thumb|A 19th-century jail room at a Pennsylvania museum A prison, also known as a jail, gaol, penitentiary, detention center, correction center, correctional facility, or remand center, is a facility
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 0x6cb6201071ca413fdfe8b94c7e6c9ccc063bc9f18c78b9399b5527dc18803835. 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/8ea3eb54-73a6-46df-8dfb-4ba84ec81e2f.json and https://artists.proofprofile.net/proofs/artist/8ea3eb54-73a6-46df-8dfb-4ba84ec81e2f.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 0x3de6290c976ff8ab50e7caab03ab2f8210c20739c7df9bcd9373a388197de858. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCADA1799384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bfaefeab5fefb3b47d384b518dcd72a2eea5f80b0dc6dbe2dc6af5a9548483. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCADA1799388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353303047955a99139b083d94f7fbfc9227301c0ebcf44f89384fa9487f5dd1a. 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/TCAEJ1968006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7251f2e4dc0fd439da46cab5ec6f0e49d29a61da895ccc42c2a6988accc73fb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAEJ1968568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32d7088d59ee6e81c1efbf21b9d5ef42bb80b40022692a8d4d9a9349ff122ba. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAEJ1968646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb446c61499942c1507668da361535e41c0b3e25017a11d243341978013034a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAEJ1968692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a9785fd110d7453e68e55104232011a8685bc45d78a2d5e16721ee41758074. 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/QZMER2149933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a444d6ca1a9e0eacc6b4453748187a47d47b233f55e44567c249e82439df58. 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/QZQAY2369220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aae6d38f41b9697954b355f9f5ba3bb5238fbc12ddfe9ecb10266452277e77. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:44:47Z), 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/QZTB82321424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8fcf0bc296e471be1a5eeeaba898dc65cd994a7127e62569e247596e4aced4. 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/QZNWR2457659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd48de0039505d607a34189ed532a98cd04d12f374db7c1d87c8dd7c434b80bb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZRP52466710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba65e045916c16b08f8adfba1c8fd148cfc42329980ed933db9221884e7e676. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTBC2412760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54d2fe29b95f6a383424dad424aa02f267b17f74fef19fe4e7db12c9daa7bf8. 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/QZWFR2417291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50a120517bcc1cf1eb40ed9ae7b7f824072332629cb8fe6fb3b08eba8394971. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZZ7P2488066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50a120517bcc1cf1eb40ed9ae7b7f824072332629cb8fe6fb3b08eba8394971. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ7P2488066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd48de0039505d607a34189ed532a98cd04d12f374db7c1d87c8dd7c434b80bb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZRP52466710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54d2fe29b95f6a383424dad424aa02f267b17f74fef19fe4e7db12c9daa7bf8. 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/QZWFR2417291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8fcf0bc296e471be1a5eeeaba898dc65cd994a7127e62569e247596e4aced4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:03:22Z), 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/QZNWR2457659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba65e045916c16b08f8adfba1c8fd148cfc42329980ed933db9221884e7e676. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTBC2412760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52e71fb32cce96f5a8ed836ef083df57f0db9c2114d1cd4c91a8559653b0b6e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:43Z), 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/QZES82504723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50a120517bcc1cf1eb40ed9ae7b7f824072332629cb8fe6fb3b08eba8394971. 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/QZZ7P2488066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd48de0039505d607a34189ed532a98cd04d12f374db7c1d87c8dd7c434b80bb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZRP52466710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8fcf0bc296e471be1a5eeeaba898dc65cd994a7127e62569e247596e4aced4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:40:22Z), 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/QZNWR2457659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba65e045916c16b08f8adfba1c8fd148cfc42329980ed933db9221884e7e676. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:54Z), 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/QZTBC2412760.