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 0x6722cd5f3a577eb078213a6d2977635824d60e86610e341feeafaf083ebdc45d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ac85f1c-a8a1-4070-88b4-0201ff108939.json and https://artists.proofprofile.net/proofs/artist/0ac85f1c-a8a1-4070-88b4-0201ff108939.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 0xb78aa4389ff7132a066c28911b6fabaf521640fac72fa058172b670954c2dbd4. 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/TCAJA2481934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1195dd67f353000a2f19215ddae4ca6bb861d56017e7aef4d1626d0c1429f13c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAHE2311700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf805e31ce036c1693c73612ed98f804617f659475f1b2b559356b44e06f8e3aa. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:17Z), 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/TCAHE2311722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b88be85dd8c0af08d6709c0064eed1dbb3741998cca8502218d8c21aa5ef91. 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/TCAHE2311737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4be5aba3e21f408409c66ff2bf712d69f27bdc82a213a025c28726c59327bc1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:32Z), 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/TCAHE2311742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924bb5709b7f12339b4a15ef570390b834e7a76e2e401ab073ab3bbbd0f10a14. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAHZ2439710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dcd03f585ae2c14cda932d18a76e2812988f09404a49eb2b433b76d4273b66. 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/TCAHZ2438514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b91eaeb4fa185f3def607c1b6ee11217ecd227ff7c9d0208ccca8b618db3ad6. 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/TCAIF2481000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0a6cd83c2f951a576eb5c044559da529e329cf040524691d858b03e6532c10. 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/TCAIF2481160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f1a4782525036d3371e2724038c57834d8d544d7e2d1654102b231c71e4c2b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPLR2416191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8979cf684232b5bd84b4f5b23dff1e4810f61a844f8678a4c9166651ce0ca3. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/TCAIN2498895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5816cb95f0484797b880c119936b66c70f1c67348deab7ff3977d2bbd4b56a89. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAIM2499284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbef266ff7b6ee6475f2a609fe6055dfe2dc8dbd0b6d0db8cc1688d34e415b87. 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/TCAJA2490134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108a38c8bc953873a2cd04c1204b37da58fecddd1687c0ed656ad01b74ece97c. 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/TCAJA2490165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e9541704744f52b221335c320057d721448157cffcb005bca05f80d5fb7907. 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/TCAJA2490175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa0f6bd32226efd6ea6ba42772090be24a65bc81d4ac9e97faeccad9acbec87. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJA2490191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a231ad31411a11c99b4ae9481163926dbbc3545933fd76663f6b3801e05a589. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAJH2588742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e138d2231007944d635fe1b377f6dcb2d73557078d7db066bb641b53913685. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAJG2570523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2915f0bf8286a33a0e8b7a8902e89d3880216a58fe98b3cd8b731a9d2b65a266. 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/TCAJI2575966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aa1219b65ead9f3fc325d97f229f00fee880091366815bb3b134e4f155c8d7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJY2579632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd8d221a310adc86e19820a1112b288ab06d0aaed66a06682da9c24c929fa36. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJQ2554230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ec9b82df52e9391f614f7a195ec2d91e100d5783c4f76c06476e1db464d154. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:29:50Z), 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/TCAJG2570540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feee2bfa81898ccbc7b8ed5a262091d3a43e9ad5aed4800da167d4ddd36a2ac. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJG2570491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aa1219b65ead9f3fc325d97f229f00fee880091366815bb3b134e4f155c8d7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAJY2579632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028a888b7366d1966a59a46aaf0c3d165f427cc12e6d7fe0164abb6300068778. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:49:25Z), 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/QT65Y2505474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd8d221a310adc86e19820a1112b288ab06d0aaed66a06682da9c24c929fa36. 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/TCAJQ2554230.