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 0x66cf78b429cf84f2e8791073a75f3663f5d309a9e038e7c2a336f782c3057ed1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe89a91d-e152-414c-8b6e-bb9ef387b531.json and https://artists.proofprofile.net/proofs/artist/fe89a91d-e152-414c-8b6e-bb9ef387b531.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 0xdbaeb5c8b533895b3373b7aa45f98d7fab1cc5dfabd0c42b898edd278086edfb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAII2440507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd3f0a51fcb3e7cfa05956a1262ef483e160838ef4704989dbbf77d2f518dd2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:50:29Z), 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/TCAIM2403891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d487f0f0f16509fc56723779971ed77f88964e6ddba8706421b9ccde3168088. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIM2465548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bc34441b6f433fcbe053143d867758b65e261652a36b600fcbdb158f5c37ae. 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/TCAIM2486276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed6883ed4e65f823aedcb26cbc113194619d206c6e4f98e80f47d05a399abed. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIN2405752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5c88d5c3b9c10d2ea61835509c19b6ce7262ae4c1282bbea06e702139c5a09. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAIO2435556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a334cc83d7e1a071d7e5207ceeb56c1ee2524b91668b73224b08f9dd64274f1. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAIO2436001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10171ee1d25580ba697612257951ae007e789d49acf7e244ca9bed0d439425b. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAIP2405096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c988105075b4c1b8fbda9c4a0ecc7e294484fbb6ee7ffd52634537151431b8b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:06Z), 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/QZPJ32393592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc181013aab711570830a140e5d05285bb8543d72216eb02a6cdc2a50fa87f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZPJ32400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24efedbd7a0c20eb6ee6e688f6c61a953be871ee52be800ee8cffebb24a505f. 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/QZPJ32491745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f8497d03d7c60d4b0b3abc5d7f0db88d39e2b962d0c9d9a9cfd0dd3c57bb0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZPJ32500371.