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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcb8089b98bb46c76a5b29b270bdfbf6a83c8c0648746173e2c38794aee6b02. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/302cf0ef-e14c-4744-9dcf-bb7f32300dd0.json and https://artists.proofprofile.net/proofs/artist/302cf0ef-e14c-4744-9dcf-bb7f32300dd0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d958572897b08cf9e5910ebd97354f753468cc7bc8d300d178f14b1b2835bcc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITQ030600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb8e55a3fbf6e0cf60c3061f7145ff5741fc6e8a1190fbca897ab3c20266b47. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:39:54Z), 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/ITQ030600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6cfad7cc5bd43c5e872f3395611cb69d18d5cd9f420fcbf198b45ee70dd8fa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ITQ030600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78181e7a790e73b6a9e8e0f501e0debe1d50029ac37b1fe58b9d2b2a94fde13. 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/ITQ030700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70eb9af62a6ad02a4fe18fbab40f431a0c8076e06a6a6950e991e9c0c23671f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITQ030700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5cd741341f7764455a86d1994248387606ce526c28a30651f7c92098734eb3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITQ030700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689bfcc94362604d45abac87c5bf19b8952a627aabf270d01b2db0d4ea5e9afd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:47:28Z), 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/ITQ030700047.
Alice (A sostegno di "Aiutare i bambini" ogni giorno, davvero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4196cbb16815d1384ece0b683f1da558c5fee510eff212c12b0aa68b176e286f. 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/ITQ030800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9fc78b15d02ca6be77b9fddc53b470e4257c7a9ccf07dda321f2f805f8ff28. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:00:34Z), 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/ITQ030800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df7006cd3a291460b1f26ad8670ae64a21e995954dc8747661b4943c64a8086. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITQ030800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281dc066e4ca34cd75f04d4b88ed5e1cf4fcd47c7ad83238ee634bb68e6495fd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:02:36Z), 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/ITQ031000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a042df7fcf57e0807983b790487ddd158a53e796fe9e70acf8db3c56d70d11f. 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/ITQ030900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc528060f5d865a29f3d814247be2903894a94a3701b6d2af4a264613b5152484. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITZ241000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302cc1c347e4b1887c59ee288698324f4e2a33d20d697a3f2a30f1d2d0c18ff3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITZ241000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0cf1002988451fc80bf2aae5f472486eb8599d998f3d3fb30b2b380955d494. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITZ241000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6602b067269f3a3bb07f0542d85db5d6c4ef64f6624ece7f692da5787abd113e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ITZ241000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd259e31152e139f91d2a5741b727186343504f64734e58b4649ac81319df9b83. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITQ031700040.