Jerusalem is a city in the Southern Levant, on a plateau in the Judaean Mountains between the Mediterranean and the Dead Sea. It is one of the oldest cities in the world and is considered holy to the
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 0x83321a153935e773063177f2b76b00274789e612879c167ccee74eb0362f6076. 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/299a9b2a-d521-4023-8b77-67363b620efb.json and https://artists.proofprofile.net/proofs/artist/299a9b2a-d521-4023-8b77-67363b620efb.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 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 0x9f899f46c586c56eb1ff05f19f85241aafe319b4e441fb9b29e1a09e692ca151. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QM4TX1774992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45db824f1b5dca6baf53b08715fe07cfbb531260bf3e68523a06eb5b172cb5e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM4TX1774996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbef99078d4d85121adc05d437d837738b3c0599fb118b219a55fef94076580. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QM4TX1775016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe587441d7b2b586d29cec75a82afb7f1deea05308da498f63de24122536dfa62. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QM4TX1775053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724d85bb55f0271b3e05b4617d0aaf9cfeaa1eeb6122dc454c3cdd537726be78. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM4TX1775054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972db335d3abea8e2caf2aa4335cd52f4f0982c929f1f4e173a7f5c6a54de866. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/SE2HU9300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78141c2e5750aa6d26d1f4ea2aa18753f66c89c4b51ea37efb1180b4759c469c. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/SE2HU0600314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8724d837df7e7644705b5435c7e49e81aaac7d26aa535ff8c8668d3b88432. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE2HU0600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3126ad57ccf3d1d050cb4dc6ecc97c8cf93051edb8614d863e198b3bcc91f5. 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/SE2HU0600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139050b997a5bda26452cd06576f3ea960abbc150aaeb749b98caf8712090df7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE2HU9500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb37fc6b8020fa731d10be8d83c0775439e1999dc719e0ae84b6fafabe81664. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE2HU9400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebacccca7b390905f8829a76ee6df8afeb9609c46d451d96ae7fec590ccb907. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/SE2HU0600114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972db335d3abea8e2caf2aa4335cd52f4f0982c929f1f4e173a7f5c6a54de866. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/SE2HU9300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d0ea3b94588c230e1f690ec4ec18cfea22f0b2d2b4b2cc22e22b88673b03bd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/SE2HU9400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c13c9adbcfd98f5c9325825b5c585df77be21f73ed73cf8b2e939a592aa10b0. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/SEYTH2301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a794fa07472af730a7eeffd7d09822cdc3e1dcb26e338c456d0289933d98c0. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/SEYTH2301303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949b9a7b2f4fc8c99909488a88f63684330f616f837aabcb38ae532e3508d223. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/SEYTH2301304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55bf6545829b061df798d5f6817b45e6cc27d7d5adecf1b316a680c6b0bca36. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SEYTH2301305.