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 0x56d4eb8b15ad8233941ad4ffec6902dae3502b4ca8507835d7d849ae17de9954. 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/30f0b70e-43b5-4afe-810c-4283195329d7.json and https://artists.proofprofile.net/proofs/artist/30f0b70e-43b5-4afe-810c-4283195329d7.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 0x9e00a587647e793b83c7a0e84d58de6963e5658c4a7475f2a319fbf157255225. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLZ291900126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6752e8aa99c170f5f0395fef89008b5deb5073d70db2bb30e2978c256b7b3e2. 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/NLF711812059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ba0bb702ba92873b3f6b66b80844fba44e22e887b455f0b26d7bf1cbfd3342. 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/NLE802000211.
Lounge Top 50 (The Ultimate Lounge Experience)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9281d4e77ed146e940c801a590b5aee2a16c1bdbc5af608abe586786ec5a1a53. 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/NLS241502336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef73e175d0d9efa8089ac16d950fa6830090c90c020389336a5e6407564d5d1. 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/NLZ542100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d07754f2a65368eebfca095e8ce1b25d30fdefe20ead442e27f124a11d6dd7b. 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/NLQ8D1800144.
Blackbird (feat. Jake Reese) - Calvo Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9047f08f189d415cc8132801fcf23e532b91d572a3639dc5e4d8ebb3ac4bcbfa. 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/NLZ541800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f00c4221359f02203ec8632214a55dc1e37726caf3c864182279ecf65f4ce4d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLZ541700289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d07754f2a65368eebfca095e8ce1b25d30fdefe20ead442e27f124a11d6dd7b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLQ8D1800144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ac082e1275102901b610be382f4694857929e4c3a4fb41748e882adbc0ef6c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLQ8D1800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f00c4221359f02203ec8632214a55dc1e37726caf3c864182279ecf65f4ce4d. 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/NLZ541700289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef73e175d0d9efa8089ac16d950fa6830090c90c020389336a5e6407564d5d1. 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/NLZ542100362.
Armin van Buuren live at Tomorrowland 2023 (Freedom Stage) [Highlights]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9b50734e32a1d4e5011f6494180ffc51df8d8ab89597fade640646be903190. 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/NLF712306250.
Live at Tomorrowland 2021 - Around The World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a89309800dc9b4df4393ca4996319b295d9d525e476b4d70ffdbf85d5beaa51. 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/NLF712107279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f56ce731cef916c8c3136b988323e9ee3623c587c6659a1f6a9e2cb306cd04. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLF712011945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50276d285801908cf27301c781df3809dbf7e2fd455c1cd5dfd7ce6b447111. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/NLS241502908.
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