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 0x9439516873010a71696ec7d2c1b15da45b5b3981f38239e24b05536b58e5f54a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0fffea5-d2ca-4ff3-a1d1-150a09dc5567.json and https://artists.proofprofile.net/proofs/artist/a0fffea5-d2ca-4ff3-a1d1-150a09dc5567.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 0xb730f04c7ad41aa0badd12e0ea3ccae3db849bb08431f11a891d90d3ebe49a03. 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/ITLA71600411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ce018b24e9a8cfd881a5164304a05e019d22dbe55622320ba6d19fe76af090. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ITLA71800549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da00fab1c43788144883f0e9315bd02fef009acb4d8cf60bff26718ee5bd454. 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/ITLA71900654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f52bd61475a150defa6f78864b30a57775dfc6aebe9e900a852dd4d966bdd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:38:34Z), 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/ITLA71900656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24bbdef8ed969d2d9c1ea46f3790202651b2f6098d906612c1ff2ad09ef5eb8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITLA71900660.
Suono che muove le masse (with Lady Helen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09056fbd0d1a0acc48f7fb358956951443aa2c5327c1bf75daf4ea963d98d4de. 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/ITLA71900664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660f9d79b985de667b5c482976c2b3b77058a41a637d8ea6d3a8155a407aa74. 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/ITLA71900665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a1418084fcddcc4fd1e686b9b10fa5f0b5fc420d9793da6c621c87f2da88ae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITLA71900666.
Welcome Back (with Marco Ravelli) - Intro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb269515629dc4aa955b2d12bdaf95473751007c1c6bf06126c006633765e15. 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/ITLA71900653.
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 0x9886c15f1d1ff8fe48e715e973921e1b4d3359d46636af28104172e94e6c8918. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITLA71900655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4ce506f2cacd3b8dd46c58493df26aceb821f77568a96e35c2b27460635e65. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/ITLA71900658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42448e2fc1df276df80f105539a620f9e596e19012bc701aab795fabd062e8. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ITLA71900659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b620cefcab9035a8a8c0df9358f894bccaa38b34598feebaa09806f2fbc9fc0. 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/ITQ032000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cd56c7245acbfd21bd47f5682c555d1e2f8cb31070aeea96e65b33a9c05db9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:33Z), 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/ITQ032000031.
Memories (Dj Maxwell Summer concept 2021)