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 0x2d1d953051d9040ace9dac993bf46f571bf62376ec54ce8d851d2b06fc0c88be. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2d669d3-77e3-4ea6-9498-bcdd6f254eae.json and https://artists.proofprofile.net/proofs/artist/a2d669d3-77e3-4ea6-9498-bcdd6f254eae.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 0xfed50cd28b82359dc764af18cf8b269b0a2953d277e74cb6170aaecb53048c58. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:36:37Z), 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/USCGH0908315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41de7455df9ed8c3fbdc862bd6a508e79642204461ae1ad5f56f65078800ab63. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:07:53Z), 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/USHM20944306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9618ac74d49e04f3338e1b6eb8734af010a1d03872268bf08697c2382fb926a. 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/USHM20944309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3170b3b03cca32934c16cee2d4b771b4032d246b9333c079d38d81632a730a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:56Z), 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/USCGH0908299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad3ea9bb9cf584efe6aeb04f6c138f396e4d71c10f49295e5b936fe5efa676a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:08:09Z), 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/USCGH0908300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42f2f7dfdde654366bb003560600a1bd7aeb312998087d8e50856e36dd81070. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USCGH0908301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b089a961fc91930b942fbc04109cfa4e6e99cff03519aa1e414404e332d652c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:19:31Z), 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/USCGH0908302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0134197562be76ad827d7d9ad826fa8ff2f2b2b7d26913a060e080b850ef27c. 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/USCGH0908303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839299a866965eab3696d779150c7132d92aa8d974647c5bd01ce724087b28b6. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USCGH0908304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73f130a1e590a11cad9305f2f07b456d8f4d4854b4039f7d74a8d6c827d2db. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/USCGH0921396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce5183b2de4be9248240790cec63f3bb6036c4cfbe6f05213c56d9b47ca1b34. 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/USL4Q0845594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63bd3bd139c1d7ec39dc6a4a60152e05da02eb1b550fb0612b0aa1d4397e39b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USL4Q0845595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f7e6fc2df5f0587a47fee2ed149ebaa53e9c53b96a2e548f7f7b69e8254447. 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/USL4Q0845596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd20fee4376e7024535396ec8ccccbce7092c0bc9e428ec7a733ca016ff4c489. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:19:01Z), 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/USCGH0908341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b91c84de4674764ea9f283688a13293b1a86606ba707674254be9c100a7f425. 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/USCGH0908342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd9acc58a61b8b2c676b4d61335bbe56211e397f4b510f1a8d60f7cfeb96ec1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USCGH0908343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde74eb3ea07506925b5195f6d900bdf22c367462f9042514a80cddb91b3ed038. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM21083299.