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 0x2e496cdf3e0e0119c367e12e4cad8729a6d7e9f419fdedc2084bd4b4bf07cd85. 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/0ef386f9-043c-4500-b68a-af76043210bc.json and https://artists.proofprofile.net/proofs/artist/0ef386f9-043c-4500-b68a-af76043210bc.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 0xcfb906bbac8a8cbc2e0d5286535c587a9c9388932f4f7bf4b71f8168192072ab. 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/QZHN32277159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317bd7ef593228d9d621d142099d581b0f04fb671e59c2a1eee8deadec31e1e0. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFZ42355878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88813cec6662c61676fd919c5949f05ed544a2422c536ca77d04f74a63801d2f. 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/QZFZ42355879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed4c910ebeede31fedc9b859c7d66b81a92d892226b1b620fe1db942e13715b. 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/QZTAZ2393111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76110776c275515e1ccd9622854bd2f3ea9062e940a2f1d794cbe75212adbe68. 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/QZTAZ2393112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc487ce1f4e006e21ac7d7f1fe07cb40b3a8b427cfc4ddb1cd067c5917dd2797. 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/QZTAZ2393114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aaa6fb0c49eac3b1eb2a65e1fcb1699e76ed103f922c737fa984339bb9cacb. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAZ2393115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5359316c3867fad26e4decfd3cea2e63133fb18d5249b6362f9f33f5118f9177. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA82528385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8bdb10599a096d610594f3c81e0efc8b76221e423cc7cfa071c31d90709b1f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:07Z), 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/QZDA82528386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86778e7bda7781b55f2e8f196900430adcb3b522e6996843db7daad6bf2509c9. 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/QZDA82528387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016918dfec7fda73647487ed48e71c4d88aadc54cccaf262a1b31d10f0e7ba25. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:49Z), 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/QZDA82528388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5c045533c8706c1d2dbd4e60d32b5098b531941736cd9bec709cf0014251e1. 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/QZDA82528389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff4340600b46943d506a6b22886b646c1024c0dc54b466314d247b29a5a887a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZDA82528390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7065545ea34eccab8f07531116093d8b7765ab2fe707b667dc3149298af3adf. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZDA82528391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dead67d2bb05f2b09a2181308c9f8ca69238d53c194060f2e3d14749841660. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:14Z), 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/QZDA82528392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75a383493ca124a076879f36ee3e0d9fe23a153435d58676be1ebc91b8a6e3e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:46Z), 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/QZDA82528393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e04a39d277525ca3c17f6e5eac4e3fd52fd7180b61901f96baad85f638e3632. 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/QZDA82528394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec1d3f5dd2392693127d0ed51fd125ca7142a96a55590a1b46fa1c3474e18e9. 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/QZDA82528395.