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 0x2deea2c612403fffdf88faa8655edd968665d13d707904cc26730ffdb3e8a143. 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/ff437ffa-11ee-476a-96c2-56ad6078faee.json and https://artists.proofprofile.net/proofs/artist/ff437ffa-11ee-476a-96c2-56ad6078faee.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 0xa150b8325818c5cf4763297280ae12bab4001a94aa94d256133dd7abb9e3a640. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBSMU5735229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131f9ef27680b3e72ac70a1ca4931574ceeaf37a44ff32a8ca369c97cf6fa3a2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBSMU5735234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095eb79c711e8ee38177cd673f169cfbb080e3f639b67243df023df3d98b058d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBSMU5745624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b87c8b9e79706a08c39c752c167a703cc31ec104ec8ff82a5fadbd12eeedfe. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU5745625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdb2d82af52e5f941a460448518ecee3a655adab014eeda39132b7b8f3ac49b. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBSMU5745627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69c93d40c7371b24d2ecfa273735819643d606fd7f89103de720bd5972df5a3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU5745629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ceec2865f225b1ee06e9680fbfcd7489b6e6856759d8144a46094bd208ec8d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBSMU5900198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa300f19a28d219635626189c796fde09384a49a3888636d002d607cf2b3898. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:31Z), 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/GBSMU5900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837dc4987d89a5b8cad345db229b0f5a24a274c97d734a2d63424b6c105bd6cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBSMU5900201.
Electric Clothes Dryer Constant White Noise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc2caac632113bdca6df87773390f70fabd9b4b7383eb7d29542200af9c28fc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBSMU5900209.
White Soft Loop Noises for Children Sleep
Calming Various Fan Noises for Children Sleeping
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b394b10a932416e4e2b765d3c3c7d436e57cc012f43cb89acbdbc6b636d7927. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU0058248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f0693c57c9e7d705df2155d76c82f211ef794ecac924ec65f061b7428a9da7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU0058255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb576baff18de5ba3d252bcf95b711613fc30abb0fcd667372b0d7bda58e98280. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:53:05Z), 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/QMHNS1312066.
80s Sounding Vacuum Cleaner with Pink Noise - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793c1146b99486cf2ee825ce9e05a01248176ec16bed035372ca08e3a02d23e9. 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/DEUE22377797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff56bb3fb9a8c4477d29b522eed6fe382cefef23a30a6be29cc6ac40a982d682. 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/DEUE22377801.
Clean Green Noise with Vacuum Cleaner - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156dbbe6db4b48606fcff48a366d891d9089d4766ae12168e9186f8c172edb12. 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/DEUE22377808.
White Noise with Vacuum Cleaner - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30d1686bb6b4fc63b684c34d3b5782e1b5902a3938d491f9a6459f0d00b665. 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/DEUE22377810.
Pure Brown Noise with Vacuum Cleaner - Loopable, No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dc0177a481f9e6a4ff912b9f33912758e27be48cc7fe2b1314377d5e15db98. 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/DEUE22377812.
Hair Dryer Sound 1 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86fce9fd758e4e7a3ae2744aa1fef02597f33b1fff37493ffb8817c47cda0d4. 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/DEXN82311634.
Hair Dryer Sound 2 - Loopable Without Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f006de375cf77122d01d311a4f24747fbbf9b005ce9bafbcdad7eb9a7f265e2. 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/DEXN82311635.