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 0x64bff2d6c0244f84d09561e27f797f49c969a5d721122ef0a01236964b337eec. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e8fd0fb-5fde-4efc-9291-d1415ef7d0a8.json and https://artists.proofprofile.net/proofs/artist/9e8fd0fb-5fde-4efc-9291-d1415ef7d0a8.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 0x57833084b18a399718ede0ade6aec86d51b1dc5e8a3548f2cbdbaca26fbab036. 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/USWD10628930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b7bd4902c8edc26de62d953e73bf5b9bd1388b4d8ea30580befbd35cd0d67e. 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/USWD10628806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf2a5184d0132ca39cb4bcbe15c02e21c3f3757d3f1ec04396fc0b056b2bec2. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USWD10628804.
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
Feed the Birds (Tuppence a Bag) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c50fafe3651496d8f697ea17aa70a430dfdf7b7a5b0089fd9d6f26f1aa4736. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USWD10628807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3a620af9847dc7ec226336b5c608a0f958e9bb9b3c3e085f74570f193c1e71. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USWD10628809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f8cbface9da36b03f62dd361b76ffba73145cda23f78b5ce7d789b10c5cbe4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWD11366139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112ef7f2b1264c84507d1edce61a4eaa038016e089a0863179fb0d22aafbbc4b. 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/USWD11366140.
Supercalifragilisticexpialidocious - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecc43f5304c01d77ed0525a898076f94ad64322bb8fa2efdfae6f0af61cda37. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USWD11366141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d6daead9dd18092a108a1d44b8c20331a019134a285d2c23daff9f1f542b01. 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/USWD11366143.
Feed The Birds (Tuppence A Bag) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f85d4e383a852bb659e1e1e042803252b2b8386b2208afa984a8bf8e1dc4b5. 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/USWD11366144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38103c3dffd9ceb3aba677c8e7ca6fb2d28648fde638fb2fc4aecb69bc2263b. 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/USWD11366145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e24e82e16d6c721b17b8bd19522a8d339e9e4181ce38013275342592eb8724f. 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/USWD11366146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dd1c0f1c7e176851c6610a17a4f99d74fa61a0dca5b0d753178d984a18eb18. 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/USWD11366147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3b11a1f2c59cfe0a3af868ea0d598af14adf83c6b0a07e091789aead68e762. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USWD11366142.