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 0x15469f9967ac2b4f1845baf34ab8c942489dd8c4d73e50b02cf017e0f74c4cea. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7039c644-a752-4065-9980-bfe4ab032efa.json and https://artists.proofprofile.net/proofs/artist/7039c644-a752-4065-9980-bfe4ab032efa.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 0x4028fb29c7e5689e2e6ffb5b11e13704abaf954338edadab61ea5430fed61fab. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:55:51Z), 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/QZHNB2279359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93ef3e62edfae008b514bf8b45c00eb57e10fd7ee25ee1ff2ac83e1da5f6782. 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/QZWFE2344135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a3624d4cac63aea37faf9c0dafad3049c0a54cde4cf5748adfc3a6b796add2. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:54:51Z), 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/QZWFE2344136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9826e7f04ee6b094fffdf35283fe45e77de822b6da0cfaa9153005a2a6322455. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:15Z), 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/QZWFE2344137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4125ddca0933a64ce38df0a78da38fc0881e011b3ab73acb859adc6d29c23362. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFE2344138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210498eda9666771a2f904c37e428ca3115312dd656d549999109056d1b7d3a4. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:40Z), 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/QZWFE2344139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b8ddde4157cd39b19371732fe426b4f4336d71be394b0f799b427bb9a2eb8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZWFE2344141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ad70c4c0a200ebf70773f901bb2d065f100a084662007c75e680a847813426. 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/QZWFE2344143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c7c009fed89e32b150a5c97ddee86aefd6cf536e3892639168842c4d67d7e7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:53:35Z), 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/QZWFE2344148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11df34ef14069d118844d8e98aa745faa457d5aa0a8efc72c1f39d5fdc8d3bdf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFE2344149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce331c2300dce355705ac5e7180fd3e98d0c1cc6037fe873eb0a23dc3b6e39f. 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/QZTB42473724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb703595dfc88c3072e27e5fcf86d72e486469cc15bde819d83aadfcefe2f4822. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTB42473725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88555e1434fcb205842d217156853c2966219dbc7bfea0406c5fe551018d7961. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTB42473726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3539e71d3525252bc3a0def17d09fd3dba4ee66cda33de3f7565df9ba7cdd73f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:08Z), 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/QZTB42473727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc6d7d4d474c73d5cdf75d6aa95c79c90fb699e40695a28cbc923013ee665de. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB42473728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f8ed8130781f3ce18b01d2affb2bb3089b17e4f005ecc0cda9df799cfec98b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB42473730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa485167806609fb93f3b5ed9fb48285d93875693910014f07deb382eb49b96d. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZTB42473732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18b014247a8097e1864d7c5d1baefc9a4bd0d3752739c1f74f11440c5e50f7e. 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/QZTB42473733.