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 0xae486e991d725a9c6f8fb0d71b56fc33a6287b217d4374b4d5fd3c2adbfc45d7. 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/4ce9b7de-f984-45bf-b57b-0e1b0cc35bd4.json and https://artists.proofprofile.net/proofs/artist/4ce9b7de-f984-45bf-b57b-0e1b0cc35bd4.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 0x5d661237854fbc7188d07bcf776ef8aab72416015b4aea284acbd4195caa52f3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/UKU932420483.
Worst Day - FIGHT CLVB x Tannergard Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7aac4bf94eedf62451e1df9007463d64c35b32145381e4473e44c113c7a061. 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/USWB12207362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7aac4bf94eedf62451e1df9007463d64c35b32145381e4473e44c113c7a061. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USWB12207362.
Worst Day (FIGHT CLVB x Tannergard Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7aac4bf94eedf62451e1df9007463d64c35b32145381e4473e44c113c7a061. 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/USWB12207362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c4e99bb41de605d2ba630570b64aa78eeaa4d8ac28fe2ec1717b220ec4ce79. 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/QMDA62114115.
No One Nobody (feat. Tannergard) - Extended Club Mix
No One Nobody (feat. Tannergard) [Extended Club Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d5e2f111d6f3b21384c9492dcd5cd4d428298f5da7b3853ca7ac8435154cb. 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/NLZ542000709.
No One Nobody (feat. Tannergard) - Club Mix
No One Nobody (feat. Tannergard) [Club Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee280b78cc88189bb7916f077c1669812ad18d02ff54a04a6258c1a968c9e53d. 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/NLZ542000710.
No One Nobody (feat. Tannergard) - Extended Mix
No One Nobody (feat. Tannergard) [Extended Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f7d7f6816196c5cdc21a51bbbcba42f2d06974774b98aaf1f5cff842501d18. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/NLZ542000165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ce11fd86dd8023f779e93a5e9a28e90dc2e7fc2a705708781e775348e0b185. 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/NLZ542000166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77023dba707c5f9976fbf0c9cbaa625acc04ca9782abe12046c324806abfe1f. 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/NL9KQ2390591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77023dba707c5f9976fbf0c9cbaa625acc04ca9782abe12046c324806abfe1f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL9KQ2390591.