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 0x4bcb2ec22c931648834f7d4ea2009b92a7827c2eed04e615fe0efa31cf87a78e. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4956b5e-24a4-4a45-b4ff-6d497576b357.json and https://artists.proofprofile.net/proofs/artist/a4956b5e-24a4-4a45-b4ff-6d497576b357.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Quantic Presents: Worlds Rarest Funk 45s, Vol. 2
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 0xf98008379b743fdf39ef8f20195859bcdc58ce1e014c8c5e9beeada84125b03a. 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/GBCTF0700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5ff1dca5681550bbba4416b27b7f5da353b099c5424aabd8919ba7e6f8f464. 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/GBCTF0700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d95383b719a5f2cddcdcb5fa979832acd238578affacc1d766494f47c05238. 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/GBCTF0700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5bcfa19e48e2a1fbd67732998c05f7d9a030ba10b93d1343a92bad5ade0a08. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GBCTF0700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a0d494b7470ce4f012eb89f2423b00da94faf0aa02042c1b108800c4093b00. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBCTF0700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda8e84b71f0f85d208e665f80492ab4c334605c09ff893fc95dbd11e79cb68a. 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/GBCTF0700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e83752fb3e18885bb75c603ce01848c71727264b1871d7f9102b739f0b47be7. 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/GBCTF0700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabbeb7fbdacda80381e1342170766c6581ae06102bf985d07c71d724bea26ca. 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/GBCTF0700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a111286d912d81ab70859e6a7de6ea6588b1e40aaf910737af85c842f0fae. 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/GBCTF0700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4613077f5edc51933ff1a16ee0110a88432a5fa4fd08e39d83fcdf6d8d8548. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBCTF0700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c5db277ba862fcf77ea3711916a8e956983e7b2aee5c115ed8b4d41675e70d. 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/GBCTF0700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a62dd0af2dc228fca69800b8d8bf2339b952e7619f8135f82bc47351d6fed9. 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/GBCTF0700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf853072488fa51aad17d960df8eb37211d5cf7c056677313235466c9290e2a33. 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/GBCTF0600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1ad5f7b48c7f3c4651a4dc0c61a9334e71016cafd01a67be06e99c57736abf. 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/GBCTF0600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b3c239903d949adad1085db9841c43f1ea8f24fd9be17cc4d020317248c036. 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/GBCTF0700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed3d6aa387ab9cddb98c722280aca373d8e56645699034d1f5e848c2fe4271d. 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/GBCTF0700045.
Kearney Barton: Architect of the Northwest Sound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584e54983e47df10ca45c89edec97278477077a2369d4205b4fb01b59ca9de3e. 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/USDEA2016803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09825d4903a95fc9e2da548146e9cbdae68765b0f15b255d7a02a3e682074f1c. 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/USDEA2016804.