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 0x3c2f6c77667c47de296a5f9c0dd542220c4e1f167b5286bc06609bae229bd91f. 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/1323c951-f36a-4bde-a0b1-0f49fad69066.json and https://artists.proofprofile.net/proofs/artist/1323c951-f36a-4bde-a0b1-0f49fad69066.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 0xc54992400f2eae2ffa12e8d4e8f132fa5186b17605b6127e07d01de29003a41e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJY2277211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebec03b5f57aff51a9e93fabe44c4522a47cd114cb1aa2348163c95fb0f7c8d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNJY2231423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296d4f8c31167126b6e75379fa2a77f60a9c75d797e0dc63868a30e7d5725254. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZW9L2278666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36429f1003b1a8c4cad8766b70d2854897d5b07897b8221ff6d87436040ef9d0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZW9L2278372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a208236a07bbd174d37dea354e2e11d38d3a7f16f72770b18d4c7ea13b336f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZW9L2278384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22cf54e71ac44d38b40068e2a9cc1dce756068da26cf1ab7247ca8408737c7b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZW9L2294547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d1d490664ab4a285c03243abe1ae301b4799b5d042072bc8956ce612052e58. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZW9K2215924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef0e17496a1c588b9d3d5e14e62fe621f038440f6e5cb8c6ae796522227b7f0. 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/US7VG2357090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9440767a2ef162885695ba14a965f0d4d6233a0fd826bd2a8f02ee77a3bd86de. 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/QZ5AB2359856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55b44a3f5e7e4956e20dbe4a38e7dfb31184525f417b97d184739e336913deb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZ5AB2356882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102e4b2fb8cf86f2b4dbc76e00e6d26cbd5b6dcd8bdc61b2eaa3a99414bff97e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZ5AB2359938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ee5e3a4dbadf6ee72744848aeb43e9f2fd0b3c3d640e7bfd5c517a1109a50f. 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/QZ5AB2338184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0548720ec3e12e813cfc27a63c6a76021d599febd4fc3adc3e679287302ba8f0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZ5AB2387656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81bc12027562f008968964190110b8f96e192c6399c86706fc9dfcefda27f1a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZGLM2309238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed068c2e940bfd3ca646341d4b58fe844a5ccd2aaaba294ce1990471e5f8dfd2. 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/QZ5AB2387672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5514beba7fbfa0065f151ef99fd843a55d7a8f21c25bbd6672ac2c5a0b02af2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZ5AB2387673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3114c0641eb47d7f64440937aa14d3afc533bc832464cb75d26ee53de250b4c9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZ5AB2387676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1e4f4452d233b63a3ca3a9a9f72630f465a08da868a618cc5cf3408f5dbb9c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZW9L2278448.