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 0x72401d0b4c1929f944bb4520492aba4b40ae6f7abec03390654ccf2fc9641f20. 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/3b48ba07-ea35-406f-90f1-786b9472fcf7.json and https://artists.proofprofile.net/proofs/artist/3b48ba07-ea35-406f-90f1-786b9472fcf7.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 0x29c95222bb26ab51df3ecacb5dbd55232d7a7443a54f2f47f187745359d52dbb. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZES61893558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b283406d4f66e1a82e6b9844077968181fef37319d04a631497a459d5a57068. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX202292062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf590b3d672711beea78a45215d1f3c19a75aed763b5af2204d43ef74a7bd341. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZES61896479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9fa9f79096091a9734cf81338ed2edd60072f88ab85cdb2c99b35198277cb7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES61896482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f95ee01f917f429683fdf6fafe0f888217baee47a7885667676d73f15c732b7. 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/QZES61896483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cdd138bcf66d598c1b1c9b833bfa0367e0b423e729320baf0e5e4a9cc4c8d9. 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/QZES61896486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebeac24fba6606ace150c486fcf37040750d7cd4cbab55c332a019edfbd127a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES61896487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e223f324432f95a3498d34f4abac8c8a6a8008a349ca735b41f756297e61824. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZES61896489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468fcd1abed399ab8e25baaf8db15990d635b7bfd2d330d7d99d6efae3eb0569. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZBRF1824048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b0b53320daf2689970bc15009a346036838690af4d0660a6fd743ca4faf96c. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QM42K1871518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5212d7f61b90e204fc19f17b7055192b7af65075539be346fbc28c9dda8be9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM42K1880220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb322bdbba807898b7c0a22d3ce033ad3cfadbb5642735cf7b83b57f1af869d09. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QM42K1862898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb01d1042bd1bf11c5fff51c5b82180d194802707187a6ee9d0fe095cd50d5be. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZES51879725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78376028c4514c55648bbbe2e8db9258e781993e3c7652b7e002d7f6aa060410. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZES51879726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd185ceefe4dc832f899b6955019aaaa209ef08a0041de40620177979a11665ad. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZBRF1824928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb69caecf3875c743bae59925564e29d89fbc75f2fa267701d3f4ec88447394. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES61898232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08fdd1f7657cc77790b541b9b1f62c7efc6660f2ad6c5bd550723c4553a964b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZFZ61919818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acd1adca9af1d88bd13ae0987a4d9c3a04797a6bb85b739739515f94c41447a. 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/QZFZ61919821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e6977be2b540dad2e2b392cbc259d42219c04538fb84f078b0f89015fdd5ef. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZFZ61919822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62ac249e6abb4703a46adc98847af899bc62241634efe78625057c8cab5bec9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ42138173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67b05baf98cce3d9a3e6fcc06d286546734b2e67ae3705e289075124bf1efae. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/NLRD52014036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96ffe773f1d8748ad97a86781f9a04f2bd6e9156df4514aef03aa5ebb2911f7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/NLRD52014030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b064bfc30e341fb1ae3929fc803753d06dcdb472cece6edd8ebba6f524bf4c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLRD52014031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1f2f5606e3001e5bba42992fe86435a3d40c9369c36eb7b9581438fd3d9667. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLRD52014034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b59f4fbda1192030df1259b49e2826938ceced8bb89e4db64099b73d348b0d4. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/NLRD52014037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ef2ace64c06229c9a1235d8ae435e973e5aeac4d75d484d5cda025e03ea6a5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZES51841124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee24edc34f6f89cb9a95e670b862b886e9d6a6bba23d186a97b7e19dd3dcb4eb. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM42K1938594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc63ae80d8f721cc6eac5293218abbdf2d266e27906a5a566e9d0db3a427f39. 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/QZES61893554.