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 0xe4ce315afa399a8509a738c3d71b7039d06489b67af11829fe5c0d6871608992. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34442635-ed99-4eec-8029-535e23a78247.json and https://artists.proofprofile.net/proofs/artist/34442635-ed99-4eec-8029-535e23a78247.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 0x5f120c3c0058d09cb436aa80719ecbeac73091e9fac30a317f896dad7449a7c7. 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/QZNJV2128278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65854e4c9d458e41ea4bc637e6af3691702b03bf0b16eae7bbb745b3ab117a1b. 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/QZNJV2128279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e020103c1ca177e7f59722aea147e08c9ed60533275fbc844591f329f8da3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZNJV2128280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2079c6770a48f1ad9d6f213c8c1eb2880ecf3c422405be5c006b9dfffa65f9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZNJV2128282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21b16c936a61840c54b243fa92a490e4c4a5e774a8603c04e615575eed18e98. 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/QZNJV2128283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d1eb983a04eb8030f10c6204168e246e0f97dce6accdb6f1661e944b79f074. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJV2128284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b95a6ab56612804c485bd72fa14f3be57205aee00df8b90907ecde3b28524b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNJV2128285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4e571a87bdba8b77f5b615f1486b27099088686c68ece49e673b47f42df14a. 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/QZNJV2128287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890b9e39ee3323a26f01f88ec07b345c1f397c26d3c6f555241cf37658aff066. 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/QZNJV2128288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14751d65b3c4a73d164be6ff0b74e799df1575fe084ab0656ff2f49a44291543. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNJV2128289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35345e1deb0713fd3ea12c4fde081e2d12e789bba5ebc08c191b83b39bd57ecb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNJV2128291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78371d11452cc6a9e8951fb437fa11865bc9ba47f26e439e57eb18ead72533ec. 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/QZNJV2128292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1104124eefbb9d3ba139d7bdbe473f10b975432b136848abf3cf3a94aaf4e734. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNJV2128293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd8da4c5fdd1d46db7ff84ccc55d353af553db20f6720a0300e75b8f7e4081. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNJV2128295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa988ccf4f09e3b0604e0c950a6b02be5ead0433371d55567220b75d7e7b0d462. 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/QZNJV2128297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8657941e6f46b68400bc273337a46b8324a10d43835cc82d35ab50732b61062c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNJV2128298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c64523b3953745b4647ddb69a2b647b6e3fbac03bd7d8c179e9f04cdd598e0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJV2128299.