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 0x7a404dd86bc22a746a5eb1a7f4055c9861db7175432ceed5af5faa97cff4656a. 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/2ccde06f-c3aa-4b4c-9fc1-fd9005139846.json and https://artists.proofprofile.net/proofs/artist/2ccde06f-c3aa-4b4c-9fc1-fd9005139846.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 0x3da15e2067b281c80465b52183d0bea0ab5ffa56d11a2877f98b10c699815aab. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR9W11911194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c9b45157666d0bc2efdb8d35ba2f0f341094721a1564b9546f31cdce6c1016. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR9W11911195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a7f4ab0322e904f72c699acdd89eee15eff21f3c620158d82c480cc53763e0. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QM6MZ2152845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742eb72ab1e686e074a9a6989e9787983b84313fe6b9ec87bcdbdc5a0c65a2ad. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QMDA62118205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742eb72ab1e686e074a9a6989e9787983b84313fe6b9ec87bcdbdc5a0c65a2ad. 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/QMDA62118205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca2bcb577f12b91bdbf5ed2daccc928dc0fdcd28eb3111a3c1a89b90db3f46d. 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/QMDA62118204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ae001c8627bb02b0fae66a7df5680798bdea41a2b3faf30f50917927822315. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/UKN6K2100883.
Shall Not Fade: Marc Brauner & Tender Games (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df17341b1fe7c0dde53a1caaa4ddc8c7666092af262a9f9a126f40804d6553. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKN6K2201840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a525c57e6f6a6945f181dda586254fa704c27e82a60d2179949e342723ecfa. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/UKN6K2201842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2afb6d74962f8858b69a74c58467b12a0ea2436369a727907ce062a2db940f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UKN6K2201843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ae61587206d56410fb9fa846903ff0e075df0d1fd4bfdf4c1ef9916484bc6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12253742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128265f7c474feff46fc30063be72f139f79c29180b4cdd97b269c913b8ae7ef. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FR9W12253744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0bfdedbf34010a6599084c97d3a01dc435f4733e40d3b420ab2436a77a2457. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9W12253747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9235431adfdaedfda8d0b553c57bbcbec43ef64ce2bc0e16fe1eb39c4b12398. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9W12253751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd076d0b6a8dd35b1bb74a37dbc8df46c267cdf7ecfbbd0018bbce8c15c9e4ea5. 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/FR9W12368574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c8cf11d742a7f5789066330b6cbcdf2143dd7217df8931496ea88bae605a0f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/UKN6K2400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbbdcadf5f1d3c2071c52d01e19850ee408685c2bcb9edd6944633309810467. 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/UKN6K2400397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e549e25da7b803d3efa36ab66c422298d1c8a6bd77731ff1b28391ab2101bf. 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/UKN6K2400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c8cf11d742a7f5789066330b6cbcdf2143dd7217df8931496ea88bae605a0f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/UKN6K2400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8d4264dc2858740faa56f9127a50d86bf9564dc2c97bc474bd2ed42f3ae119. 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/QZRP52464813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3745fd2eaf8a0cb6e0d4b71ac0c90f87cbffe2d6b811438b16d3d28af9f0bb13. 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/QM6MZ2586311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d66db5d9b27628e8676eec7534fc831102e9355f74a24ea3aa75f31610a21b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QM6MZ2586315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f125a47aa6a4fd29c2f7863655a9e4f5e9ab5fd30304abbebd89df827d6960. 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/QMDA62572038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96ac00e088afdd56be0a08d688f87d065389337bd3accbf8ec0f1f5301db746. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBKQU2111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd340271ee41b01b1df4820215fec49cbf8d99d01d2f3e67c25b60b00dba167ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLZJ2220391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f96a6ee6f785b6e9a8d11339e46e3aa1e9186c3d65257459bb397abf6b7a1e3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2310614.