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 0xf045110bd7a9c4e5c253c91fe1205b6fdd8ebdeb5f90c644aff4a831224b1868. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea8bf68e-c3ab-43b4-a882-50adcac08515.json and https://artists.proofprofile.net/proofs/artist/ea8bf68e-c3ab-43b4-a882-50adcac08515.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 0x582f12a8021edaaec0049419dfcfb91b4f7f448c6540ac33c21bcca503076f0c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN92210477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c56dfbaf1001be29dc793cf188409a824149d121082f002af676d64f04ff1f9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEM2215201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90de1c7a9bf5c1b3f1eaf5d76d958fb1b836bc14e4657788ab23e57866aef37. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAT2132852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e6a4560cb5a195a6201dd8dfacc6feb3b10cbd51eb0ef5052c69d9c19b0b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEM2215208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647651eba171f3748944e6b54b71e4ccadfd93c81a82ffaa93073077002c3a24. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZMEM2215200.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a2007fcd5167d2fa82dc259f135e8833b96f0a7fa474535daf297778c7177. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZK6H2262443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9f46527fb9ea171b161549955ab96bdea3d7874d2da986704f5968cf5f9e6f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZFZ42273905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5bc941fb4bd38a35bd1be4f69cca99ad95738f01df74977afc63b7096f3072. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZMEM2215204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54bdd36d9ed301961a80ad2a9e4ac6352c9b56e5bdc75ec59c1f740288dc57. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZK6K2230864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe73071dc07243c91e3829b091ce7906abc5ae85d969cd8878444a5e529b67. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZHN32290142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9929d480a12cd94930f4aa4638964212ce655945c52580291d4d52b8f48df960. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMEM2215209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71deef01a7ef2596b1aedc4311386152b0f9dd2b8c708af89d984e3ea0ca36f0. 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/CHF032396552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c9875b3e7007be55dbf2b74b729dc28bb454dfc4e16e7798792321b0c08ce9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CHF032396915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b322d2d2a09d7621eb3c39b1474f74c70412dce9e7f4c8adeb676421e7b455. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CHF032393114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8856a911d509c795817f21148b4d55aebbcf21306f4a741742a773ebd6e344. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CHF032396917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38f1dbdabcbedab5823d7e99e5aaf96e7b60daf1a5859b7c2bd09e80838d4f0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CHF032396919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce379950debb0c7fb3fc2247b11af5afd5666387f0a270b6c004b278661b4d8. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CHF032396923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7a71d1c007b442f641c8d2e9c07abf9fa57df88ec003efefb3efbc53584f1c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:08:01Z), 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/CH7812414618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ce81459ca4bb4c9702806fa8208b888b7f19a4fedea6be91d5b28f2cdc0ab4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH7812414620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac735bba1cad1614863376457b1cc7f8e792e73cb86ce58f0f719753d79d7cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH7812238792.