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 0x490b47c1d4d0983e2dda372c3c8f99948db05543ebd4ae723b18cc778ed0a207. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0119040-009a-4a99-ac6e-96c5ee0bc468.json and https://artists.proofprofile.net/proofs/artist/a0119040-009a-4a99-ac6e-96c5ee0bc468.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dreamy Keys: Meditative Piano for Relaxation
Harmonic Piano Cuddles: Blissful Pet Naps
Charm of Celeste: Piano Raindrops for a Babymoon Slumber
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 0x1bd0b4989340b0dbf2341522b94e19b11654c9fc4ffff9b054f7762fa2260326. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZZ972340193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d10b5b788b849b7945d3faa77f4eea99ad80c90633ae69ec51265080630d639. 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/QZZ972340194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d93b5812a26aeb0810c60217736b8be65aaff6353ba3bf9c65293e089b59c8a. 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/QZZ972340195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fe51267e8d7dba321b397f2bb638c06cdd09bb9fb5f477d8d4a5dffb65d0fa. 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/QZZ972340196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eaa0e9eeff15f2bb95fb18485173ddf58a89c5a57f242062875bd90dda0f59. 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/QZZ972340197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15112fc2b8adeeed8d2e40eb8ae85f372b96aa35a3dc39ecc24b6519d08909fe. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZZ972340198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd15df5834f50ed6e4d7946748adad2d28cea86e63a5c4c5c53b725e86257811. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZZ972340199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32235c3ad6cd1d44516e31d7243777979cd622a71a2252457d108ee04d600ffd. 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/QZZ972340200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb72f334cc3efc4b7bee4c35cb7d59e331cfdbe4ded7b7d0b0bb81699d3ddde1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZZ972340201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1ac0d46329c7ee58d75ecd942f7f061f0e438fb82f6b4cb7458239c7176121. 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/QZZ972340203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dfe6bc150c6bc070f27fbcea9246d489c6100c6fac013074991a33165d14f0. 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/QZZ972340205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ae012756d1162fe4a5e1843ad12e4ea496395b61dc9c9042b06b92b8a355fb. 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/QZZ972340211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da942cf959a4ee23df5194604049523f154857b1951731f179acfc5d05f7f71. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZZ972358263.