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 0x7c5040212d8e4e57d1701a25e0400d2023299cbeb7ef3b7839e3be0850f9a5f3. 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/904b3659-e419-4f4c-9115-6d81e427c3e5.json and https://artists.proofprofile.net/proofs/artist/904b3659-e419-4f4c-9115-6d81e427c3e5.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 0x31a617e0c5939a1cbef7b16a28826bc820c8bad241cfeee5b5e515b4c31199a1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZDA52364524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9873f493b6101a1de413a9b1c4ba38300924865090c501f14a82e10cc188c2. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZHNA2410349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7dea56af987301358cf29386f65cc44c925bada597cda21f662f9bda583009. 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/TCAFQ2125914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54fbe00b7a610a84d0255774a9323796b568dad85e8ad78b02a33f70c025bc7. 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/QZFZ32559524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3114a34d64a054c25dd6fd70396ff33fd9c7f5f6457f155e71bdf44f626508f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA62522420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8952194f0a5161a4eea39edc843e70d621d0bd477c4a5abaedba72829c2bad31. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:35Z), 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/QZHN42512841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd4f7c6e004dd77283752b76ec586b980c7d0cf6c4a020ac0104caf0ea08b3d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN92534884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bfd8f9f35742cef3f9efc36a39f6c09b4bc8eab94687e4ec0d9c6f986c80da. 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/QZK6P2580618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb5700e3238fd02338f380940cda71d8844e3f81645b1bb2f2250f4d62387b. 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/QZK6M2547635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7736589ba2c5667ec13939a53b9566d177d63899434f45923c0e0b8386a1f7. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZK6G2523723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c86915d6a9b2e7dba82def665a07188435aafb25f04ca32ed4f08e116f27f4. 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/QZNWT2563735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fea106b22c37d0d40a4cfacb21d33cdfb69eabc196a6b342b779f7d409aa4f1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWX2586778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52be1e6e8ec9add50c03ce2ed79fb2e4e902775c9573e277fb5fb95bdb82a53c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTB22541610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b42b9e86bb2197ad140bed245c773632aaaafc2eb0f02952662dd6b437c439. 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/QZTB32585569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adf3dd23293e170a7de2cc7c574e94bb51565ea29c02d3645c3fe531c860f70. 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/QZWFJ2516410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf298bb1dc1d36cdf5e7f51d9b71381be48eaa09412b0db373e4bb7db0e8bcc31. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFR2536992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7795458a4c3856e1eefe34f06a39db3e414a217d86e76b719b5e7859073221e7. 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/QZZ7S2575796.