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 0xd4e382856764324fa4a4918c3145fd75ef4563db33a5295576741a45c7d56872. 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/dea0a451-1334-4301-b143-18e379e419ac.json and https://artists.proofprofile.net/proofs/artist/dea0a451-1334-4301-b143-18e379e419ac.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 0xfd08b8f4aa3bc22c8f94e801ae15cf3a9a3de7617cece4535e3fb9ebec7d470b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/LBA131903999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f33b07648653949e07bfb27caf7b989c8c539430d16c76cf232d72b957494d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/LBA131904107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ecd8adf68fa7d6d951ba0cc05c96562313c396d571264c9991323126145f2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:13Z), 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/LBA131904164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3236f178e2b16becb2839739597cd7e663913bbf0d7e02bad3e926539dbb6f5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/LBA132001239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13629ca960b1e3cbd487bde3e83a997c16661bd3357d9ab26740fc4ce2e9afc1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:23:55Z), 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/LBA132100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa227683cb0b29b29d4f2f7caa5062d065c30dc4a7518adf942882d51bc6ef424. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/LBA132100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bb06e3e4f2eb4be2d3ff44b0981a335e1624874fe3ed9279748df2d4341b92. 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/LBA132100814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073a0012e8632434159e3ec5c303e72b73e401b54f0ffe98895df8813269dd5c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/LBA132200369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a30a9dc36bc0ed9e1168afd1f6c241d49a74bfcd61fc951d25a26a3ef884c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:47Z), 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/LBA132200633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6710855b4bd3263d1553a89d3aba7a0adaca8ade5b07a16c0921ae392aed8d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:40:54Z), 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/LBA132300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05516f4d9083cc4d5bd83589663b9e87f7e00d754187af26c6075a1d2d44dc90. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/LBA132300870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b86b9bce8a6fe89f36e3f53f4dbfc7f428b4bc56ec2359f353af5a5465b7c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:05Z), 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/LBA132400421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262c2f5033549611ce599e8d6b3161c07262949412206348d486abbdad132bd9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:21:27Z), 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/LBA132400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf725c9696237b304c77de4aa7c96119afec399f8a2141858bfd35a381dd9a40. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:46Z), 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/LBA132500484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14b9505d1e5033257a496cb5b8b905a9b98c8ebce171ab0ef84cc850b77b656. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:38:08Z), 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/LBA132501342.