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 0x3d3625356aa4dc90ed600dfaca96a4599e2d0504960dc3432d717a4224a469e3. 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/0a25b000-bda0-4693-82f6-870520c0b805.json and https://artists.proofprofile.net/proofs/artist/0a25b000-bda0-4693-82f6-870520c0b805.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 0x955991f6aa626f18925e9a81795c0c8f92247e46bf45b4466cb4a1da72a899a8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:33Z), 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/ES5590700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22712a7e67726fabfb687af9966e7e40279a79089f39e812cb0e024e11af81e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES5590700270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9772408454d397c94bce440d1df79a4c2ef4cc2ddbdea0eff565a13ab5757cd1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5590700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bd114f233ba745a06245e604d4891e12c731dfb49bab79681b55a78445e2da. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:28Z), 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/ES5590700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925526ba8a63e932dc6219c78f6b6f1635fab3e5f8160665288cff0ca4a6926. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5590700217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9964df282963aeac52723f8cb15724425889b468f3f26035c6376bfa9c3c2bf5. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:08Z), 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/ES5590700218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d102133c63b5247fa87ceee8fd90de8fedeaa2c2954c04d9b1b3349926fd25. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:51Z), 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/ES5590700248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f92fdde62ae52ac17be280d96f77422b60f45b0177ae167b8433a10f2f83aca. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES5590700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e059e7c5d65905da161ace647e1e0bbe60f8df1a4c624116da2d31447818a6e. 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/ES5590700226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee49fab8dd0588f39f4c401cfbbb575aeaa831fec950ffa61d510e8877f1e4ac. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:53Z), 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/ES5591700238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce1eec278005a23c5ce4ac9496859f34804b90b008b29d6bb0cde81933b88c5. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/ES5591700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cd28da7c862acc2390066721661e41a22611c8069b10beafd6e4d3ebb7b7c6. 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/ES64E2304936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4c72d0d22ede13a3d97327880cd8a21c8b2898486dbffbee4dd4f7258dba0f. 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/ES5591200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3de34a3ea0fbef69a49f12290002e5fce5e0da6831d18291dad59228ba780c. 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/ES5591200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea1de9ab86b4034e6b76c9cf1922716f7681ed8d128b252b515b971a8c37bc5. 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/ES5591200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15554c1eadc27a38cb2421dce3f1ebc80f32355d71c7cbd7e24c8a3869b0ba7. 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/ES5591200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89e76d4f0f9623b73a133a43c63619d40c553d6128d4a75b191efa427e4893. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES5591200149.
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