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 0x0eb26dc86a9c2a4ac961521a00b398fbeb75160a75941a9ddb691a6e7b43963c. 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/91b85013-245b-415b-aba6-a62a367a1eb9.json and https://artists.proofprofile.net/proofs/artist/91b85013-245b-415b-aba6-a62a367a1eb9.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 0xf5564e05db5923ef6e6d8631857c15ae7e19ae031e99a1164ae229b900af154a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/UKP3G2300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e549791b54ae00c1b2ecac8500cb3e5ba2acba78f19364d234964a7ac20ba2. 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/UKP3G2300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a14368e0b63e1c5b5b982cb0b3cb6f1fa66717e4fefa57a70609b3d4585c793. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKP3G2300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a344dc4830e0690ec7a26d73085da5f103fa62f7a1d22025c8af17ee8deef71. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:00Z), 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/UKP3G2300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9632014a4135dc34d91b9c08e8f0784aef035745d4576f5248143028725c37e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UKP3G2300985.
I Had a Little Nut Tree - Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0a23749bb933fe852b67669059a55a9557d0a66047ac55f29a92fdffc76112. 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/UKP3G2300987.
London Bridge is Falling Down - Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dba789f70d15fe20ff01eec9b41a04b181041c16c6c6c16881efff313977501. 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/UKP3G2300988.
Mary Had a Little Lamb - Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0042c75c8bff11933a579bd75b8a6235247befccbe2070adefc6249a782cab40. 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/UKP3G2300989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4899d7bda1da9b57d90b62b5f154d3fd9d79eae9c8f61ed3207e1a2c0ba106. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKP3G2300990.
What a Wonderful World - Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a6683e57f416193954768556b8cc3fc1863f3afbc4ef6f6534c0fdcf14aaa3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UKP3G2300991.
The Bear Went Over the Mountain - Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c48d214ae13d2eacb1b4f93092328c1c3c98805888462dcec4631152fc065e5. 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/UKP3G2300992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afd5b4d2b1dc0fbddf70777fb507f0415f141ff26e1bfe7396d3bf2acea5b49. 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/UKP3G2300993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df0f48cd7c973729df5318928f14f3d8c889205cd0e98b29d785c8ffd19259. 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/UKP3G2300995.
She'll Be Coming Round the Mountain - Lullaby Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5e7313c21033f2ca47e7e65ccabf6e55918d7d8f07e1a04fb1bbc142eb8269. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:04Z), 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/UKP3G2300996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05731d99db484386bc30713b276b5efbe4707b420b46df199d3f5121e5e6621b. 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/UKP3G2300997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7dd6fac66f7e1abdaada0ab5735d2ef87494c5c9a5566401a0dacbe439c259. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UKP3G2301809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c449c6049e663747563ed5b1876cafcc300df1c7aeab1d96e4bfdecafd626. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKP3G2301808.
The Wheels on the Bus - Music Box Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037c2a57871bb2a6d1b1c4827d3bc419700414a54fda5a5f5fe5c2efdadbfb98. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/UKP3G2301807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a4540fb20a19e4dbfc95923c4bc6c5fd03c205058bc91fbe61a1758c356fb1. 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/UKP3G2301806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc877ad7365d9a833e873bde5729a999bd28ebedac16fcc121e3f2ca3a181cff2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKP3G2301805.
Hickory Dickory Dock - Music Box Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9717dc62c8f1322f93140ad98e12e10f5e72682c651317fb3e723b69138fab8e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKP3G2301804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe843ac022ed99d7ead54e2679bbf9603e37cb2c55b40700843783427b27f22e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKP3G2301803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764428738d3d301fce7dbcaf9166a01abf31e6aaa8511b6b8027694d4a935f6c. 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/UKP3G2301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a3f3272c89f090341a84de1e51cf1b50ff9f023512152ae85c14127149376f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:51Z), 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/UKP3G2302445.
Row, Row, Row Your Boat - Down the Stream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a38dc7d7de164dc0aac936ecdc35342ae45c05476190eea9f69872952f0ab61. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:03:21Z), 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/UKP3G2302436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec27fdb4ca0748f3d41faa6068d8411bfaccbdf9c04fb09204ad4bdd2d7421fc. 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/UKP3G2302443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc667d4c28d8d1b0c217e960319b2d15ff1a8ef96ebdccb84bce94138d61179d4. 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/UKP3G2302440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd191967ceb4d15b96bbc898e80b1f6298519239cd65b6cc81e3d01a205562875. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKP3G2302438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c3294934c30db23db63a90fca15853cabeca7813193f30d033b609d9ae8eca. 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/UKP3G2302444.