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 0xb1151a9e50e9e0540153cf32f3872af62b959e5141e0134e69c344c6a7e45198. 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/e8b81f57-3cc5-42c5-943b-b2bfa9fc76aa.json and https://artists.proofprofile.net/proofs/artist/e8b81f57-3cc5-42c5-943b-b2bfa9fc76aa.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 0x05dfde01119346b24400ae84983c1d184218e89c3b8c0001ac03cc7e1f5954f7. 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/INA431104288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca538ce957bef966bd058959360f331403a30ead89daf90c83fb87cd82747276. 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/INA431104289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc459a8c4414bbbd1dc630218d33e1efe739442690e6696b732715ee25662294a. 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/INA431103942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e58c1f42b7d7aead1c1f63e68b48396f7f73461ac69851a5d103369cbfd3bfc. 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/INA431103943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cff9de8bae3cbb1aa6864fab1a71555dec308252007c620e367ae4bc52ad80e. 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/INA431103945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0db1c18ab4200782664cd4065cee90617d655340ab773f8f3239fff11b34b5. 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/INA431103946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40457b0a07a60253ad69be9a74ec388c4cca9628c75303932ef0af06d8ae255e. 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/INA431103953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce34e0d6cc5b58dc37e2e87acbc711685fdc84b81e2f6c8ecfc3a54ef8482101. 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/INA431103954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a939649e416e7340f3ad34e627fe71aa4fe626b8349d1ae7dd45b66a0dfa60. 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/INA431103955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebffe145588d98855befea983bf0ba8b662edfb6173803e8dd65e6e6b05e3617. 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/INA431103957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d850a593bf397be4a2b83f53ee855fde6ab7faeac2aabda3a71436f8b34807. 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/INA431103959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30fdd084f6ff240520242d14ba529a931eb2bad741e223953f87ed66827ddec. 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/INA431103960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8cd9eaa17380c21bbf924bd4945ce00eebd0996224d36640212376218b385c. 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/INA431103961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6a72b0e028a4a808ded85445f52c4b20d12cc8045b2d3a24d2e8648fc923ca. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/INA431103941.
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 0x6f7f613c338b02c99c71efc74c9a3db1173bb7c0a195650c57ffeece5977eb4f. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/INA431103944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f8006811f38a86302999618d6028324c8b179a499318440e2bdf662c81ad85. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/INA431103947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef4546bca513fe3a6064a44def8fd98e27077ca9e52542872043d131bf717c0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/INA431103948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcfe9b2409993cdf2d6e5a9726f4cdd77845518735042c144bccb1de064c3fa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/INA431103949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c7488db2c9431004c0ced7bba39b380a8b211ed7fcbb3da6cf5bbf7a36bc2a. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/INA431103950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72b4a4fd0cddebd525e5e6ba0ce36bfce3ad4c83db965cf70c8b7e1f502c7d5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/INA431103951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0379bb6640011c6719d3d0d1939a0e56caffedbe54ca329c91e7206b321a5d4. 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/INA431103952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921bbb1a17f8a453d896cc1cd66f078a12756cd8ac781507e0d8701f8e6000be. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/INA431103956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8507075f5d9044cebfa3958b49472877b74fccfad648104be675c7c1e88f68. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/INA431103958.