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 0xa6cfdc9fcddf6dc9871a47b1094df580de7c9d281b36d29613c7710f01e55828. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4afd2ad-b69b-4ab6-a9dd-dfa4fd6d8470.json and https://artists.proofprofile.net/proofs/artist/c4afd2ad-b69b-4ab6-a9dd-dfa4fd6d8470.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 0x42b2a07d74d58c7baada9cad5b282ac780217f12caf732f009d612fa358d6da8. 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/JPG102200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48276f7154857491a690a98a0b497483854aa5c7661ad9780a2f50aa2ab67b8f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPG102100754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91da25d4e1cd0e4e4b872bbdb349da47c33f6bed2ab9a7b11adb546f26805edc. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/JPG102200368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef88bfec465b633b64fad82647266b6899c0d27ad02d1df63fbb3cbe0b0bf09. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/JPG102200369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb724fccb63a49f96de28a9142a9ee66944f248aa88791c4afcad666edb116fbd. 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/JPG102100461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99177be42908053b693fcaa9a8e99642f0bae82228302c3af768a267ce9e8193. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/JPG102101420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18111eb4391f0f2fd5e9754299194164a7bf8572792c36acc68b541a66f9776. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/JPG102200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1279cd1f45eedad4f454a2dd254772224966b4db2013678e8c514b53a11acf9. 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/JPG102100984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d95ea1fae38ae857920218ac917b54bef7ff238d344da0a37439c7bc5603c1. 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/JPG102200372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f77ea6e9a64aea5b08a504db399f5d9e86e7bbbd407829794645ad179325cd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPG102401335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebd5b2de9daf631b7eae97c3338fdef45b4c5d8057f84f3c436bca8d618a668. 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/JPG102301340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9df46f1fbc1cefa5d3aadc01956927e3506790f5b840f646309862468b81e3. 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/JPG102301341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab57dcfbb80f9e871d605880ea0185caad7f8ab49b8b12069a5f3a5c90c38d3d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPG102300940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ee7b598b3bb35cb888a1556550959239296c894a50b654df72ac3fed54ede6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/JPG102300867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3020d3d5d335ed1228b54b2e21c43656cc08958384fd31079c34d4e527868. 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/JPG102300941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83621e0989046848e5913424bc5c5cc5657e45fdbc3b2ff44e1f3b1cc5d70c39. 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/JPG102300942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3993f08515fa53b765336bd054be4c7b8c80b81ca52316b204c466df45dbae. 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/JPG102300785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379605583f80aa46a0fd6b363ca4c086260c5b34184355566297fe256a2e67c1. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/JPG102300943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ee7b598b3bb35cb888a1556550959239296c894a50b654df72ac3fed54ede6. 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/JPG102300867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48276f7154857491a690a98a0b497483854aa5c7661ad9780a2f50aa2ab67b8f. 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/JPG102100754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca96ce6389751653fab7a88f38b0f7cd965c24bec0890f9e33020672f4e0bf9. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JPG102500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a090e82a94f81dccea718dc1d5638a23fe9f615b57a5e379ec51b1ee9eb0a9. 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/JPG102500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f2bee1de9467bdc6ca412f4db86ac3744c3d474a67d3370030fed6784035b0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/JPG102500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fd56f6155178b28f753e8f5cf764e9dbd6a8fdb9911a9817b8bf74d48af776. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPG102500307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1326d5bb80a778b514ede01b9d1776c8d9b2ecad6245222e008dd75181201b6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/JPG102500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f1a1020e9ebe04c91852bb6be02e2c9dcb146f18cba77e4e0e343820fd9976. 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/JPG102500309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae921f3603f3f2ecdc8244444459178d6918d5a1e19ab73e6be3450b7e5ce7b. 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/JPG102500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648ea4dcb5becb6368365f04db9b6b74e97ae9b212164c72fa0653beb9344277. 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/JPG102500311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ede930ff69e0cbdc93425c3ee437a5e30efbb3833c2e4efa45fea79101a1ec. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/JPG102500312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ffc44966ee4df97c0a32f5340855892851bc0a520b73bdeac840b7efd9649f. 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/JPG102500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827c2ac770a8836702ab3053f75fbe018f3bb50e8522480afc0ed081109ca98c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JPG102500314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed283382516c56ee3bc16fea029cf166ef0d7cbd7fafe3c1f610585f8dd594e9. 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/JPG102500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6008f3be444d3d46d99135146cf29a594ea62111769d906800544b94103d45b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/JPG102402330.