Barajas may refer to: Barajas (Madrid), the district of Madrid in which the airport lies Barajas (Madrid Metro), station along Line 8 of the Madrid Metro Adolfo Suárez Madrid–Barajas Airport, princip
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 0xfbea6946eaf3eda63061fcddcefa3db4943de0fdce8764d8db90251b07694c51. 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/a6c31dde-d170-4515-8f66-fd70ef88c002.json and https://artists.proofprofile.net/proofs/artist/a6c31dde-d170-4515-8f66-fd70ef88c002.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 0xd05cd62d3b980280977b31a0f429f63de78a3625c621c11e3f6b4b4eb6d676e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2459274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6b85d92b9ed53a676fc58cf89d67b1957161650d11d8bea0d283d3814fc1b1. 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/QM4TX2458752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beca8f0bd2abc97c41c8058dc4cbfe54f8c3b7db941537bc8eab91b2463f1b6. 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/QM4TX2458757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77730be7bc88b001475e1f2bf4051a623f5b2f40ad8387518c07c3a8ee72441. 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/QM4TX2458779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416359ab63230eba6090051863fa5676a2d5fd46293abbeaa120299bb708f3dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2458914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c654a7b2db81ef563f602c434b26ea8adf8f96d930af9339698042c09be7373. 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/QM4TX2458915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945195dab102229197ae9432042a25dcf301d5645222ea8ed84e6f43d95862a8. 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/QM4TW2462997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6969631f937a8bc0b187b8e8b28bc8fb8bc8989e2ece04d0dd29010b3351a. 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/QM4TX2459009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08a2f4fea1fe5df57d16111408967db8eda1e8e56ffd7f55b49f4dc406d166a. 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/QM4TX2459110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef975bfb15b520e4e0b2068f33a917feec8e4bcb2817724aceb39aab89038874. 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/QM4TX2459113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df4164d4319fba7dc35c8e4d50918de0faa3026a854646f47f421bf76826699. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TX2459117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e65e0dddd7391f2df44b4bf4aad10a5a2d42cc9b88fd260ab426bec4be5a4e1. 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/QM4TX2459120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa469af3facac493380f0c13aad07a79afbd089a2c2b6a01e1bd8ce7e45f1dda9. 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/QM4TX2459130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fc07b8f0cef0a8a0e4cb53b68a59cc00d246bbd0b13b4b61609c39bf277a3b. 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/QM4TX2459141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901c235181af30650bccedc57c61a57b1cd840d4779393dc0c70d1ec970ada73. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2459158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3684ab5ae976e9540f6e65beb4b6cce4345ea9c8c784980fd191a8c421f125dd. 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/QM4TW2430473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4dcbee6de73134785c98bf0ca5749d3240b9d08006fa03e901aff387c8220b. 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/QM4TX2441895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e2a354eebc8d57560d8cca4b039866abaa1588c5702e3400bc17d9159fb754. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2459190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b06ba3f7350f4e949ec9be50515a66a350813dcc7bda88d279ae0c4964198ba. 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/QM4TX2459194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1587ce071ab1b87bfebc52829a0a195b11db72822c1027514d3ecb3bc60fb2c4. 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/QM4TX2459209.