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 0x4069131288f766bdf1effb7a961a43652920c41ca98046de867196eb494675f9. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08aae0e0-6750-4c47-a35b-d2d5977eae37.json and https://artists.proofprofile.net/proofs/artist/08aae0e0-6750-4c47-a35b-d2d5977eae37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hair Dryer Sound 1 - Loopable Without Fade
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 0x38b291082877cc6656968120904e2bdd6c7c6f23e33fbb12230d93ff855339b7. 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/DEXN82311312.
Hair Dryer Sound 2 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30631db0181dbeab097d4cb33223c3a73910694fcbdba207aa251ffc39f66e7. 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/DEXN82311313.
Hair Dryer Sound 6 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc6d89bebd9d6e74317ad7bc7672bae272b0f13e57da6f15c5c095e3801e4ff. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEXN82311317.
Hair Dryer Sound 7 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171bb9672106e08a060afbd24d5d04e644af64f62c9132084f074e73c87f2d7d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEXN82311318.
Hair Dryer Sound 8 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdf94373489e121e097c7f0fea6ce1dd1b52df7ed31182745d3cf30c263cbad. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEXN82311319.
Messy Floor Vacuum Cleaner with Brown Noise - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf632bb2d35736f2a96c78e3d060caa0365da3b68df79495e462a3be3121fae10. 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/DEXN82317444.
Messy Floors and a Weaker Motor Vacuum Cleaner with Brown Noise - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8837537981bddb8b85fa560d9c88ad9e4ed80b2af6e1c71ab45c14082577d75. 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/DEXN82317445.
Hair Dryer Sound 3 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f634f7d31d5a526a333856982faccaf5d2d0d6785d5ed86e7d0cc8882fd59e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEXN82311314.
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
Hair Dryer Sound 4 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdcc98caa43cd0002b1824da36f3acf9d0d5db8d33050fb2c634702c6702190. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEXN82311315.
Hair Dryer Sound 5 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc36753d230795158f100534502f5af3b386ba25477b6fb049f82f31c543d1a. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEXN82311316.
Hair Dryer Sound 9 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ac68607b089615c74959b4c5fea87efb7f9f8458a7543137594deeaf7f7003. 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/DEXN82311320.
Hair Dryer Sound 10 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549df228d7582acff4066b42fda6affbd6fc5b85738cbeb010b96163f8bdfd01. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEXN82311321.
Old Ratty Vacuum Cleaner with Pink Noise - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae048d35b3e3fc566df9b3c8cb3ac7ddf0ea56972b359353e69c5570c071c51. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEXN82317447.
Old Ratty Vacuum Cleaner with Green Noise - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbc6cf8786431e0203a1018e4e1d693230de06f2695d23f42cfc3c73e227a04. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEXN82317448.