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 0x592dac81c4164b8ea0c822f19e07ba1ce55f348eab31c897c3bd3d6d2b85a869. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/678968d6-e43a-418e-8199-4771ad5146c6.json and https://artists.proofprofile.net/proofs/artist/678968d6-e43a-418e-8199-4771ad5146c6.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 0x4fd588c0440a3261e652a40c0d48c5bc7bb321cdb2d62cc14688980c7b2aa076. 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/GBMJG1812794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755bf37b74cda10b62227a4c71fad34814d3c99f5d075fe67546da35cddf4b19. 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/GBMJG1812796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60ed83f7a4d99b1be1e4a4333cb654e11882d7626e20b254a5f6871dbfee908. 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/GBMJG1812797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbee075ff9cdffb728108bdef1b489fa02afd2b582677eab6fec1dc58ec22cd. 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/GBMJG1812798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1a913f8c5b996a84f4a8a40b7bee7d7190b227d77a539f42ac9f4d5bc8d6fe. 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/GBMJG1812799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302dd57a4c72377db49e71ceff039974829f9de8c29b704044b3baafa81bf52c. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GBMJG1812800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa9e0ae2d73aca934c6950b9024865af11d4c1c5067cf9adbe22f2aa59d557e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBMJG1812801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef71c0885e1c794ac94b9bb0f802dc44b6837a16895d9aeadd3369e0227815c5. 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/GBMJG1812803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82b71ae00bbf6eae685041d7b1752817017ef4465ae744ffeb0dc14303b49ee. 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/GBMJG1812806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a891a840fcc2d2ea1391cc356a409e35f833e9494d2588fa96e3b13916125d. 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/GBMJG1812808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef45bf1bfe648117d40fa2ff374fa422470fcb640f193f83f5a2fd3a48dbae. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/GBMJG1812813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff21f020343fc6d40bb1a5b0fd68ac334aa4e4a3f9dc6cb2e44bd0ec7b7f314. 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/GBMJG1812814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5579e12387dc70de04f457b50074266578c7e010c05a80a0b59581144825fa79. 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/GBMJG1812815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc04c6fbc3a037f673afaddba57cee6eb0c8031066fc7230d809bbc622286b01. 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/NLAL61804001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dc93649e3c90dc84b3c8fce0f8a13bb52ac58ee73546a680747ce87a962545. 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/GBMJG1812820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85a024cc61e202d16cb15805d59e92bb4655d924897eac7ae0e2ef108227f37. 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/GBMJG1812821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb595bb2e040f888d28e7c30c122d01e1d8d466f58c922d31945d078b61459bad. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBMJG1812822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b9593c74867a0b336a0b7eebff6fc4e89f5c1c5485fd2b39c1863da6f7def. 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/GBMJG1812824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd52e0ea44e2533017ae0631ec69aa22ce9e32cd564d93dbe87bea965fa6be3a. 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/QZNWY2331086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30930d5dfd66d0ae97ca47cb53de177d7ae365f522cafe439eb59b1e056ce3ff. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QM2PV1516188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ca28e1951613706e78a8b1de6cf0b1f9073360562df4623ddfa1290e624a54. 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/QM2PV1516189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86beebcaf46cc76b4a2efd2977ebb1701f41ca2b9a25175e6a80441622a64a7. 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/QM2PV1516192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8907167b3149af13d9ea42c507cc7580cf065b98278f3b29c5f9d650b29c1a71. 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/QM2PV1516197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ec916eaccd173ba41b12a5e097c877876f8f185981b5e46579d54a94f5fc79. 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/QMPKX1407911.