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 0x6ee038c520a2da77ebd5cfe56820d332b2adf4782fd791757cf8457a1075c988. 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/d0817f98-f814-497e-968f-71b1ba43634a.json and https://artists.proofprofile.net/proofs/artist/d0817f98-f814-497e-968f-71b1ba43634a.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 0x5250a40a23ab6f17844092f9588514094550a0e3b0ad31f5083a199c11efcca4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/MUKD00000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f0966c5ffe635b7caa367688b81f6a34f2d0a0fb14b3967ca58c3abb9b887f. 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/MUKD00000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0985c6bf6b297f18f421ad8e130b401f0ef52e75fb28d36c04c27e17463bee34. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MUKD00000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026107ab006c1e7da54a540daf3bb81aa362e5d67a8e93f146da9e46f6aef976. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/MUKD00000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1c5e946f0c2b18b77ee36eaa6bbfa4f1df8ff5e6af03e3257d10dacba6cdb6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/MKUD00000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2531f8e51349e38c23bb9f73efe4fcbbded8fedc869b7311e716d0dbd8e89b3. 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/MUKD11700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bebb991bc399c8058f0fb69b4cd51e746117540454d6229249bb983f04047a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MUKD11700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf46a5f98b61cba43cef4b0aee52048dccf00391f379075042fef0244e1a22c9. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/TCAEC1958389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2531f8e51349e38c23bb9f73efe4fcbbded8fedc869b7311e716d0dbd8e89b3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/MUKD11700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf46a5f98b61cba43cef4b0aee52048dccf00391f379075042fef0244e1a22c9. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/TCAEC1958389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6327d6347a996b924a1580fa3a52cbad55f526552f352fd33f77b96402b93. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUA1D2006990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc0cae0c6922f95985d77ebc22c3acff357918d1f44c4371956f7c770cfa2f. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/RUA1D2006996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fba74ea91adb7a21776d4145930f0834af1b0b9a194f3ab212cd6607721eb6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAEN1959442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6327d6347a996b924a1580fa3a52cbad55f526552f352fd33f77b96402b93. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUA1D2006990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc0cae0c6922f95985d77ebc22c3acff357918d1f44c4371956f7c770cfa2f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/RUA1D2006996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5561147fecc8ec128518f5ddcf5324768c39089098bffa0c020cc4820e82426. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/FR59R2111861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfe125cabbcbf8382d9b2ccfaf747bc273eeb07aa3ae1f5fa7685af1dcf3896. 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/FR2X42173097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78ef0d2c4417771160ae9ce19203cfbf8b2606553d45c9e01d2e039d6742fc5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR96X2102168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84537689884ba18dbc1f07c838631b00f89ec95477470f8f23b51dea415a76b8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/RUA1D2159694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ac6356521bd309a7c2dc3e2603a76557de9b637d247794b6f03990bfae54fa. 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/RUA1D2207914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207cdfeb988dbcbca4b811b631a75e544af2881fa5277d053ba7b34828a09273. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/RUA1D2116788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ebe32aad539589a99e028ca473a1e098db34f4c3b0848bdf2d07b7387384c6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/RUA1D2166658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84537689884ba18dbc1f07c838631b00f89ec95477470f8f23b51dea415a76b8. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/RUA1D2159694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2aced9e59235ca71294f0b545e014d76ec1fca0b0032663679f8ea7119119e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/RUAGT2225301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a667faf275940e973c3850db02aeb3f8a574e74aef69d72cd1b611cd8a9796. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/RUA1D2315571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4ae6cb37b5d4197d22ee493012e0458a965c06100fd358d7a9ab13b059cfbb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/RUAGT2338806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e5b05a6d509e5dc02af68a67203e41ab022dcd129412f0f6cb51bb6b6b21ec. 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/RUAGT2358110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd905276ce72edaaacf2bc92df9769e46945db35976ca1daa62556c54208897d8. 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/RUA1D2403247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca162ad7cb015d46f4a47ab0905c2b061c4b7ce60fd9963c9ed25ddb34b2248. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/RUAGT2453743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7732ac8283889f73569ae54c65bb43c95891c4a00c709bd2bae44d59af2769. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCAEH1954902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7732ac8283889f73569ae54c65bb43c95891c4a00c709bd2bae44d59af2769. 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/TCAEH1954902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dfd7aeac14c5978fd6d20b0e4da6483937bc23bfb18b9cc334288c7d638a3b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCADY1830113.