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 0xb98cd294bda8a2207747c7139ba528e63a6e2ca07cd3d846a8b2e6c1d8cc0b82. 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/9e14ce6b-0498-4ffb-a205-3d75f7d3ee8e.json and https://artists.proofprofile.net/proofs/artist/9e14ce6b-0498-4ffb-a205-3d75f7d3ee8e.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 0xe5dc01870ce6e70d71cc6743162eba38b986c0ce45d7f540d096a4d0dd833575. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:50:16Z), 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/NLF222100805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6847c201356127c43e9afc36a0aad82c87419a9ec82d49d08c30d309088deab9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLF222100801.
The Long and Winding Road - instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7433e5d37d840f90679567b21cd8c0cd626f0cdd9270275deead17a0b68f8e3d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLF222100807.
Take what you've got (Xmas instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc26efe1049216a25b7a8082e99091d65bd18d919434863b36f0cf24c49314b0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NLF222100814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d320ba17fee950f4322f2bf32b9aba8568c1c6885ee787227c48affa749034. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:41Z), 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/NLF222100815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9140602629549819f095a67c1b67a468e63f3fe02a83bdcec657c3d5d3337275. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:40:53Z), 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/NLF222100816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22602d28a66849649d4ed1987239c271175643934be35c523323aea6c2183a98. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLF222100819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f53fc6777c99f49b709f0e8f9114241b4f939e12899fdbc735ac96e28953c16. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLF222300100.
Sunny Afternoon at the Harbor (Seagulls short)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199a96e83b44bc50c55cf10c5394cf687f2943f4c7880c89bc7e6e809d4afe01. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLF222300103.