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 0x00f4a16ddeca7fa52116f7cc2d816f9e513f276f8f1b1b759d4655d1878767b5. 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/6c812e8e-54bd-4d64-b3c4-1225d7289a8d.json and https://artists.proofprofile.net/proofs/artist/6c812e8e-54bd-4d64-b3c4-1225d7289a8d.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 0x6c3d0d7e2a32476044b65aa762da0b6f15be8cc426a387bb875d652f2f9fc24b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5752190596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718a6b33041ef85a239f747d43180f27c6f58ec2c094b1b0697e02b4435a7656. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6HN2288322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b813d7fc9bcd8d2d9939cd1c64319521f04d429a2793193919693e0b0b1fda. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6XY2282165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c674364e89c6933294eb55ee8fb467f75a045e5eacdc95309a3a4ec781e0b1f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE5BU2384202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba61da92e4ab2b8445b8c6002eb52b9a8a3860fa24cef84befbc83968568d4. 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/USANG2276977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daac69e338f4e25b53a652d3ba0dcb37826795bcae2170f9fbff66213f72275. 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/SE6HN2348842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89a807ce3376572a50cde45ca65d34f9ec7b144ef0360052ec3b8c3ca94bcfa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6TI2308912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae1b6774b96b0a06b36b25f253fdc9459063bdda1c0ae43e12f08013e0c219f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6SA2398325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d484d38c6a0588de958d8ca672088dc991ee59575d958d9ee5e61b2dafdb76. 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/US3DF2418964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f914f11ba20296e407697d1dbb043d8c9be538d311094cbcaaad9c5cc1411b2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE5752420331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d220e0749c80f642ffa4dd76aa06aa6942f51b3f098b3e2fad7e6c494979268. 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/US3DF2475181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc424885ef122ff786c6d2ebd004116a251ffd19e5639fb024ff046d02ffa2e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE6I32421967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d34d3e776cfde541caa9c935694b94debe270722ec590593e82d6b85acc608. 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/USANG2444621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff8f70caa7b3f522607cf86409f530b4532446b6ef9d9fbfb602eb4bddf0e17. 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/USANG2498980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45de858d6760d6260dbadf7d7dcac4460725dbc5f94c8d765219edb53c5d13. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/SE6XY2535792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ad6a9ffbfb3cdc9627379cf11085122c501823d196c381cc24cc591fa0fe6e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE6SA2571277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d484d38c6a0588de958d8ca672088dc991ee59575d958d9ee5e61b2dafdb76. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2418964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba61da92e4ab2b8445b8c6002eb52b9a8a3860fa24cef84befbc83968568d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2276977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efd129a89ebc40a4d9d281da4acc987b7be4c113fd061121b39a858ccb61da2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMANG2228930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff8f70caa7b3f522607cf86409f530b4532446b6ef9d9fbfb602eb4bddf0e17. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2498980.