thumb|right|Mariana Ingold in Botija de mi País Mariana Ingold (born 1958) is a composer, instrumentalist, singer and teacher belonging to the movement of Uruguayan music, Mariana has been active as a
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 0x07b4b92c74033ca4491cb9bde45a81727f35290119704fe3e62044b23cb9e05d. Chain 2 (Bitcoin): anchored in block 954040 (2026-06-17T03:05:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e61dc9b-b7d1-4066-a5b3-46942319bf51.json and https://artists.proofprofile.net/proofs/artist/3e61dc9b-b7d1-4066-a5b3-46942319bf51.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 0x3f2b87020317bccc6bb37eae258994fda69bfe2b4ccf0d6fa5a2438a78a6d791. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZNWY2242539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fdd88c31c234b2d22bd1b9359a48969dd27d05689d950f7aea5e5be429dbd0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNWY2242540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f09cf41c923359caa504a070c98f83db19f281e53090fd1921ffed791f296ca. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNWY2242542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbc64c2ddabeb3cc1bf69c8fac25631a4d906cf6065ee912d40fd44d5276656. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWY2242543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d6bab26020a5ec60d518b70a479809da42a358283751e21a7f16a9f434e2ed. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNWY2242544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb14715a9098c5c87b172f825ae30a97fcf7c53f67041540f78312e43cb3de6. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZNWY2242545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d928cbce00633594a0fd0810bfdf1b156abf6f5519d173fbbb7c91826fe5ce. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/AUIPZ2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77723d290d2e16bf7eda23bdd8952cbb9bfb466624d53ddb5b89fc713a0dc1d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUIPZ2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d5f3d4506f5d06d9d26a88f74f2d9329c63bdcfd6f8522d20fa8c637d3c001. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/AUIPZ2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dab95e0e55bc64095acf4c375b5480417894a9e1179aa71a62313970f16fc8c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUIPZ2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877214d0e7cb57aabd661a69db2bf5a360256049da77cab27f835f4e545f87fb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AUIPZ2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276f5ca4e96c9411b44c92314fca0ae05b1c276ff822b2977d183e90accd65e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUIPZ2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d00d205d853467f5d1a48e6d79fefe6915382cacd4faf6dc345b393f6f25e0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUIPZ2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906375131e4fba03e3bfeab6f85096ee0a8e97ea43f068797b4ac1d0e52ae9a2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUIPZ2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd6ae4a308e3c2820d2ebe9feb61aa476f160e4de1254f4cb08fc8e6013dce0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZFYY1948171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf9eee65f98ce56e0dca307dc3502bd980e7cd273b9949f090f7b1568e42341. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFYY1948172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fce8f765c78bcd82dd3614b80c9a602e94a09b315ca2dd4a5f86094d7f9759f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFYY1948173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3c1a3c76bc80dcc00e920bfc9550376dae24ae480e74ed44840b1625c41be6. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZFYY1948174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c30c408c6622107a2a1f3f92d510c9043a3c2c6a2a48b5ec585abf7fc04f88. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZFYY1948175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa401697243a4543050dae3304b3586e1b99e92314f137f2e3da5b99b64d14d66. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZFYY1948176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9987e10eb14220ba28a5f5d07193e023b6bfe0f49b4aa9d4aed0d5454588ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYY1948179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98537bac774e7efa00cb78d4d5347e2a93d6d0c6528401638f22ffa676e3df8f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYW1906349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9e00a79b46b4a2073fbc2a5c72eb93fd1220981ddc182d5849af65cee4cc88. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6R21505188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbfcf4e7e7c485ec31fc764cb171317c09991c89d9b75cea14b54e4c760cf2f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US6R21505189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ff1ad5918ecb3bb6f1764bb836668604554a8c59154b74150535be3c550a55. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6R21505190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12b5d58bed6d3b2ec213ce45732dc86505a305c5847ea2eb1f88188611e0ff1. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/US6R21505193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3958f8ec80cc16e06e51642ec864e2015b69ffdd28bbc5878ecb82435c93d6d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US6R21505194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4edd82775e8d38ba375c46912350b2a331bbe4a23ea6691bc5b58268ddf712f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/US6R21505196.