thumb|The result of the 1995 Oklahoma City truck bombing, which destroyed the Alfred P. Murrah building and killed 168 people A car bomb, bus bomb, van bomb, lorry bomb, or truck bomb, also known as
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 0x48a3981631fe6ccbf80390da170e781f5fb8cc089c7ad989c19391664f85b8cd. 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/0eb0924d-9186-4d5d-ba98-02aceb78c1f4.json and https://artists.proofprofile.net/proofs/artist/0eb0924d-9186-4d5d-ba98-02aceb78c1f4.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 0xd67f2e5df35e416a39d82483b14f3fb19cf81d19bcfb6c35360cd68391bcd6c2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/US2640776501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144d4b10a3cee7c22038fe936f2f1e890e0f334832bffb66e3797424bfb75cfe. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US2640776502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fc9adbba34076a7f3ec7858a6897ad45225e3e3f531a63c0614f7cea5d1895. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/US2640776504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a54dce128b26d7398903192a9945d26a5a87b360b0f667376328a60ab00254. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:30:25Z), 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/US2640776505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac617ba7b580ede1fc58c1c9fb3a5926ff88c6109ba2880d51d51797221a9c9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US2640776506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1e193a6cd21868bec0e8780014ba3e5844cd7a9ee404f41cf41892e318ee01. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US2640776507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee4bf2a641fd127f02b3bc149897dce57fec2b694fc370e12e9df70dcd579f3. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US2640776508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad74236a17c701be9224591771a78da1acf97aa1fef661d2cbba396cffe35236. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US2640776509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0113a0160e0606c0d3cfbefa3e81f07ba2cd0412bc07044b008ef40598cd1db7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:30Z), 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/US2640776510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a26e67ebe19401c8aa4089e9ee22e955835c534cde623dee3293f1fd33593ab. 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/US2640776511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106fee0503e3230fb577b56d8adb6b78f4f3ef3d8b25030b91835ec565c534f0. 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/USHM91221905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d14572aac500e007799b6633a4683c564a5ac49c0bf6738b6f24fd01306cf8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:02Z), 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/USHM91221909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3c7068e6c5ceb2e0785a678cda8adcf878a26361159b8cf77197960bfa7d19. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USHM91221910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9006bb7df44813d4eaf16c2918a26d8a44b1534de58252f140e56a7f9a9997. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM91221911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cea62fd02afb27fb0b17b03bcf58ac0e19242ccc69b607afb25b8d64f9ccdb. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USHM91221912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4278eeb2375519b517fcdaa378cedfd3a778f3704527fe5fb51569930fd07e. 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/USHM91221913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2061c5e5c24e43abb9dd24d1bb56df7e0384458e10b3f57b152db7b87a10e15c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM91221914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451e535f39078fd5a0752bc5f20490f0f2444043b98f345874f8b3b8a27d8b1e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM91221915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77d7b1b28804d10936662744d9a65de6fba41f81867efd3877b5a0c9616be14. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QMAAK1973945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6043ac1d5ba03301da7a180df266a977036ca208e652d822c905e6617d39e9c1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QMAAK1973953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa750cb936e2b0e68755a1233449c785685f9fb423b0a11c95b27f4967e9e6252. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:27:22Z), 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/QMAAK1973954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf632173c199099349da0e234fbaeb7271ed0ac4f48aebdcb8af9ffe79b56d22b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMAAK1973955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec4bf140641d40c05aaa4ff0d494bcf707ad22054ae8520259d8ad8b0a33a7f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QMAAK1973956.