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 0x566c952aafc2826a2ebde24703b162f1feca754ae05ce523bbdcc39048c2bfbf. 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/b1ff48de-b27b-45ad-8382-252644c799dc.json and https://artists.proofprofile.net/proofs/artist/b1ff48de-b27b-45ad-8382-252644c799dc.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 0x45ca87a96cb75cf5457b9cbe344ac69f14bb6cb875669f39fa0613fcffd8a294. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:29Z), 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/QZDA82229013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9e8a596944bf5f3678f4dd067bef44eb41d85ebf5cb6a029778c24692d5a2f. 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/QZDA82229014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe969eccfe89343b15bc751b3ca6f3e04cd64b068665467f120202618bb63a47. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA82229015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51e8b0876517b16f448709ca7969e2e36e71bfac95a0a0a96cb27b538a94294. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA82229016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47388767a089a2eb4173303fdf3543b70c6295f418b930850b2aa20cc143a433. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZDA82229017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07c3fb3b9c6694c182cead8ceee5bcc5e2112b7e6998b3cad895243eec90987. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZDA82229020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332ddfd8252565b1e4b46dda502265db51b80ec53b60df31e379c3e86f5661c0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:28:12Z), 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/QZDA82229021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c824d5e430ee04acdbdba56a0c28a3a8c063a1b4bdb9545085b75f2f2e90aa7. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZDA82229023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a66d8196452e038bb7b8d5881e863248d76d9bdf8af01a0cfceba144f9ae716. 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/QZNWX2261686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf135ed7982d08dcb86adb8b417435d4dd044b322c6d61b901322d0a024ee87b1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:02:52Z), 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/QZDA82316139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75659e217bba097af8ce1bb7cce6754aa0302e70736e5edf59f4d7d49d71ac3. 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/QZES82390578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4b37b28556dae79125eb8eca0265d82edfbee41ef14a88bdbf360d2485e733. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6P2356551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe6f818969804987e694210493eeeef501bc4cdf304715f2b1104a43a1c3d0f. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:04:34Z), 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/QZWFP2316445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c685915778da8f6aae17b63e9c290fc9cc723885b66976c236b93859a085599. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:59Z), 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/QZHNB2437940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104d7b03636cd9ff1a2e7fc91ec84b280ce40f923233d7b138451a5808542c80. 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/QZHNC2405450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d36593fa45f92293651315ba37c7d87993801795c5ef04806ccf5e628eafa4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:20:57Z), 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/QZZ7X2470683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a130c5aa32db836f134815d2b232be6d3f1cb827facd35479c6058f6247e66. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6F2539947.