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 0xa046bb0b23270710a89f7c5a727a05cdc0adf7c0ea5d3d31b8d1b29b8aba533d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f436593c-2652-4790-9c0e-3acd3a7bcfc9.json and https://artists.proofprofile.net/proofs/artist/f436593c-2652-4790-9c0e-3acd3a7bcfc9.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 0x3c57a07d3d1526bdd4bdd8a3bcbf45494c0276d6262ef244178719a40b831a8b. 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/QMDPP2101250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03fb38dcb9c858b598a4df6618db77b8a688add825d08aaf53af04562a28afa. 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/QMDPP2101251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78bccd0bcb2daaeb6267bf9777594e2f6f9a1f407a068edbdb613e73963b03b. 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/QMDPP1700539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798e1a9f1ee232e4e409fcf1196cb99753ce10af977c9f4a11780b090a0a3880. 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/QMDPP2101252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f18aca5081c5eea5b8003874aaa332015a06099da82644d07d2d1e8a6b0637. 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/QMDPP1400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed8ed494b7efdd4056739ac4baedf1fa772cad480aa569c10297b4094aca1a2. 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/QMDPP2101253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a689489f1fa6456efe9b7ce3fca639afe0d862114d066d7586176f545871f2. 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/QMDPP2001109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964ec7e63efb5e4429b513a64414a9509f64f9922748e35cd4b9984a76daead0. 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/QMDPP2101260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c477186f836649b913d85d60f051443009651a05a6332e6dae46c39183d6141. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QMDPP2101254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e1afdf1ca16034c4886fee94d965d49f4e61f4cdb216fd5cdd03ca7feaa3d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDPP2101255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5311bbb0d89c7edb7c95986fb8040692f1b3f2bbf0904a18a97f8a99996afe. 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/QMDPP2101257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a81d3dfdb6ce4e7095475d93299dd9aabdcda7383b1c840e6cda9c87bbfdc8. 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/QMDPP2101258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc16e92d74d58b0c4abafd8f6964e9d569806b2b4f588ea3177df90dc027a2dc. 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/QMDPP2101259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25847efead5dac76eb4d34b2a4e465433c25e93b4c32fe519eda4acc73fbc1b. 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/QZ5AB2489515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a786309e59b9b1ffde0209794cf5f87fc2e1e056bc56aa76b5c480442de8473. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9L2367373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74543d9e86683a73f9f8084517e69f52c0296a4a26b33117e95ada35bd48a40. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDPP2201583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2146e55ce3b5ae40029ab4cf4777fc3b7ee9296cbb3c6ecf606d57188022ed. 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/QMDPP2201471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b0c65528e1a7cf0e1750194d2ec086b2e7b3a817e143d157d46ee691915bb7. 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/QMDPP2101243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808d17ca6346b77c45b9770e48d22d0c8b568b02c9b71b18d5e3c7bccf6a9a47. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMDPP2101241.
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 0x1b79277f01ae74f3b834ab2dcf95fb6141e969c04c792e452b1e6e26e9546cfa. 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/QMDPP2101261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b2717a1d34f8a47bc39dbd30d7f82710ae49702683d040d01a4858ca8bb7c5. 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/QMDPP2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdbe482be7ef194b0eede7831a8c3e9825db509267c3ed5c2fe97865cbcb002. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:47:32Z), 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/QMDPP2101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5274e67b6ffc09fdcd744508d8c6750c974eaa1abc9b4655e007a175810834c1. 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/QMDPP2101439.