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 0x35514ff72e04fbc17a322be90b7efff3713a755bd8bb8480b002afae78cdb2af. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a376539-f826-469b-9b85-70d858e9e43b.json and https://artists.proofprofile.net/proofs/artist/6a376539-f826-469b-9b85-70d858e9e43b.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 0x2f6744a7a244bab1825d95ff9184e14f0c1dec65ee5c4e1fb69b7de181201ea0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMUYR1200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b4611a724f5f1ba9817d9c653d388cdbc5777a4f80323b8037cc715ea171ae. 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/QMUYR1200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c2726602cdf8194dd05162b036448522047d740db71e634314cee94ecd9645. 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/QMUYR1200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc29dfd5cd2e807887a4173cbd4e55f04084312fda75890f91f9fcfec6b5aed. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMUYR1200114.
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 0x8e5ade8e55856b6b05ff12dc0481ab9587e03d6451224d0d77b7e8e8de3439a4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMUYR1200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6068d3b524a51d2797acbd68e0558719014f2e7d111923a4ae758a609bb215bf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMUYR1200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266274361fd9635e6db3c72459a2a69c2b4f430dab929e256ee7e2e32edfe295. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMUYR1200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbe3a3a438bb6b743ffe8a2a8191a66ad2e01ec3694fb75930f47ca597bb418. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMUYR1200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5195601c691e953bb774fe3a2221fa815135d110f5db8eda52d969653d172b4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMUYR1200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938866eb8cf6e26378e89ed55ad5956976f3f96e119d012666dce8f9167f3445. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMUYR1200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67eec34472914aa84d87d73fe6756f6c1d40a808ef4e60289fef7cd743fcb58. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMUYR1100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aec09db771dda50a70a642d02ae8b4abab1ba772c419cadaa41008c559b215a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMUYR1100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd047970f28b1183dd2dac615497736fd3d3055ee9475301c70f16c3a46eb0982. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMUYR1100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf632b8eab483156a13bc64f6e43fff05d39cd2c3c754b48dd0f8fc68048270. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMUYR1100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f08021fa626d8b6d80e5dac12818647427d0ea7b632aaa0f75cae9924ac3c8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMUYR1100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f447f0579c41ee6465748699c33701d78abe91047ebd98196cb4c7855265d84. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMUYR1100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb820f0335f0bf1582ed5d8a8a11a655d34041644723226d0b06b64e9c52a1690. 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/QMUYR1100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f095a02914dc8810cc18bdd7da6873cdffd397bd3dfc3c9c2a98d703cf1cb4. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QMUYR1100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9acaff1b872eeb4d040ccd865f9194f3186fda09a7ce6212ce8493da9b2454. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QMUYR1100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8ae6b63599aeb446ddda1bfed2411f2351324efdd8ddff8fe332e675d6318e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMUYR1100123.