The Five Hundred, formerly the Alan Ladd Building, is a building on South Palm Canyon Drive in Palm Springs, California. Hugh Kaptur and Lawrence Lapham were the designers. History Completed in 196
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 0xf6fc26ade94487c7c9d209e1094f9b50b68d20293ff70269e65fb39bfe6993ed. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b6c038f-fffc-4d63-9412-f0f9d36aa55e.json and https://artists.proofprofile.net/proofs/artist/5b6c038f-fffc-4d63-9412-f0f9d36aa55e.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 0xa754c9a2bf27f633c1a08fa0f07ac4f9ccb03aaa870d95950a6855307be09d35. 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/DEA452000990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db619074f50e19df3f01360f7e4776fa1247228aeda4f1a1c7c4ab6f7c3156. 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/DEA452002900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e221bdcfdffd5b8a72cdb20836cfaaea4ffc0f6b6f1c3c524f9beafe88a147. 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/DEA452101650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e3c632f230d84e8e556cde8628f5ec0e39f2b6726bd72153cc4a41e87033f2. 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/DEA452102660.
Walls Of Jericho (feat. Andreas Bjulver)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e0195ea0484584292954517fbe7b93a49f5b6837d35e70631a6d2b7f658a3c. 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/DEA452101660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb43ab9953e45e4dfd5982af3c5aa7da43124718e690a474f4fad65a5ebba6b. 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/DEA452102670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e572804c5b9ada80b09fe813741a2e5db1a6cc123661ab7cefff94524bde42. 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/DEA452102700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cb6c08b9fb1567d4d6c4eb3fdbc729f57b3742edfd82a9d66b23d4187656b3. 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/DEA451802870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411bdb1939d37be211df6ef45c3bb393f2ee8a3ac7e1be389f7aa970e20441e7. 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/DEA451802880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e8969be283983a931e64f83c78c238bffac69f204e42cac28387e53e926979. 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/DEA451802890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec0201321f167ce4507db92fb451a7dc2824db9fb5e3570d3b958c15eefa0d2. 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/DEA451802900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b8c652b0f22bdacf09c827be9aca43481a315788111fd4ddbcb5a3dbecee7c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEA451802910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e1d3d0bd00fa192db60593c855f905576e40185fab74cc86e6553185f8e645. 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/DEA451802960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e0195ea0484584292954517fbe7b93a49f5b6837d35e70631a6d2b7f658a3c. 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/DEA452101660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e221bdcfdffd5b8a72cdb20836cfaaea4ffc0f6b6f1c3c524f9beafe88a147. 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/DEA452101650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db619074f50e19df3f01360f7e4776fa1247228aeda4f1a1c7c4ab6f7c3156. 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/DEA452002900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e221bdcfdffd5b8a72cdb20836cfaaea4ffc0f6b6f1c3c524f9beafe88a147. 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/DEA452101650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db619074f50e19df3f01360f7e4776fa1247228aeda4f1a1c7c4ab6f7c3156. 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/DEA452002900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa754c9a2bf27f633c1a08fa0f07ac4f9ccb03aaa870d95950a6855307be09d35. 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/DEA452000990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec0201321f167ce4507db92fb451a7dc2824db9fb5e3570d3b958c15eefa0d2. 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/DEA451802900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411bdb1939d37be211df6ef45c3bb393f2ee8a3ac7e1be389f7aa970e20441e7. 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/DEA451802880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca775a2143e27de4dc10057cb94abd51061752ca2529db6eb38ec27e23157686. 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/QMPKX1714594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746a09f03a5a78677cb4bd14f96965345e1d1a7aaa43e0b88a3afb9e6d4874fe. 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/QMPKX1714595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0293def8c228d61cf74393e6c4818f069dc1be014f6d8c26057acdd0eda3ba. 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/QM2PV1553776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afa5fad4274426563727ed23702758f784fb8f37f3fdae57b8b7d0c6897677d. 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/QM2PV1553778.