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 0xc61994d69d9b0a24237ca691888522880760820b53ba5dc5332379f3f98d2e70. 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/918a56fd-6499-4742-913d-a14e5cd281bb.json and https://artists.proofprofile.net/proofs/artist/918a56fd-6499-4742-913d-a14e5cd281bb.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 0xe512b2c79bd14aace08bab42e28e4026c370419a63b741008cbb2af26e79cdca. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:53Z), 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/QM8DG1819533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28db01449b611a6e89fcbdb56008c4e85b0af1e89a9eb5161e980f9a80f8b9dd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:22Z), 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/QZH5E2014044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd2675ccb844acdb3d5126b26752a1da24f5f97a62a8e01901baeb67773f327. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZH5E2056666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42803eff6bddc2bed0855edb1a22e2cb84d54346463872b7f71898c51ea1876f. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZH5E2056658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e812dd87e115ae5f74179788979551d415669ba13babb84a443f07a0ec3c2fc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZH5E2056678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609768f389038c3828d97c058fda0dbee43fbde5d32a571d0f01816ad89445f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLRD52010041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadff8a5cb091907a155220b1aaa09a383bcb2646a16adbc479dde43f6377e5cb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:20Z), 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/US25X2102970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21182432c447a287e1fe32c0401889069a37e0735eb638b2beb7b6322e7f0e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:33Z), 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/US25X2102971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf265fdea1698d8ff9f93af76d1478b621423faed6db951a3e4cb4676691cbbb3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWS2182108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd984c941e185acf966a83076d12d8995d008fc9e43b461a22ad0b60b35916a51. 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/QZRP42146519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76202e2ca93ed55b8140f424b96eae7ddeac659546bd2f9da11b81301700fb0e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAT2124260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3c274d8a410b4c93cd13fba8fe3d74e109d6cb96592c7881ce080206fd4cf9. 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/QZFZ72273898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f846b0d3ef98e32886392aa8bb7d5d7d65239d1abafc453630681a0dabab2d6. 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/QZK6K2217198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be0f0e405c82e59d2593b09781d47e396e67368da96f2079e0f25651487b9eb. 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/QZK6K2217200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0430082517981916f78d592dfa671569b64d7bfc2f436cc368952715bfa7d387. 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/QZK6K2217202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b4def32f64eea98bf4fde7f5d2558c76aca06ac09aca0a8c6854b2e8264018. 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/QZK6K2217204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a9fd94d90ebbd9a7070263b2b8b02233c956c3a747e0df66a894ff65cc8cd2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6K2217206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96a1f265bad51116cb874ce1fe9dfeaf9bd2ee6a51ae0dae5153f54961814c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6K2217208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24f4e940a03e7ea7c37286be07eea262b64ea825e4c466b563207fa34f3a2e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6K2217209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7214c86bbea730b6a08a4abbde31c324b430bfaad13f5b8e55aff2351cf3b0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM8DG1819723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363ec01ce5fb07d4b692b0c0f1988b1440afea66c5efaa7605203c6ce2bc8e57. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM8DG1819721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39329e8b80b984b284410658bfcf7c5420ae9901ea406d41b5562af387021f04. 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/QM8DG1832631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb6e73205f9d9a3d85aa1ef59950525f6e3515d040d9d59a21285835710d31b. 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/QZWFN2377813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df44cab412d2eb2c75eccb10eea524e31cfd2916edc78b97cf5c8fa9f8fdf70. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:39:57Z), 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/QZWFN2377817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7fbe2d4bd9dca0063f2d1d11f3a618ae22c356ac6ca285a11c4ea7ce959994. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEM2498263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101c1bd466e163db05d8eba568375308b4ac741d41f706f7740d79dbc822bf2f. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTAT2447585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325be65c0d9382039c45368886b82e190509fc7d23766842238155eb9c1f8b1. 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/QZTB72574026.