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 0x20b47eb0ff144d896439cb0382d9cee11586406aa66953f25724d98d230ccd5b. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d18dc404-4374-4554-9f5f-e96f459a4e0b.json and https://artists.proofprofile.net/proofs/artist/d18dc404-4374-4554-9f5f-e96f459a4e0b.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 0xe8e3be676614d07cf45d5dbb8d96d476b1287816b00ea5aee196d367797ad47c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLZ542000721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3054fd25c8ca70946c9d0c520a963828059ffd1a03082ae43d43f5e4bb93e5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ542001634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfd397f4b8374fc31497b7dfbe1d73e5aeec437cca22633a9b761abe87ae589. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLZ542001635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c341c540c959f8361786c814a14246ac860272ca07a0e65c5642956d8e1a06. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ541801150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e49d5d792b18f9fff0e8cb7109fb880b60865557597975b81e399e1f409dbd2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ542001636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7071298e0f01cede3b24ff75314974d0e7d8d4454c700f5a7961216a913dca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ541901558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07378bb77da881f88016edfdf9d65b039e59eca2027487642c71c234451aef1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLZ542001637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df1705272d485dc9e1260c71535dfd1afbe416961c6457c1bf7d1bc64b0b644. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLZ542001638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3db6a41c6d9bca8f5c96c61d19f1a2936bbfe01b2fb21b34f37c0fe651c69a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ542001229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83aafbf7a9e1ff9c26fde680d91ba812d14bd605ae5de92792ca513d25d73ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLZ542001639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162cbed9a3286d4b14b23767a63d34b30cb84b418459a2e96293dd80b8e4ecff. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLZ541900787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3980b5b3cd8ca9463f01312f02e5d0dd852c28e7b886ed70edb5bb5871f45fd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLZ542001640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ef266a09505f4b52339e4f44028e532a69c8db159cc6aa9df83ff73fed05a8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLZ542001641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e76b202873881fef4670fd105c3230e782177459b92abe960f4f5f1455be8ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLZ542001642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0100d12890c39085e95270b278e397819c9e6811454e428d67e73347840cb214. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLZ542001643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c579e7f2b4a49abc685791a286a4e09497fa092a4e374690fac1350a81df4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLZ542001644.
Headphones (feat. Aron Blom) [Extended Mix]
Headphones (feat. Aron Blom) - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b92c9c3263514855359e0df185eadcc3c4333483243f7159bae90fcf4f0ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLZ542302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b076a987ea9c67f4564071145addba29d9d04176b032b79a94ae7464439275. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLZ542302099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fefb45f9bde69d8a22ecd92677fdc106fc7d09619342066bd166354d6779ff4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SEVGT2100515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f001be75e510cede23d04e630ed79e172031aaa032f1d7be7b504888f5bb3d6. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEVGT2100238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394caa8c1da1f7c2e26c3071a5bca272ec0fd09db4b131141c1e9d4571f183e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVGT2000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31dc91568e458343b6e65f714bfa2296679876ffe85f6c9d91a34cb00400c27. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEVGT2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508bda746a85a6e42f8e2cb02940079517bc2b2bd8861de7248ee71088e81776. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVGT1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823a2815bd4d0920ee8931c5d53efe799ec6a7bf3e102c06606cde7fade57640. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEVGT1800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f80712f3e895b05cde7432d86804c38f5ca68a4a3c3d82f620ad854621441ab. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/EEBO32100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc979c517152edd6e1c87a6561390b8c526e8a0275e115b62966b8ca8bc13f78b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/EEBO32100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e4b93114786fae00092c86f5cd19572a0d27687d7bba44f0fa8d6f23499144. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/EEBO32100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e75255f013ea09acd9836e854f0eaae43947f8ec6968463f9e540ea33c0a6a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/EEBO32100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b1d7face14879bd0f7273e7acdd5c720f273f499bfa293662bb384a98f644c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/EEBO32100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651011c282d4b422cc184fc986e53a2cf0ba864249ca31f70472b38eb16ccb15. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/EEBO32100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2914f4bab3a2835818cf90a7a2da91ac9ba625b3d34dbd6589523fcbb066bf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/EEBO32100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7212467522500f1430b91890f12afaa52f3f14f27277853a1bb5a4e7a27f9a1a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/EEBO32100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776df7b7e5112c0d975ef1975864218d64ebb0b165d2487b7e79081d19641e2b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/EEBO32100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1986bd5669ba018a488c12c95be6f4a1b1e54a4275e240dd41264172845709f6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/EEBO32100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aed30f74b251d7fa2151f58a56e5fb271b7198070b672eeac06a33cfc0cb763. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/EEBO32100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b902be4cace3225267cd9f4bf8a196945c4e93d2aaad9b2e87d1a1906db0045. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOEPO2000012.