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 0x40bdcbadf603b829ed9d96a59cc4284bcc3b1a0de6661aeba14d82fb3ccd842d. 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/348024e9-2361-4c1f-8d2e-5999b8a2c3bc.json and https://artists.proofprofile.net/proofs/artist/348024e9-2361-4c1f-8d2e-5999b8a2c3bc.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 0x8f1b5eae9fc116f219bb28c4938c338ca34c0aeb37e73201e7da9184ea3daec1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNC2303795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c225fcaef931bfb8db0fedbe69bfbf0a9a36655d0460e7ff11190f95505575. 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/QZNWY2369618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbca98687bd5f9fd69d1e90dc36ca945414196c9da25842567181a8fed460d5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:37:55Z), 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/QZNWY2369619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8f2f96092acd1400cb36ca888e40b5b24934b07d189fadf91a6cb2de6405f5. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNWV2310494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b9b68f8c5f168e0f86adfc7fb62b57b18fdca4ac5f254b4c1d91ad3b796eee. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAZ2360644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565f3355ca0fe442dfb33b2f29d54f8ee7fe5cb783a200c8b92d28d082a8027a. 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/QZK6Q2448473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d283689f6d5511e7e54ddd9bbbc1c240704094731c9697e510f29f445279ecb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6K2495579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeca2259f294d37f6490d8ece7c2a375cadf88970d1fee03634ef7f255048130. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TLVEM2468107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fe4007e73bf7d04038fe8eaebf260c363837475eac794a8e2c4787f0e0ca65. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TLVEM2483012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8ff63f2c546dd0580c005e411e21bc657fd7189b851ae3d8fcfc1d945f76f. 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/QZS7J2478841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf0317aafa0d1d1fae213c3d3bb60500b191653d1f4ef67a74951d1871983ee. 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/QT2VB2476184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb613a751a62f765a501ab2f16cf2f9b37f48706bd9359d597310d90c0972970f. 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/QZS7J2528213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2dd49bc6d9474980a4ce033c0103998e41545771decfda06ed7eac06fc84f8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:23Z), 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/QZQAY2573346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd696d662499b320dfa47e44fb35e8207bbca0b3a35f0c6f8b0784be5cd6f67. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZQAY2521813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb5b2a61afa2de31f897b6f21fac39c59b953760cedbc8e82fa31ce9d4d19b6. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZQAY2587724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2a8205fa97845f299484d985b9127b77d57cc13e8ddd8c28feebf90ab3b207. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:53Z), 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/QZS7J2565466.