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 0x3c9123a4d3008053a8f23f0dcda914efa8131433ad71608f401d6b691fc8eb79. 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/5ca1e124-c663-47df-b7e7-0ad64e5d8fb1.json and https://artists.proofprofile.net/proofs/artist/5ca1e124-c663-47df-b7e7-0ad64e5d8fb1.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 0x70d9f7e195d459385bd728e98e05496ca6328e82f6ca66fd4d10d6f5c1d576f2. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US83Z1661470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf84e5fc480aee5250d803faed3688ec4535a88b70901810484d3cbada9ff58. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z1661472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27881fc49b06c270b8b0155db61b06fe1a91bd44e6a8d6a58ae4c974b88bd206. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/US83Z1661461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a54d3f7a01ee98449fdab4cd86fc42f200e9779d0a15d00607951bc5e9636c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z1661471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad98a2e871a276ca86a8490a6651d5bc5a560c62c425ec987e1362fa3d20efa. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z1661460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7358f8860f502e7073f6abd719f3ccf05be9ee172b91df9b414ac20b0b632a5. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/US83Z1661468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9a166bf86b424acf18ed9b03b3d45af5824566423372ba344c62b5944286de. 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/US83Z1661473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d74b0f03dca67f63a6d94966d17e3899ed50d7a68ad6923449fa670a16c5d62. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z1661466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e14e997af55fdd5f7d1028ee61217e6d8d2d0a0c0f9f45a1449fb0e2d2ab47c. 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/US83Z2352254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f99422b15e28fad075e191c415b9081f873265c58328afb8eec6bb57b7b4f00. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/US83Z2352256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc238893ccdcd0d11789611a972530ef0e86164dca5165766d482b1e6d27cbafe. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEXO42203821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c73bbf757c82abd4433ab692a2fc39a82a0b377f65b2e01f03a56a56c7872. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEZC62113607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc661c7fb2da9214335dfca0925df495863a8cd6789a8869b5954ce13f8eea. 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/DESH41900469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529e55f9e9eb5fe2dd9bfc8f11cab7e1166ca6b59ec5da9ce0515052a5f5ae9e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DESH41900470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42137e57208db9fd0d2793a5eb6badee34817fdb8acbe3226b44b418a7de1e4f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DESH41900471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15544b44f6b45ba0a7a8b7a0b142f9972cb3c5f7fb823de0ef69ec3024ea4a27. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEXO71942161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb208a384a8a78fe2e072117a9894372468d7b68df8d2cb942d9df5de76cc3a72. 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/DEY471980349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b9874b10f9c8f3fd5c1ab21ea1a327d429e345ed16231952529a89fa3b2fc5. 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/DELJ81875316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a26a90f51c92e5fb68b8e92611d46f23dddfe9c9a5a8f730238bd8f12b37841. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEY471722383.
Dreaming of Space - Lukas Endhardt Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2c5f6a9e9d106f7b04391af836a3559b94a9f14a3dd3d4e86d8fd6ee061acc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEY471722384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59ef281fcfaddb8fdc8d115a00fd3f3509677978a379191643da31982066e8f. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DEY471722385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ad5ae2b6c72f35825e9289ea5e6414c8cf05d08f9efd453828fc48185cf538. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU1492493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3c98d73e6c38a4c593f8f2ce0c457b70a40d302ece352fe28975cb5e029b61. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBKQU1492494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c6840600605fa0e33de766cbe3852da55ef084af5d2ff392e6ecec78380998. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEH741309608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb777d552f3a4c9b42df4351f5638339306951f7879ea4694842033c77c40f7. 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/DEGD51306375.
Bar 25 Music Presents: Bordel Des Arts, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983eb9871f0d08cc8b4a797be8af8e44adee3f69131af7ca0681bca8d8970ffd. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEHM81800503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e24e8f4cfb10922909e64f5c945e32db426901fd19d47f6435c19f2c03e1f9. 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/DEY471812413.