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 0x1dd4fdd4a364ebe326acf3decd7d01009deed90f7657c72b309f751756571685. 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/fd9b67af-f2bd-4652-b2a1-b8a60d7d698c.json and https://artists.proofprofile.net/proofs/artist/fd9b67af-f2bd-4652-b2a1-b8a60d7d698c.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 0xcd5a12c4761d6f8694965d4b2961e7bf56c59ddefbc7cf944d5974d8358f5ff9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA52582333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf200e29ca8d4e40e4966be37e737c278e5d2912d65b8754303dd6169382ef33d. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZDA52581549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fc2a72fb40575a68966c22fa8091997d7a6ff961a61078ce85531b29af0924. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7N2510993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b120036a52b101260a3d09465e9a761894c8e397f7be8e812ea6a3f019411d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7N2510980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4628745697f88f9df6a86b732acf5bb2ee87c8bc6ddef47027c76b427aa1e73c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7N2510996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a3d0c2dde66ff501d58c4253364399f4db9f88ec4b575507c13dfc6bf0ba2c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7N2507781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e095abb2293228ca68c4b89567b3208624a3e58a6a75b57ad91b60dfc289e25. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7Q2572522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d76ed11305aaee40d7b25a43ebcd2e488f3b1d9464f0bf6b8bc41254477798e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ7Q2572686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb39262da97e65658d1b0eb8d55d0fa75034e6139365e1ece63324adf7a915e. 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/QZZ7V2573681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2d73f8cebe78a584c54ed1927106977f243185e3afe36401710b41b262c0a7. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZZ7V2573705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3bbb1a23a89fd519af4641ae35f99449734f53415ceda4666fb2bc224d4b24. 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/QZZ7V2573706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6ff053c35a73c3006bba02bdc6f0b7cc2c9c96d59f41e7e887df98fda92ce8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3F42527899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff0baef945b7c6ffbab52edce2fb83f68e4e7a9497f8ae525473e5cdd64055c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F42527903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71b99e0ee3a1d8e700508c6b39dffa1c311ff84bc3995a6d5bd598ae9b85cbc. 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/QT3F42527900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0fe9bffa923d998aa383eeb8f5c3c0a77639a81d62fb0dcf4adc29363d133c. 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/QT3F42527902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf528c7d23d1818fee365dfd875c5ee4ce3767e7ff94cb713a62b36fb19985ff. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3F72501125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d9f93c78aaeca1c30a813378090ec0a92475f1e6871340b7636145d2caad69. 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/QT3F62597569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e77a55d3eaa41695027fadeb01c09b953dbda7f4d94c1a48431c31561cabd78. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F72501417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f69432d0bf7e5731408f77670fe4bd00d0c41986fe56f4ca3d64f94f381a11. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F72501419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c43d30c0dde76bcca91a911e0cf49961a2164ed1f92a8c82a8d439fee4c001. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:24:26Z), 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/QT3FE2591363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e4a4c7bd33dc11fdcd1399bb11f456b4341b4f34f984457e6bd779f17e9a28. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:41:43Z), 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/QT3FE2589467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9668735db67b7f9afd610e7783289f086148f5e46e610a2f743973fd3935e44. 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/QT3FG2588241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc359d2426f74e3d7db50721abce263934ed8bfc5b6f4cbc0f2507ff647af12. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:39:59Z), 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/QT3FG2588243.