2fb4c577771e3503830b316268246f1e5b5e980. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acb69353-5412-42fe-bc1f-54ab09754c09.json and https://artists.proofprofile.net/proofs/artist/acb69353-5412-42fe-bc1f-54ab09754c09.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 0x7b036b43484dd5018798dceeda338fd7a2741d50d8177d6f699e867724cf90f5. 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/QZHZD1916347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aecf3fd12eab7d5c85f95cc55285fcbcad35a076f84d47884d3f3436dfffcf3. 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/QZHZD1916351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b202c0c2ff4b9fd417ac3fb8af2f05c54b97e314db14a13acaa8848b1694cf. 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/QZHZD1916363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923408319351b9a95cd5376b99d13be526f4592249851d345ce4e4182c7e839d. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:41:21Z), 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/QZHZD1916379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821fd3e01e8565ac6a4ee05d3b51ca77a844519cbbfc35287bba44853a436be7. 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/NLRD51632795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e89dd77b4f5dc48d951ae987d212ecc01298362826a9cca001849f5f2b6dab. 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/NLRD51632799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6d41843f51164fa1bf2ea0f94528e42f286370fd5f29e5caed75234b8c8fd. 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/NLRD51632796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111b21beeba26163f3fab685a341e6bb5b041a7f31375c4306e5a23716f76834. 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/NLRD51632803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803073f9f30eb8852d530bc5668d86b5c2e9941033feb632c3137e785227f1c0. 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/NLRD51632797.
when ur around (feat. San Holo, Taska Black, Flaws and Mystk)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa167c7814be9d3601070637ad0efb39b5f89de482ad4dccea4dce03631e615. 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/NLRD51632816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf28b19812e31f33ebaa61a726020c3b4a86d92ab795bd89033ee163e7218355. 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/DEVF11900853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3ae98d13b379ac3e9b9d4b04b1ee2f1cf950e86d8e5a8bf81ea519fe8443b6. 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/DEVF11900833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc582d2f2a3aad55aec94767932336285e2089a4330fea84d21ad4bad794a989a. 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/DEVF11900850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60521204631c6585aef04055c09a9b2586606d003f03691250056b5e06b4e58e. 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/DEVF11900858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9539881f80be8c550ad9efe2950afb84ff10535b4f9ac3d3f18ca0b419ffddab. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:17Z), 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/DEVF11900797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3261f7966d13ffcfd8e558f4049b8cfd63dfa11a4eebfd5c0f1166c320f140. 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/DEVF11900835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0f20e4336e20878c0b024198a1927094cf9375651b5811c71188459172d111. 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/DEVF11900790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf671b2e683d207847d3a3c1b2121f1b4dddfdd26c91b93b0f46f72b2dea90df8. 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/CA5KR2189072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9e44d8b1d12e7c5ae5427b65f40659fc182319fb025bf15b9677372e48e66e. Chain 2 (Bitcoin): anchored in block 959110 (2026-07-22T10:20:47Z), 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/CA5KR2189073.