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 0x7216f82cca931da9d3d2b03360a58f11503c94bd6fc7ce8237289b8cc95f2af6. 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/37049984-3620-4d52-a311-2e710372753e.json and https://artists.proofprofile.net/proofs/artist/37049984-3620-4d52-a311-2e710372753e.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 0x71f705ce392fc54143bdc821e62705d021febe4aa41e7b55dc6ee5ba69bfb1b2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ZZOPM2105322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1254babcf439a167e42c5dca46398179ca68cf69ac8ed32f9354c268e96bb57. 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/ZZOPM2107129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d238b213226ff64649ee880fc74e15918a1c00f60de5292a0e6d453a4626e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:21:26Z), 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/ZZOPM2117925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d238b213226ff64649ee880fc74e15918a1c00f60de5292a0e6d453a4626e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ZZOPM2117925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cd9c26935227390132eac4a809e5cece34c85eddfbac9136615ade219b648e. 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/ZZOPM2223400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf58250262e0959ebed8d37a09758d08e5576da70685d3da3f44026f723d57af. 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/SGB502250507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ffbf1095bf9d0b2f77b7f9555dd956633e3b649819637ed4d3e6e5449cfe23. 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/SGB502315072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62bf6469e0b82a76934a452089d7d03e5a42c6f4cafdcbbe1bb81def9bbefaf. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SGB502337770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c4ebf8ff90c13077418d95b9b594fd9f1e47b4b643be75bb85065a9cf5e86f. 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/SGB502360032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb310f066b74873a1fd47c1a1e329497660e1d4144eab4895777ae42f7d9ed370. 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/SGB502373045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456b387bcc70e2e4a4dcf44f613b0ccf97931ebcebeb7c857ab2c349b0e9c7fa. 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/SGB502373046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c3beeb1edd64b2a078e9f58f250c95e7dcac3903c603438766cb571079d3de. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:50Z), 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/SGB502373044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4664757071d3520559c4249cc917310adf798d7dddcfac80553ab81b4669c9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SGB502284044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb310f066b74873a1fd47c1a1e329497660e1d4144eab4895777ae42f7d9ed370. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SGB502373045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456b387bcc70e2e4a4dcf44f613b0ccf97931ebcebeb7c857ab2c349b0e9c7fa. 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/SGB502373046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d8972bb4c5b2cf14e4e34edfacd8029d3b0811c0e31a22ee9aa6db47b68d8d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USLD91753911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f5d82074b1c9846a86e16ed8837ba6748b5e86ebfa53d41b820c15ae2466a6. 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/USLD91764687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e8483b00907982eaf1d6ccff4f1b797c88f3b24a7c1c23a3243c07e854ddd1. 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/SGB502594556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03a87ded009eda3407c4925799fb4260d0a832c629b8cde0e01aef87262c5bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYM122400115.