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 0x41e9fcf6defcf7dfbbcb5b1f37165f5ab723eef0756aca7d80b69df53f8525a2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5185efa7-3c17-4a70-956e-1beb3e2f2663.json and https://artists.proofprofile.net/proofs/artist/5185efa7-3c17-4a70-956e-1beb3e2f2663.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 0x03338bd6549443630a854141c37c6e8eaa115db6a076c22843ddbcabcf0a9a56. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEAS31100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d08db503d62988b038fb742def49789ce05d323f1bdaf21b379f3d07552012. 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/DEAS31100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc6eff480b549c733bc3868b3e16615d9acedfc11b40fe3d90acad6b1c209c9. 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/DEAS31100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448214c6b5babf13716a16cf03b03b35d83127db031580a783bae020194a7882. 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/DEAS31100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63006f8f3bb6eebbfa60a1f25b721d6d3c1201768eb3c50a4e0e0a1623240c7b. 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/DEAS31100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbce6da33856f3dc8d81aa13d5f274e2ec411a94569af7f99f3207f3a84486b. 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/DEAS31100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa401151277db4414a9339593d30e9cdb21bf28b10561cebe4eac8a5aabcd5cb0. 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/DEAS31100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca4775c4707146c6ae26eb3ea1b79890fa21eee5a2fc50f4691176ad46741bd. 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/DEAS31100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ef3908f2a5e374e5ccbd3947e17817806fed24836d727eba297b16dd3a48a1. 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/DEAS31100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5234fc7c9c263eec3ff487c3428ebb9c37de25e8c7239ddf1564c6a6acaf1e7a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEAS31100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa7b350b5d844729c8513ec24a402f9a711c3e7c7ff4fb83e1e91af60836b76. 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/DEW921300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f63a83a5b81791a01fb8e5e2d87d6d6a91495c1af7201f9a2a970ab7ef9b25d. 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/DEW921300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a654ada4b12e1457c0a7c20e3cd53c61458161fbe5b24e0a1bf5135870fc645. 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/DEW921300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da972496138e224e081246c3ac30ac29c10bc7f0bd6f342f6aa2c5158cf826d. 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/DEW921300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad48dc25ff9e4a62b027c5700554635d3d9bd2f74b41900ba25c27b8295e2578. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEW921300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c805dcc7dedad9a6a719c75dafc1d9fdda457253eb4269e99f20fec41ab76. 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/DEW921300247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdec96e6e34d173ea09d68a7b781c61fe6a7535fe822f4c2ad5d6c79a351fbf. 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/DEW921300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9066c23b499f177cc469659ce3913f183f2e5d213428d1ccdfb499f4c3879f. 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/DEW921300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd47067839a281ba1da1fe815df3937a845fa0f12cf4e53bfe58bf11de08e14. 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/DEW921300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d98e2d42052d3e98f4601497ccdb7d75889b1b65b0377837b8dac5277806c6d. 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/DEW921300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7601c69200a5e3c3b943bbbfc8547fab6a484ca87bdde1516a5ea29fa9a7d7c4. 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/DEW921300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691d950f006ef2afe7c69c720434ab51eca6b733a56fcb06d6d1813ee442224. 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/DEW921300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10354255dc400725187a7db2545589b81c5702c1452f0cfc8131bdb5953dd5a. 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/DEW921300256.