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 0x6be41428115cca391a11d41c765c6ed5046db6a3b2267ca61d66968bcfcfa6ca. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66762009-fffc-47ba-b73f-5d79425b3900.json and https://artists.proofprofile.net/proofs/artist/66762009-fffc-47ba-b73f-5d79425b3900.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 0xa11c9c74c3114fc2fbe9d4bd0950b20d050e74497183c5066eac97d38bcd96bb. 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/QM3DF2196423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548cd95b0f6952bf17ca08756a0835815610b1411ec1932adca7a19290ea971b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM3DF2196424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf502019e193dd97092f1702f1e2f10947555921f492c48bbb24cfceb2f7430. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM3DF2196427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512e5e56b4772c1ad6335a7fa8b84de32ddbf4f5597be9e5ff132b259ddb2bd0. 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/QM3DF2196428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16f4e0b42507971567307ec41349c70f5fcfe0ebf4655ac09c6cfd5c34f995f. 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/QM3DF2196430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42c3a3e3c7e581bd586490e40e925f69c09a358271c9becfdda518c3802cbe1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM3DF2196431.
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 0xc143fb6c757bf6b6ed6abfa1071d5a994d078ae6e62f971072cbfd4ae4134de6. 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/QM3DF2196425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8032dcc26bd2d73957c02d0db275d0aa205cb46d8314dbfd99996fb71f8be3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM3DF2196426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffdafe9d7f6043df3347fd53ab03c4f080c62afc191282b7325fbd4deaa0bf0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM3DF2196429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff551b5a281270ac25868f5a635058e90cf81d96025918bc287229d8e6b1f637. 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/GX3Q92347692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364cf57877880aec4d1f1e822b8e82942e6b1ba1c083b89d009d6ac2462893ac. 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/USANG2213521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5171eac2efee8fffb7aacf79e941a1782a123e1a18bf01270d5065e48159ffb8. 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/US3DF2269944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710a85f590cef6e011423eb58084d29b6417cf035964208a0c3cb5fd127ca83b. 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/US3DF2269945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a44b95a198bccf7ab6d07dab8fe70d6c9f512e7577f93f237eb719c65e4efc. 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/US3DF2269950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf500dc3767f69b915ca80cbb566fb06e34e27713a635c9d8e806b238c2d935c9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US3DF2269946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7a829023ecc8fd49e8fd6002f0999e1c2599bcde36e5cebc98cb4237fe36f7. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US3DF2269948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac37a0969d6b966b55c8e58316480bff043ae8ea393da65d968a9ab97ea38ff. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/US3DF2269949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086cf14b2d681e9938fc99debc19edfa1f3cc5b95dc02139b3b1606dfc79198b. 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/US3DF2243221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee861413beb7e2f053e54dabcb35441ebc4dffec75e882acc10d4fc377ed6a3b. 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/US3DF2243222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e115210f95b73cb22baab405f7576c9b931a1fb1f5f389b69037de09611b2b. 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/US3DF2243224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7f447e078b5dd3715bb91e32015c01fe8c43ef6b30ddc12cd8ded9366e276f. 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/US3DF2243227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffab45939ebdeb554cec80841f88c5a01caeacecb71dc2f819647671d628df8. 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/US3DF2243228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe663a8f7723002e1a71a9a1c408bf295c0315c6a96de80d7f3ec57966f63381d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US3DF2243223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e803d74ac4412c53835eaafebadd80c889b7bb58c1499e032fda2814a3d136. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUMEV2311667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c731dba36c7cd802ed406439b6681cc177c5bb01903092759024e8e2f60fad3. 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/AUMEV2311674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e76cc67d199ab2fe446fb0fd84be2299ec7a19f5adfdd78ddb0d17a021f0e52. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/AUMEV2311677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21425cac60745f18a2ee41101de97d20969804be96d4d35447a26476e9098c40. 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/AUMEV2311731.