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 0x81599d4fdef813685736b22452c3d732c2c51f26f8115c5faf6e79977399234d. 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/b04516f6-26ea-4123-b12e-7ffdd8dd2588.json and https://artists.proofprofile.net/proofs/artist/b04516f6-26ea-4123-b12e-7ffdd8dd2588.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 0x7cbcf144f4956fdcd4a37b3c03ce5c20ad8b540c11e0ceba894cc0537eab659d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCADE1739808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0960a7e147ff0542d747d08edccf915f09c0edee2f22205d0c9f6da324cfd632. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCADE1739809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096b61566feb402aa812f97d7480e0e2cfcef61bdc3faeaf064340a27d7e533c. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/TCADE1739811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa974bddc5a3cb9c026277a2a62523b85ab9d88be69ef27d38476821aaa15ea03. 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/TCADE1749530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ab0d05532278affa160c67c1faabb573200af6a7a4fa6bdd9aa31df034e2da. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADE1749531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11de88674ca45b4fb8b5d99fb22c73aa273543ecf61d3ff082e30a182e1f4443. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCADE1749532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f308c6fc8395571ed5aa1eec8dae0d6e573c5e885aad4b9113e7383ddc6b8d1. 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/TCADE1749533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310dca9c0ac81b478640e58c7ddbd10efc77b2422defda098fd4fb26b962db0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADE1757325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e095a6da6e31a74503ef856f2bf83716b077bd9a3455e8b7226de6fec7b5dc0. 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/TCADE1757329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2cc8eed10866e26ebb2bedfea699ceae89ae79ac2b66ea10a284b7b4cf681. 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/DEPI81900308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aa14a3fae042130d7a56f237eb78005031718ea90209609fc46f69d4fd2761. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEPI81900309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07804ebf3374fcb70a261022ff95445ea084eaaf74557af9479ea6c8c10a821d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEPI81900310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ee5f08b4564c497ccc71445e8971e7f231f83b8c843025274d61f911edb40. 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/DEPI81900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6705ea6acb173251ebf5772a37c832446eb00903d0a1a38b9ecec959d331301. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:12Z), 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/DEPI81900313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df6660d24549cf5e7587ef384e5c2ad330119a96cfcc4776600e8c01a969c3. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:06:55Z), 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/DEPI81900314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa413bcf4693f08c9df5193da39f9424f2c947dc31c7495cffe32eedc6c2dae71. 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/DEPI81900315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2391538bfc485b739de4eb9a496172ceab8faac19dbee7e24a331f5f24b4657. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAFH2019405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44c2c20a85bb01ff4c2339d435bcb9e7f25f5ce6af260e2c67471544544e409. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFH2019391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42927e06002d643c66b8257d195e9d764764711565d2a7ffeaaed926aa82b244. 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/TCAFH2019396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4997fecb83dcdb529bbd2db56ea56682ce01c4fa470ff378354b7a5c9bf9f7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAGI2213742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8f7d3f2ce197da44861f6e7fa32d3350d4d8455274e15e801f6ac0f1a9e3d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGI2221503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7156649e0816573fed5626f2ac5b580d365a2bf719e7d7dac1b7e0184e4b0c21. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:55:32Z), 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/TCAGH2247563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f09d7d1970dcdb67e08e265d60cb13cc56745bac6a998efa1af4da9ddc3061e. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCAGI2213784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1efeff7be263f15e53869f39894e46b66a62be1703412f6b77d8488ca291c4a. 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/TCAII2483469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62614cb82c744df1b5dbba1befa7f84773f445495f73cd097b4f68e342630f3. 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/TCAIJ2483531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f95bc3568798638c8cff5bc230d90c4d7d88e449b2f13571077dc708086890. 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/TCAIJ2483541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fee252f3f42db386326fa561c31e30ad73db9446f6fd6333f15e65cda34eac. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAII2483556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8d7d8b164e2682d8911952548168cca646ec82981ad716b2b4fe5374af615. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DE1QW2507618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5032b9c8d6ff64a22cad55f7d7374c34131932c49dd5775dedd9d5456c666d8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI81503110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a277d83979716922a35ba411fd62c592af776b12ee9f2aa33510672d525b80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEPI81800429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe788f1cea344805906270add97c4a3d27fd30c2ea150e754b5c5e7cb8a33497a. 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/DEPI82431499.
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