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 0xd1cd85b76ea42ce9f8cab3e67bd095f3b63f46e9f495f7615b85d43d6159bb9a. 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/e7e266eb-2210-40dd-834c-e23a82b0334a.json and https://artists.proofprofile.net/proofs/artist/e7e266eb-2210-40dd-834c-e23a82b0334a.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 0x9f54109aed70d432e383009f2b460501a63d60fb655461e7eb0a0b63e303f09f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN42119498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf69ac5dc6cd97bc747290da9468e5c8a9ac8952fba0f2eafedf288000e22f43. 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/QZHN42117813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ecfd73962cb6afa85228af768174da4ab8ec7bd0dc5b129f38b0bbc17aa10b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN52120381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcca848a01d07bcc40d4f668fe1a2d534c68d98737c96c36839d9d3f6fa7930. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN62131962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43da9cd38df60f143eb1f4874352feb767636bd71b325624fb93baf6d74c6b9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN62146260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc0ada4caae29249c17f731611cecc1a7c9186f768bb776970a55dbb69afd6c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN62146868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e55bd81c613bf043397012462ee115dca51246015725f0423136ccac8008c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN62146869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd62bde6232bc95fa7813798c8bcfee5c22d356a11bd6aaa9446185e2ae8291. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN72156978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4fbbffce16cd89d62ff3a40fce490ffc8453e9b23e0f00554759782d1f5109. 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/QZHN82103827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261b33b8fa956648fb3105110be2a4204814ac4fe6aa4c01ba9a17cf01539a7f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN82167374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bdbaba778c5780116f50088ba46d543c98dbc0ace5dc232d8f3a5badfde6ec. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZHN82167372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c0b47bc6ce1bb611fcb5a831b1116e7d186c2df37ed23d7eb7c425748f2919. 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/QZHNB2116233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5f6b1680e12b4be445acd4c663577788642dd1066b0502547beb6576b2e9f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNB2115774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d772fcf72e5da4557e1d739b387e25cd3ef7212d03eb358d627ffbcf4cf4130. 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/QZHNC2185684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b6f45bf2c43c6944d1e5e6f2a5fd3442e90f5de136e785ab0f4d2e2744fe61. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:49:56Z), 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/QZK6P2142681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee62c458f800017755ccae516324ab325cef0f6da8f6a975ac3d42a97160737. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6P2142672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a16436f010a8183ed7911ae2cc679331aef02c5f4883ad9a0d776cff2520a. 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/QZK6N2166594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3e76379f161989411ddd35b72947653f66d8162817aaa9faa88baf78da98b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6N2166595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4bf8c67dd65bb0dabd797a312bbad0aae014ce7ba663eda00bf0717e26b26a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:28:32Z), 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/QZK6G2149930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab24a8cdc87ab950fdbb17cb98d88536c1e3a306dab8866cea1766db6a380b6. 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/QZK6G2149944.