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 0x4c7e59d93455672401c7ad726995f263cac96f8b707e0f37101dae1d8d479f2f. 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/1d99fa46-a048-4dad-b178-606cb4aa23af.json and https://artists.proofprofile.net/proofs/artist/1d99fa46-a048-4dad-b178-606cb4aa23af.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 0xe6245730790e42fed40b31b384c7de217f183822b67b321239811238de2377b9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNB2496586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb69fe5cbbb9ea2ad12829420f90fa36c6615d9aad3017f5d19cd4d3ef300df. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNB2499516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85832590cefd236e17b4ceda717ceeb06b277bef1813d8ce073d9cd45f964ed7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2499518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e47731cc607ff2d82613e9671d2b885b7fc8a4ce286a8bed9683026acda587. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T11:56:51Z), 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/QZHNB2499519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6f2e4befa1235ebcffd26a98c7e8e30573a58fab07ca245a96e30033e87187. 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/QZHNB2499520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bf59599156c83175b0a0bc615c7abf38744b0667fa0332e98e13afa8c6c8f2. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZHNB2499263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4fcd05998aa6578be8ee639c5a2d806da2f6bcc8af95f1f40c6f888597f713. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNC2438548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aec2dd8828d47ad489454f1c054d40c5ced1d1f6485d08daf1df3c09c573d2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNC2438549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa72ec371463b7ca79ff1698ea3c2b6eee25fb836c30a4d0bb5a8f53ad9bb95a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNC2438550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800b5c9463e77e623f114b05c9792fc4848f3af3f789d42ad86237218514464e. 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/QZHNC2438553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafdbeeeddce585b792e78edbeb39addb835eac605c1d00f4acf171cadf3aae5. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHNC2438556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d9fe1fc0ca0d01a3635222b337817cd6cc48c9fc791a75a134f940923487e. 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/QZMEP2494326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5385693a54c6171b39fab6fecd4b5536b0647c1df71ecbca394674d24d5cda. 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/QZNWT2453042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d40451b6e69aa723a0fbc21466e61aa66688f7f6588413336a38274b6eb3e67. 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/QZNWT2453044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79321dba42c890a7f479c2077db958d5ecb159f654d7484ba643ec8298f57d4. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZNWT2453045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b4712bbcde248c0a58c39cc6ec3c811eaf28b494c5ea1883a24228668c2ca2. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/CA5KR2476124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847620dc5c9009f405510d4f55f18161d2878d3d1fdd8560690d3f06a6cef306. 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/QZHNA2471097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776742bef03a1889c64f1c2e71d4841c747313da3aca8f565d0ccc2d9773aade. 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/QZHNA2471109.