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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9a81d871155b54870c9d3d1c2d93784f743e9afc4f67336352967944c347f5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e77632bc3d3572ad1edecfa4a426856c3743ce84463871dcd2c2744327d968. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/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 0xb8620caccc64bb90d44c06969ecf49425460f96e58ad27a5809e1be40b1f5cca. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZDA81977552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ddc87899c076da9c49f1baf2bba9168ed7701ed58937aad951767f3c5b1d2. 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/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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df95966455aa585f7040297f514d2cc7551cdc8fb04e49f74148c1f92c92ae2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZES82087202.
Thot Music Chapter 1.5: Feelings on My Sleeve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e33a975fdfaf0446b5df500ecb3e28cda8b76fe84d99611030614dd8be24fa8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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 0xddc53fadbcfdd3e53d0aa8753810e6d72298546b830ad171c2afa0726331d5b1. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZHNB2099950.
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 0xb84704c3096be0a2a3c8fd7730d0b0ccac82c6efea8bf756e70e9121354a89d0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZFZ52194048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59021defd056e51ce4d24fda4db8af7673aa5f37d68b04f626b932f1fd7c5d0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZFZ52194049.
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 958792 (2026-07-19T22:55:52Z), 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/QZFZ52194053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3488ab042c93c8f21e75f41acec6408610479b080e0dadd402a21953b192ea62. 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/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 0x37fb1473591c722530498bc84ae77b431ab79567cb8055a4cfa6abe53250a5ad. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZMEQ2079119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9fad5079b1ec38afe342c2947878632c22dead58009af255bacfc07b9a9d7f. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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 0xbd6dacf48e89b1aa032ed6e8eadce7a279fbaf1f35c11f22cba50c2596ae549a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZFZ32352204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3c58504c04acea9af75c6a218cb4a0c86ffb16ea160e263807aead2706faa4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/AUMEV2477257.
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.