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 0xf485e5f85596ba4b9c7eca9b30314ab669ee21d23df38dcfd44a32fe3332425d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d96d980e-5a2a-48d4-8d81-98d9bd3fd022.json and https://artists.proofprofile.net/proofs/artist/d96d980e-5a2a-48d4-8d81-98d9bd3fd022.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 0xd0977d546cd8588917dbef37d5fb571d5a220d6cc58c52e093be8da7669f9a16. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6L2245842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faf72ca46b143644699e9703300f228198acfe3af29ba582c81bbe0b2a64c12. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZK6L2245844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e516ca40c4f352a46a13cb2270ab3cb6204833cd9e25ee2abe9a70b84a7a71. 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/QZK6L2245846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639450c2bf5aa6b123688c98b4949e7db39bd78029c54903b91ec3ea76c3a219. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:56:02Z), 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/QZK6H2274767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1090a4d0a90428ecab1219bcdcb53ef5f60508b9f8b6ada6fdbf0988ea300c. 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/QZK6H2274769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a83529ef9456a50acac3818d892cda2d8518d508ab0ecc4618bc24fa1d6ec4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6H2274770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0266a1ec9a03c414a14fe715be0857897b19274ae9e4d47ed62e475058b0e86. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:14:20Z), 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/QZK6H2274772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539a85677ee6ad6c5933147f04527309e6e705d2f52a25823e4b66e30dd0ab97. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZK6H2274773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5f96bd7dca6e74c5a8cea4489b735dfc6e766cb4744d5feb5e1ff7e41a03f6. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZMEQ2255211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d621dab66f8d23924128cbb07a4b42da79bbe2f74c6062259bd564bcdd903d. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZFZ22379699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c9896191348d1c4ee6e8c341d6cc6e3237d45921d101a236d911deb50dd11f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:03Z), 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/QZFZ22379701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ed92711d557da0e0e0330583d1aa62db5822eed617be7d9bd0338cf74c3710. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFZ22379704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ddd3c60f4cc9d4a2b044e0d382807af214fc23d2ad934769506cc54cf033ce. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:00:28Z), 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/QZMEM2302759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c75c9c1cdf824645dee13601a4c020e1219ca7974d734a0f054a86f1d9e123. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:58Z), 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/QZPEW2444781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0984e2df21e4e5d93a119e938d3081e53b7e6aedea85e053f505dd527b45ef47. 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/QZPEW2444782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267060741034a0b1984dd05114ea9b9860dbb5f7485578e853463122562dc6f6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:26Z), 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/QZPEW2444783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc371880b9036f332961a15479c1a6482c374a51b05b82cce85934dd4cf54dd. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:44:45Z), 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/QZPEW2444784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ac851cee3b61430b2e1053f7c5b25638755fb9057b4d196fa653a7e9a6b05a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZPEW2444790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ab65d02173c8280d0f6befed98b33b7f8e0ea3c02b0be6f6c88b2b2ad3204c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:20Z), 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/QZPEW2444792.