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 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
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.
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 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 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 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/DELJ81875316.
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 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.
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 0xfeb777d552f3a4c9b42df4351f5638339306951f7879ea4694842033c77c40f7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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.
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.
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.