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 0xea9a81d871155b54870c9d3d1c2d93784f743e9afc4f67336352967944c347f5. 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/0788cc65-6c6f-47d2-86d1-9ba29de927e2.json and https://artists.proofprofile.net/proofs/artist/0788cc65-6c6f-47d2-86d1-9ba29de927e2.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 0x04e77632bc3d3572ad1edecfa4a426856c3743ce84463871dcd2c2744327d968. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:23Z), 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/QZ4JJ1852035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b006f30c4369a8846d1baa132c8283f18065938280fa902894f5a0148651309. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA81965895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ddc87899c076da9c49f1baf2bba9168ed7701ed58937aad951767f3c5b1d2. 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/QZDA81977553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7facf2ef2b54cdcafd6e95abbb4f95f4e48a63ac0a9d2447148682367368f5de. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA81977556.
Thot Music Chapter 1.5: Feelings on My Sleeve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e33a975fdfaf0446b5df500ecb3e28cda8b76fe84d99611030614dd8be24fa8. 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/QZHNB2099948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16459bbc3dcaca5a01508ad337693afcc441f8190077831277b570ea10722d26. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2099955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15d21d5f9df6f3ef91019730b47d13c75b3c71950f97444d47d194e26b87607. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ52194050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e7ed76fe838ed5a617d1ebedbf3fcb485589e90a28dd465cd63c1b85434ea. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZFZ52194053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3488ab042c93c8f21e75f41acec6408610479b080e0dadd402a21953b192ea62. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMEQ2079117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc129a787947150e8201c0fe54c588e16e03aed9589075fdcded319040bf553. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZMEQ2079118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9fad5079b1ec38afe342c2947878632c22dead58009af255bacfc07b9a9d7f. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZHNA2186242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54d9afab340362b21647e009f82144f3846eebdeb6d981265764c4c7582a76a. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZHNA2186244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e8b3ba46de2aa11ec2cd322ee02357f98ebc1a2941307824dd20d4974524c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNA2186251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e661cdda74082270b38ada022943536d8c49c347e6ba31629e08bffca5ea29. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZNWQ2297784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17973182ddc35f4a5bc173351503163647d34fa524a98518ee6f2d6b211c085. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZNWQ2297792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd989db0b003d489e2cc08e354154618da939f5d28d6e4c29e392eaa9438f4cd2. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZMHK2544977.