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 0x6258eb7811478f536d3e4cda9b1cb41743569e1f8bdcc7b693d5f3176f3873fa. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a473cae-8774-47f3-b7c8-b057feecd51d.json and https://artists.proofprofile.net/proofs/artist/8a473cae-8774-47f3-b7c8-b057feecd51d.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 0xe87c87ea5b2b463dece40079b2d5b0e7848638fd43c325b61633cb4a6322f8c4. 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/DEPI82324813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde16330fbb6f5358874a160e79a9188f6646aa715c1a6d29491183011367019b. 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/DEPI82324814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81789c0471d919e81161cf615fe709d56a9ba9cba039c06b2db32ac9c0d0900c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEPI82324815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbee6c5ad8013e7f7712b44b83b312b41a42f2e8a29ce511842f69401866a75e. 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/DEPI82324816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f75d260dd77b418c2f3c01858f489306f240c561354316df5b3db19bdfcecd7. 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/DEPI82324817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc742c9fd8fddd59f6a4afc6a47907aa0bab9284333d1e5a1aeb0bb27884956bb. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEPI82324818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c01a5ec42e9908c97b239604749cf5fedadef71c595857c0db259f16665c3a6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEPI82324819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240805c0a9f6bb51c4727d0daa3d08942d79a8b414b47fbe5974e568db0701c2. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DEPI82324820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aab4ab3cdce51e8761c8497aee5a9681bf62d4a258833a71ae563f2194765f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEPI82324821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7a4e83d495e88249757c62c133afa3cc52399f5973f8139449169d0f95c6a3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEPI82324822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb57900758294565d707d08bf348ca4a4b7de95420319ea12e96ffec2fa9882. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEPI82324823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f3fde69d3c86579a7a2b4cc4877bc656125968f3f2f874afc3e53cd42b4398. 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/DEPI82324824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a460780192e20fd2ce1f3589811a13926b95968bae7f3cfc04aa54f89b83c5. 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/DEPI82324825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde89646fc081598cdc1c3d436fef9dcaffae4888ad4510165d0b7f53dd81de89. 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/DEPI82324826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d44e5d81dfd50e2ad32873ecce5e4e0778b2fc4d4e010320fa042cd1c1096fe. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEPI82220457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c627e6c35d97b1d44256266f6197d4c16cfab9956bfd75eeeebcb93499047b. 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/DEPI82105724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b786851eeab42f9e367bf4eda7975ee744b8ae8fcbd97be69e82045b3c50070. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEPI82105725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9ee616e0463d4f78e1e309e8cfe7b542b0e5486d3e46b069cf7fb15f20aafe. 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/DEPI82105726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae28082497fa3dfbb5c86741ba58eb53df5efaf3c55dc02c21f82ace676d3f8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEPI82105727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22617552ab84d4d5b89163896c988a3390815f20650686e81659dd60a5346e1. 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/DEPI82105728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b55c567e4500f62e08e3508fde9275a77ddf2670d43ff9c5826cc695227f95. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEPI82105729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c91cf635d021781737fce4c8835bd26de8a4719afeeaf03bf12b66235405320. 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/DEPI82105718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33759f7b9b72b02d69d571e15f8ba8896bdd9a45b6e420565dd9434b56150f9c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEPI82105719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c66aeebb8b061bf0f12c521fb83f987866344cb54499b827e605f844f78d01. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEPI82105720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c46a85c02b932aa5343f235d28981b134ae8abcc91ed6e73dbbce869a0df8e. 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/DEPI82105721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1448b9536912a5ccd12b185ab1858e88c60742681cc10a0090108c0305139a. 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/DEPI82105722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240b4f9522e0e31133bb9513bf973063f1f5e1bad71e91a9f7d28f89d8a505a6. 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/DEPI82105723.