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 0x9b9509c0c40022d25d249ce6403939070a85fb51d353dc82986c06a34b1c1f31. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fee805e-eea6-44f4-8e4a-3e2ca2ef8fb1.json and https://artists.proofprofile.net/proofs/artist/5fee805e-eea6-44f4-8e4a-3e2ca2ef8fb1.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 0x81710c8ea7cac0066e2e41f2e85fcc294ef4982178ab7716f226e969965a7c0b. 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/QZMZ92294692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2768dfd32d674496cac3c3bbaa24381e2b85b17c16d6067a6992cbe824463bd6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZN882354286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e47089d815b003c07569ebef0bf3b72599cd575b683e2ba68904907a4eb40b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:18:00Z), 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/QZN882362863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb46540a59e67429feaa3be4d3142aea9bb34531024e607e8a28ec35db02744. 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/QZWDW2343316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5a15279acda9f6c1f78dc41bdc7768e658a37c84873bf5b04ee9df8321d01e. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZWDW2374552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f620df330603439671dfbc2191eb523752b1cab639bae4992d4e7f3cc7bc79. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:27Z), 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/QZWDW2395339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44da8e02ec4875de1043c6b20a4a492e5a448143a3f4f0bf923062b65b65a386. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:05Z), 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/QZFYY2469000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd6a7d2d0a555e7f141a030b4a4fac13bb06a59e65237af140a1567dbfd8792. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:56:41Z), 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/QZFZ22421571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bed9db3fec7af101db3da737abd41ed9104d4ba7fa249c13eff2ee9f060c314. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:42Z), 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/QZDA42485480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf91e9507b2deb3a565b51a0635aa12c3de29ace70ea7b41260b259bed723051. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:34Z), 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/QZDA82494038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbf681ae03556ace892347f8a1d7517ce9a167f3523e8936107b3372bcd432c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHN52499584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4257392dfffe70c0e75e6364f8aac9e5e49e843d9e3be7d01bfd36a2e31dfb8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:01:27Z), 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/QZK6Q2408710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a34c269e75b3619f3c7338b009fb9bc20e489375fbe11b8e711b22dc8ef8ac. 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/QZK6F2401594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009ca046c7328af12d7644c965c896d3a1766692dc6393b4cebcd0e4f706debc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:40Z), 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/QZNWR2436965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd53db4910db9a5b2fcd37e531f528662e03225c9aef31aebf3f83d6f76830b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFK2405614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43fcb2940e9debdaf8565ac6aec1510826c628c156a8d1ce19990a142d8e8bc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFS2477037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d300ab3755cca569ecad58e36df2c41fc75aadbc89daadac5e3b33a402092. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZHN82585570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ac9a9a48e610b38a7c7c4163f9342e8bb47496a739995869c518eceec1cf6a. 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/QZHNC2501729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419f2e573df0b3157014c12b7320a49567b82330e178c4248380f57c3b467ac9. 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/QZK6N2510689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea224f5b228d6ca1f32c57b2947979c46984cd8d498bf5fb159f4cfc8f95e26. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWS2542935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2f79b4ec9880d9630d4594aa6ceb4d4a9508be9d1381be5fb9050ddce3abd4. 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/QZPLS2542677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c0d0206a9b0eb88d8bde907b7185fa2c48bc9442fa990272fa502ef5b7a11c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZWFW2553765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48c83cf5cbe6bcc781a2cd871debe6ec9990b666f2db646606f1080b64e5bfd. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SE6SA2541959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c6c20aa7003fcb7aeab982d9da75611cd10d3a88e96415a3a2b9da81fbb104. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3FD2511835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc17a6a5aa9d7a0ced2155f73165d4b1d1851c5800062fbe6ce1d7aae66bbb3. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T12:59:49Z), 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/QT6E82583497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c82fe6c4fdfd4143e8fdc0928abd2237fb46b968792ae903bf266318684015. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT6EF2537492.