Nick Hayes (born 1982) is a British writer, illustrator, and campaigner for land access. He has written a number of graphic novels and a non-fiction book, The Book of Trespass. Life and work Hayes gr
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 0x6a5887759d6d885af43da1ece772e83d99ccfb9450d9a9b4db7b4528e2d1cd94. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc5797ef-1de4-418e-b193-440d01d48b45.json and https://artists.proofprofile.net/proofs/artist/bc5797ef-1de4-418e-b193-440d01d48b45.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 0x50e15b71a3c0f66880404c8e99099298e9cbf7a9cd2502640b9cc0502e429d55. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CALVP1946834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169f9498e044808fc9f8a36e3eea03aac0609f96c177922d6fe6faa03e434909. 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/CALVP1946837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f32118eb5ab83dc3245cbe6a94c0b6c233fcd40fe422a633db02e7fa7e62f6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CALVP1946835.
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 0x7cb6954a3da77d435cd0de6231d90807dadd3eec0dc693e43b91c4707531f5ba. 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/CALVP1946836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0462bd1434166b55ea1b43a86cc26dab8df29af029053562b471afc8885331. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CALVP1946838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b08e1f5b12af1fcfbf872da3b453973593504f648777e2b336726341b20915. 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/USHM82437008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3ec9178e19aa0c9fd1beada6cef7ffa461961c01035299df2fe809ccf51e15. 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/USHM22413146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95c65a1aaeba391ad3397d86298ee38efb2779a051d4135b838f45c011fc813. 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/USHM22409260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58acc006815de8fb3265841996e2baf721e3ebb5ace5ed59be4c5555abc08cb4. 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/USHM22407918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7419d8a230fb5c2c41973b52499ace17369db266cebb8328128d9331591660af. 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/USDY42497536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6668398a7352fe4def0aec3be6329beba693eb9e4a1e68d1a04f5eb9c7429b. 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/USDY42494637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42558a3dd8b76fed5eac549cc3cb10a78b9747e2dcac605ef5865ca00501d0ea. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:43:09Z), 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/USDY42472430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4f8c86dc23070e0c34d73d27c75df2cad6492382f74f50ddf11eb3a44583f6. 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/USCGJ2485827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6e1e0184bde501fce029824e8d6e3c6c5c9e27baad21eaab5c7dfffadd8ce2. 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/USMH92398973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c557a9a90ac128940e61e96de662ddacf50de65499ff58762edad676925f57. 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/USDY42373003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1660be2c9bfae26ccc893f7c44eb994ce5621fc63492374a539321e382bb60. 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/USHM82365838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2d186240dcff1e0621ff8f66bc7d87474042919ed13559edb80cac80daf81c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM82319779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bcfccd655a225e25cbc1c9d623e69b44e57bedd4884783c04cd68ff5a565d9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM22351424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8496fa6012e0215a41960e3881edfd2927e2ecc9e224064359da09459f50b2e9. 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/CAHQJ2319666.