__NOTOC__ Marias or Marías may refer to: Places Islas Marías, a Mexican archipelago Marías District, in Dos de Mayo province, Peru Marias River, a tributary of the Missouri River Marías, Aguada, P
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 0x80f2fd1101008e3ec4d74978368663969644b8f874ed679ed241ccc3ffe1214d. 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/3393ca36-a246-49d2-a68b-1166cc64e89a.json and https://artists.proofprofile.net/proofs/artist/3393ca36-a246-49d2-a68b-1166cc64e89a.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 0x897135791ae19ea5e470c7e26aa2fb55a2f38df477690b33411cc2c73597d10a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZPJ32475618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7db1f7e7a185597b54424ef08924f56f0553964d868bb79be0ad65fae47b10d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/QZPJ32475619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06843826eeb1e0c11de2b8bc9c28db72001d667bc4b2a8e2e7461ed54f3d1d92. 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/QZPJ32475621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a55a1c168b67a54b82411bb102cfa37c57903a873f570de70f0cedad9f5d38f. 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/QZPJ32475623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be646c38b956c28facf9a311cc84899619d24bfd204abd2734b0231f0c0e6d4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPJ32475625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f651782809a58a81e25bd0df6062202c54aac7b9fdbc38b412c1fd3e3885cec. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPJ32475626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aff8afc0925c1363c2a4fd771db10fa98cdad84a5386ce2db320624ad30e283. 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/QZPJ32475627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f49457aab29da8076d3ceb0728ab758bf2e363575793f49a5d4ad2b965e2a31. 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/QZPJ32475628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4a0b563075fa434ad164fe1a285d6a1578cabcc46003a220cd08e557232b8a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZPJ32475629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5daff27fe64af337031900efb4a3323f3cb55686fdd5855fefe14b6b71b3a2. 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/QZPJ32475630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08993c13b958ef300b3fc2d01c4dc30b99e02bc5cb13e6d4b31d626dde94a5f. 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/QZPJ32475632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4023d99f69ab91e67625ab634173d913deb2228c789f2d83e36900bd7d63c6c4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPJ32475633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae65e063f621a3cd41d54467680161be7b384643557d04b1560499902197d0a. 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/QZPJ32475634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a56728eebeb429addc1b7fa60b8c32c2b0c996597dff1c9a9c201f7dd0c900. 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/QZPJ32475635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7717d0ff208365a89a5bb4df31f1e744a302c41041f3fda0db42efed00f4bb3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPJ32475636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59301837221de56748b14082931284c1e1655bb8a1fd5be59d833d66b79d0499. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZPJ32475637.