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 0x706c689ba0cd62b3fd6f984cf13d062218ff654abe30dd84ebd440f80ca4cafb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81d21b06-37de-45ae-a371-69fc522f0e58.json and https://artists.proofprofile.net/proofs/artist/81d21b06-37de-45ae-a371-69fc522f0e58.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 0xbc0f8b0a3e4285df8b2e8f4fdc4908113ebfe968931feef4f078ba6bc2e4b8eb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:39Z), 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/ES14I1645101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8bc8d959c7489816d801f369212e3bebfc145971784e7797aa6340a79d8856. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ES14I1645102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0635a987dfeec847b71c6d4f3f51e74d4442dc77844b6bf71f4af2285e8971ec. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBLPF0600418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14e3249b2b57a8ec21412679be8b25903a24c40774da5e62eac06cc665dbacb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBLPF0600420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a83ee41746cbd1dd28eead611f1fd193562ccb6f3f9358832c519237fd4d82c. 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/ES14I1645001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d62e00d23690a4b9dc619d7b4f5ee1bcc48d90c7cbf417aeca520a6241e6f2. 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/ES14I1645103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e7178909eb78e3ee336fbb42120f1449799ca77d4086bb04577d5c7c10513b. 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/BK4DA2410691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ce8d98190e39636c5caa94597abebc896323af8259993221186a9c9faafd2f. 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/BK4DA2517676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4a5492e4d8363b5206eb2dc934ce7416033fa2e62ac4efbdb9d4bedebdcf25. 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/BK4DA2523889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca05ba91fc3a3b6e0cb73c1d66d3a7eccc7ee31b78a4ade0c5ee6eda1ed28593. 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/ES71G2319000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f72d41b5375593abb5f2db4e5cfc72240977ab21c24d072dacc7c4f12cb87c8. 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/QM6P42169868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72a30ceccad99291411679d5c1c6db6a944e7e519faeaa4e26e1ffa6d89bfd0. 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/ESA012194102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034c5867a5c8b7c2492cc80be7bd87ea90f620dae3c4eb9b4d18492390a10ffa. 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/QZK6H2096650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4934aac8ee4453fc1ffee14ef0e8bd002c4e42c9d201795eebdecf28ab1e7b. 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/ES71G2420441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529271c872dfb97f8efad2a374307c48e5a440543944515bad557a365806df1b. 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/ESA092204076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b99fce272506a53d6dcdc8da8196f7da924f502744c85f3a71e7a701ae2cb25. 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/BK4DA2513955.