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 0xa29af59816acfa2fc8d79f34a72ad22031a6cd228cb31eec1946d262118f7bbe. 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/23f8f943-b036-41e2-8323-2cf617a60968.json and https://artists.proofprofile.net/proofs/artist/23f8f943-b036-41e2-8323-2cf617a60968.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 0x53a27d8b2bc13defe8e56335378df1b54cb8bc9a7512e7dbca749f8aea2b56ed. 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/NLL6R1700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a87a2f27821ff65d18925fce2d77ed8c0b888761593cea5a9816b4f5dfee3fe. 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/NLL6R1700112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6ce7ec8792c377388e95d56ce22f8724f5589899f99b806450f1ef7582d3ed. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLL6R1700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb468b94d4706247a24de583b1882b7265fe46aa1ffb1687e2e750fbd1fa6e937. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLL6R1700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b019508d73a65c61f16bd59c2b4c576bbf4c854d0bfc279a4643803b6c1f22. 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/NLL6R1700115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf297481e3ff3254d1884b8c2cc2f33493dc335e84c96b452c18069deadfb25ac. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLL6R1700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1175cac837e5f68000aa93a5043ac25cd1e3f06ee8db4a9780e8c313568f1c82. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLL6R1700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1675eb168cb631c79f0488b697aa352427cf0c1552dca51ba3c4716527c8b5. 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/NLL6R1700118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995fabfa45109f789fbe15bbb3d3d12f87f5412dd8410d5f63b2e860bca36d4d. 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/NLL6R1700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4686b46618def3b187a6789d8eb36ccf170d859a6497db62411b715b71baa0. 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/NLL6R1700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2dcd21723a6bf1b931a9610e7bd594756506d6e994605264c96b33248498ef. 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/NLL6R1700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d60bf241c32539fcae52c56eec17504afe7d2260ca3f5a1ad11886451e1adad. 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/NLL6R1700123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3231183d50b833815e73d55b5f7cc617a3fc9f99d66e1a2bc102f1d887b435d9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLL6R1700124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f0f008704d592f130feae5a35352056d6fc62867c798e268b2d675f616aa07. 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/NLL6R1700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01c5271832a379faf7c115e258ce2251c3112468b7d4f4e37eea4143ec2f276. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLL6R1700126.
A Change in Me - Uit 'Beauty and the Beast'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e9880fc8edc2133c644e0ad139dc5889ca42734247634086242a60b922a14d. 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/NLL6R1700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa250616c375cc2cd83db0399a01270528106ee8b18a815ac8af5b16bd7b14bc3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLL6R1700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60d230f3d5097f92d93f4f54a26ef80306d737db14d061774359be1f5dfd870. 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/NLL6R1700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a47123f69b25f0c11026d502372b7c409b3f8c3d8b2ee385147d474c8a6d33. 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/NLL6R1700130.