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 0x217036da3e2f133637c5ff5e972afee10c1dd49557c5aa5a2821524bcd12d0d6. 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/0d39eff5-e711-475e-94e7-d2785bed5bb9.json and https://artists.proofprofile.net/proofs/artist/0d39eff5-e711-475e-94e7-d2785bed5bb9.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 0x74418d0117af73d1ed2ff56ca4ed1789c63443cdd7a79202e9ece4d9e51dc512. 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/NOUM72000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717962d6ee43de416a7c47100784f9d720f5c0851bd65794a7b6267f04b7f123. 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/NOUM72000331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c88fe5c52ab4f1567b9f59aab84c38dbd9e66f804d043708ff886b04c69a26. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NOUM72000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097003c802d0b04f9f1e923efc74084b4d28c5dc00ab1fc4fd9ea9a4116ef283. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:41Z), 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/NOUM72000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f45c60dba5b7aed4095a8aa76a69a51729b6ee2024ebf5c7c5b8e1737d8ec6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NOUM72100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dbb16b89e84382a0eaaaaca04d4d92c385b303a5c8fb9bc93bf1affd54c67a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:05Z), 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/NOUM72100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b33ceab4539ab55f6c62ed8e539e9603f750ac94946f5cc134fa312a3d11d7f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:34Z), 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/NOUM72100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af733eda921a64688e954a393b23a332bf8073763f4e25a5dabf9602935881. 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/NOUM72100202.
Magi (fra Kristiania Magiske Tivolitheater)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e02ad4097df570ea7db277de47d7324fa214f2fd9947e7182567dd47f17f62. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NOUM72100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f888237dabfd587c35d9a51b55bb0a0f3383f10eec72866d878f9f283a0cd2. 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/NOUM72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb15eb22f28c9580d959a79ca2201e3b9493609331b65951e4488453418fee84. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/NO2DY2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe016cb003606748effd516ab4360d6258e0bcef33010a8eb17cca3aff0356693. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NO2DY2400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35319da5921f0383a7370fafb746f628e0102b7a4e3eb90ed1766b2f1553f9d2. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/NO2DY2400527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe016cb003606748effd516ab4360d6258e0bcef33010a8eb17cca3aff0356693. 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/NO2DY2400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35319da5921f0383a7370fafb746f628e0102b7a4e3eb90ed1766b2f1553f9d2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:29:27Z), 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/NO2DY2400527.