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 0x8b89e996c5efc1b028f6aa7ca887b10ece55e3fde3e85119eafaf1c8b4f5bd87. 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/f5416aca-ac37-4957-a326-434a803f7919.json and https://artists.proofprofile.net/proofs/artist/f5416aca-ac37-4957-a326-434a803f7919.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 0x34deca167b62ba3839896fe3cb12abeb42fb57cced4f47bd7adf20b004f01337. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6L2221910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8ef1c1fc71c76f7f250f722522ffac17c5cc54477e090cee678e3ab80f6a3a. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/QZTB32239002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ed145a40ec0c22eab0077c2f25036c3c1a0b3c3d3be0b12f0224eac5a0af58. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32391280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611ae2f823bed4411703b73eea46a93fdaadf7f9eb20a70a832f6a85eb78bbd6. 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/QZK6Q2310721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0360d69e04644c3c2b21cfc274eefa8fedf1f24c4e8d346fbaa10e53762a805. 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/QZK6M2365469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20059d84d44cd8463451b2bd7a271ca857fd5e2e3d2d4eaa88c58d90fb9bea75. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWY2306234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e04b6496e49d6e32f8b715296cb51b17ca259bf286672d6ad47099e886bf76. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB42322455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15920aeb6b4d817a036fc7940063e3654e4b99cfc583c0a28bdf86861f2e086. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYX2417840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a184ea805a0344fc9dcb8d718642a3d32e0216b3acc11f9e5482d7e14a6f78b. 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/QZFYX2417843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073aae6b52ecf326eda0b9e6e316f9880525d9600a1967e617385ee835d5a56b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZDA62454414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a2acded060c26f2b01c58a9a5ee0673d23bbd423535a3aab3aaa32f8c0d780. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNWR2490160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94220a8f95ee75237443fa487a2ea9968f36db57573d2e9b91977de4f9a4cbeb. 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/QZNWT2405733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241bade0cc8e9dbd40c5cf6b5321223320b9c1303061f7db5d5871583fff2403. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZRP42468623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0403873c6676aa99ffe7e8b1e16223a3ad80e77d6e93792016a01662f6b86ff1. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/QZTAX2464486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76c06cffd6f1ea1b7b5960485b350716cea9ded518c126d48800d36e20d1ea7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZWFS2459116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60fe4f962b4083004a3dbc609f290b3ca4ef53d54cc2f68bf1eb9730df2896b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZWFS2457084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0553678934bf1ce9157c00c6e652d13a843ac945d5b115201fd12d5babe0cc4f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7Q2406577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915fe3baed34d7bcb7f7e68419ee5208153243b964571844457079a246c128bc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7Q2406578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4303c67c951125621f51f996b70995df56722a6d18d69c9ca0f3420846672bb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB82401162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be60859ccb7f7f6610e7965d8638c818588b078a008f2cfe95eac28a90128a6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7Q2406580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915edcc43a1e7b5d07a521910196af95806df39d2752cf49781d28c034a6c29. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7Q2406581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb894833889c74aab15dc10ad0c74ff95155db69e8c74669a51ece7bb9992f524. 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/QZZ7P2484803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f088c7939d492fe54f4254b42b97ba8ef5211f2cd911a1654871221ee41672. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZFYZ2541488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a876ae2c9dc97fa318ca3fa909f9c3fd70b2f547814e3c4221f81bcf624e5d1. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZFZ42517978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00107194d3e5a2eacb9b5216f0f570901019c2fa8acef6bffc7423c68588752f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6H2560014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b01126d7c8d88c629fbff90343b59733ca12f235ce385f52fcc640d2d834678. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLS2533418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c9c065b938d7fbe33a5df880e6ee00e8708edbfeceb3b102de1dc8e63376fb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZPLS2533410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2792c2338a1a65a4711a5c5776cb75b96e9f1f638a33270e4304f6793f685bd. 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/QZPLS2533420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1219632c39a2148c37ea160cb5da989df6173f5f232e8d178754755ec9efa59. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB92592561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd482866c5fdd6f4da3e311a9f5b1ece556bf287ba95761c763da25fcdab831f3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ7W2564367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c4135205143cfc427488ccc78759b9d715713ff850fabbddbf0127518ebcbb. 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/QT3FE2559320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087163cd4651451b2bedb35d6d68a6d0099cdf43cc60048d4a017604c07b8826. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FG2565790.