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 0x8bfd7a48b6fcc26909a1ed6c9167170e16e6d4c6dd7f9b2a1b36046b5dba8a4c. 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/071097c8-a164-412d-a009-c34ae2f43922.json and https://artists.proofprofile.net/proofs/artist/071097c8-a164-412d-a009-c34ae2f43922.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 0xe8c67873200380a3ace9c9f49143a67aa2d1ef2d4df923525ae1da1251b026b7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLTF1500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c73cba90b64e5e8f246d07b4e25821fc7c17d4d93577cd1d688052034e741c. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/UKEJZ1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b6a90224ae1641d35bc3fe92a7a2efb9f0bb3289e2144a7e528b904d505026. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKEJZ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f5c97768fb6f013d3a87ff0eeb42edd284b772a62f3da3f3191b226af3ee05. 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/UKEJZ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc96563ec7e3ffad0a3e000f7ba2921e79ee62c8da7b10780e525e3cc9775c0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKEJZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b6a90224ae1641d35bc3fe92a7a2efb9f0bb3289e2144a7e528b904d505026. 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/UKEJZ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f85f72aa83c248897664781c7ebe26a69dac262f43417b51ecec9ee331ba9ff. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/UKEJZ2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe496cc97f362a686292abe47d76d8b519623372376dd834ce1fb9a7c350a94f3. 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/GBQLP2400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2f322f64cd2499a585777f39fa6442e50ee412d0ed27be0e2a2a9ce207a6c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USYBL2501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16bbb087cf7ce398190610a706a9b09e59de22ecb77d6a47a8cba02d24c4f4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBQLP2500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb0ce9001549637cc8415b6de5f4cfd586b79ec8779b8105f35e5260a1f43a4. 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/GBBKS2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b775efe2c4f09974d7779bffb25c7682d8f2556c0691bd8e5ce22e813af7ab. 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/GX53U2426579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf985c2c92cd197fa5de708a0e0c29ccdc45b36fb6505fda056f94ad221b0429b. 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/QZVM32200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf985c2c92cd197fa5de708a0e0c29ccdc45b36fb6505fda056f94ad221b0429b. 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/QZVM32200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01343be28ff01b87b145ad5a566c7d39a5dfa8192f77f1f48f3d0feb9f37a52. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFP2422696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbe42cfe4a2389ade5a05afc3261d247ce291e5dbb6be6b9f782a85900b1ca8. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBBKS2000008.