thumb|300px|The former geographic counties (1889–1965) surrounding London: The term home counties describes a number of English counties close to London. There is no precise definition, but the coun
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 0xfeb28bb495a903275c5dd32eb31b2072aee53aa36256b3d7ca5e3cef0d18836d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b753ddf5-b48b-454a-8409-6beb4cc90ede.json and https://artists.proofprofile.net/proofs/artist/b753ddf5-b48b-454a-8409-6beb4cc90ede.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 0xe67b27b320338d893ba70915b0d214b4b6a34fd69a817dc8563b6ae25eb50788. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKG3X2200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b8f56f28304441e99705b683e1fab35af8f7e7a40f0fd4cfd18e1271a3c127. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKG3X2200227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab29625fa6e04d874220c926b47562b704352a6caf56d6c51d0726a0abd560bf. 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/UKG3X2200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254a79f0ebc99ab710d3822d3e72ae0ed3c0e73cf00befcbc8463f1ec7eb67d3. 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/UKG3X2200243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8960ec40fcd8d74a4075f1b3e62b350d2647b188cf1076505d0efd41a5246158. 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/UKG3X2200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d8b66709d64377ef7112c525c82429683c98efbe99dfdce224e0c34a5b8f4. 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/UKG3X2200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9d6543555f14811ebce189eeb49cc6b5e04eb7e9dc90aa2ce170d1a36cc3af. 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/UKG3X2200245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5489191ddf4dc616ea86da72b847276fdc81ec5cde7faaa3e84f4b72f26707f3. 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/UKG3X2200246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe1aa76d44da9a1b5e68acfccd651b7bedb158e0077507238c86b9a9c313934. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKG3X2200247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175ae40f57aaea9bb931901a80a3d41761d8bd826acb865fbf6bbe7418f3cee4. 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/UKG3X2200248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254a79f0ebc99ab710d3822d3e72ae0ed3c0e73cf00befcbc8463f1ec7eb67d3. 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/UKG3X2200243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9d6543555f14811ebce189eeb49cc6b5e04eb7e9dc90aa2ce170d1a36cc3af. 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/UKG3X2200245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b27b320338d893ba70915b0d214b4b6a34fd69a817dc8563b6ae25eb50788. 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/UKG3X2200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b27b320338d893ba70915b0d214b4b6a34fd69a817dc8563b6ae25eb50788. 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/UKG3X2200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d8b66709d64377ef7112c525c82429683c98efbe99dfdce224e0c34a5b8f4. 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/UKG3X2200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b8f56f28304441e99705b683e1fab35af8f7e7a40f0fd4cfd18e1271a3c127. 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/UKG3X2200227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d8b66709d64377ef7112c525c82429683c98efbe99dfdce224e0c34a5b8f4. 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/UKG3X2200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b8f56f28304441e99705b683e1fab35af8f7e7a40f0fd4cfd18e1271a3c127. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKG3X2200227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063c97f19f2f47197fbdcea671306184269dfdfce3ad7004313295f6a272a85f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBZ522024501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3af415b59057acc907c61a5bd6d760c8bf06ff2d769b7a5c2c8b75bed2b8c4. 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/GBZ522123801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87911d124c2d8d3b58be44cc215779c87a6843e1df5842054894bd12c1fa5af. 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/GBZ522024514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3af415b59057acc907c61a5bd6d760c8bf06ff2d769b7a5c2c8b75bed2b8c4. 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/GBZ522123801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445e67035a0760472113a55fd9b9a80f8a9c4b88a7c0e3a647e592f64fe56f28. 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/GBZ521921701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bef5d88f9b35508b33e61cca31b1167cd511af823303f5b57560eaca1f42f7. 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/GBZ521920407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c422beca37931cf2e3fb214e7cce93ef1fed430f322d32d147ffe62dc6089f. 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/GBZ521920408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5843514b159de942a33b333e9af4cc215dbd6f7f002adfe80cf8121e1446bdf9. 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/GBMA22074214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2968931bcb123d59098d69a0f64119e6cf92e2a22d45abe3dc3906b952125d94. 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/GBZ521920402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939486bdbf97920b576649b218fa98b163dcd117dd7f6a3288da280c393fd523. 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/GBZ522020494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd0a46f171132d5bb7fdd4b27ebcbbb3e8718a8a4140c460ef17d45652488b3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBZ522020495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2968931bcb123d59098d69a0f64119e6cf92e2a22d45abe3dc3906b952125d94. 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/GBZ521920402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5843514b159de942a33b333e9af4cc215dbd6f7f002adfe80cf8121e1446bdf9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBMA22074214.