300px|thumb|Colin Self, Mayor Gallery, London. December 2015 Colin E Self (born 1941 in Rackheath, Norfolk) is an English Pop Artist whose work has addressed the theme of Cold War politics. As a stud
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 0x711bb73cbd27f80183f3d4eedf57cac03e5fec429d76841624dfea91848c9fc1. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea4badd8-e984-40eb-8f6d-230ad26eb58f.json and https://artists.proofprofile.net/proofs/artist/ea4badd8-e984-40eb-8f6d-230ad26eb58f.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 0x8c4c74fcd79ab5cfa44214232a65706e6e980d238f7fce4858115a0dd30b8587. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US6PQ2400130.
respite ∞ levity for the nameless ghost in crisis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9804959f432da130abe39e66631609b06a44780a2bd0a1ef25cd22bffbed0b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US6PQ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a75e5e3229992f7f5d89e2f480dc0bdbb645507b00835638d62e6b19a18c65. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US6PQ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a257f708e8234a1b84afe042746c0bd4578f43a3da8ae041aef847bfe14b0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US6PQ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4eb9272247c819a41d9ecca5111b9a0b33a3827e9d7d8d78d200cbd306be562. 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/US6PQ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a62e156777d9247f9d329bf94b8564db19ea7b35f78cb7376ffc7f2bddc8237. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US6PQ2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dffce8532747b9b90c29cc4dc6921d37bd3005cd0a9528d6cca55304e040d1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:54:10Z), 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/US6PQ2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe638fa834b346ffa0724b3b2c54bf42ac2cc659c109905b3a4f00e2281105a6e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US6PQ2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c0c71820fb485c89a8c8573ef036aea9c9f3be1ddacafdf4145be6adf58107. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/US6PQ2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc159f703da01ea21a6576dfbf3a80ab2ba3f16c7b789544d11b8757830406636. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US6PQ2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6b0ccb083fe0a002a83039a52234a37b7f2c177113ac978b7aef33906d27e4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US6PQ2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e22e69343ca0c13d382d7227008e6d4d50dd5c52e35aac43222b1c8cceb0606. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US6PQ2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd02815ba839e7e87f837b3ba21f9fc6678011ca56b657f619589cb60d0a6940. 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/QZTAW2207322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5608e2116ac84489821a0089bed324c40480276f9e7853cf295c706234edc3e9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ISW212101302.
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 0xa95d0bf686819e3080044c07abe2ff4af32016297064bc24dea36f9d20fb4173. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZHZ51969874.