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 0x7181af31736ed1d2f180b9f2558f2596d5f571a6adaccbbfcb3cb5ec726bd88b. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/283d8625-06c4-4b88-b6ac-4df703acfdf8.json and https://artists.proofprofile.net/proofs/artist/283d8625-06c4-4b88-b6ac-4df703acfdf8.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 0xe5c5a0a4429d32e552621bc0ced37c2c3e5a03f23400316ed06cd81863a5ae00. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:05:07Z), 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/QZS652370371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85c8555c824260fc60c4bf890ad4691e34ad7464eb8a0a45200b532934e3f19. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:57:50Z), 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/QZMHK2336638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f577606a973490a660b3be334f9c6d54ac18e1e58d97fbf142fad2a1820756b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:45:12Z), 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/QM42K2327707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933673655ec8f69dd5aae5fa090985a2c7abfb0360c837c5be49377e0bd89b16. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:50Z), 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/QZMHK2399823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7d63958390800e4e5c879ce3215f7c83f6897d0dd5bee4ca112f7c09aedace. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMHP2303056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c1e1f83a7ab87a2532bbc9c0a3399b512459e3430b072d9db7e2a6db6b747d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:19Z), 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/QZS652300889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46a47980eb5f7558ae6ae29b5413160f44bc78bc7950d227297989a7f8e7e28. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMHL2353157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a864f9c0ca26422aa445f119c4615427cbcd16fe961cf8bc6961d48b02ef6ea. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:36:59Z), 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/QZMHK2305173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f0ccee2aa0177856724f3bceae468230e305e5204d382ff8a015f5ceb32077. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMHL2371725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467bd87b33b672d395190bea4870c0ef572712cc2b268f80ec02df24414dc9c3. 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/QZMHK2323676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc41b621c0ba88eb227ed3803c39ba98cde8ca76756518b1adb4db7e5e1964. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:41:29Z), 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/QZMHM2390117.