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 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 0x48ee80e399e04476e53c01b3725e7cdadb9a095b2ba526da2863559cdf436c92. 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/28cf3076-cd87-4eb3-8ffa-2ddb3228a592.json and https://artists.proofprofile.net/proofs/artist/28cf3076-cd87-4eb3-8ffa-2ddb3228a592.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 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 0x5843ef3a27c65c3296423096ab4e9b663266d930325727d317492cbe850692d0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLFP2520757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c815585ce89e716a25c03438bcaafcd051d5da48a79314986b95308857bee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLFP2520759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c62698e8ab92c1feeb91baed7f6fa9ddc0d6abc525c8b9e52c3622e95b365d4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBLFP2520761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0dd5d8472fc0863ea358849c3d9d43f8fa6be3830d05a66f6d59e90a530f5a. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GBLFP2520762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d1d4080da2b2a6ddb2f60d36f1284342c2f349dfe2a6ee9c699da5eef2823c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLFP2520763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd24aabc055db920f84ed4ad6e00754ec6f44898e7e7ec47149251e79ff86fab. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBLFP2520765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9555d0af5fbea237495766e4167d5e8874d8641efb0d7ce6d3e3f624dbb8ec50. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBLFP2534189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc056c4a209538eb9ab3fe76d9cc84e7ac0b2a754eb6c9491b66a5bfda6bde14e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GBLFP2534194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f02f52c3a7737ce8a138bf5dd770bb172298ab84bf2da58f663cdde515b2d8c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBMA22507592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e282647045a14982b039054ea779a3b4189c4db514c0df9c5b64f3af6392e9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBMA22507593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d9327ca60b849e44f2d56d38e8492d05cb3f7cf604ce59ea400853f6aa02ca. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBMA22507594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3dee4609b5a344c01edc814e7b036181fa1ccefe8dc11224d8ac546cedc76f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GBMA22507595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8f0b4fd47f493f8743cc81b04d572c02991a719198576298a2967ee95da02e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBMA22507596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8226948bb34846d7d7e95edab7094b4d1294137b2599e6d670968389f71b151a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22507598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc18ac11bb83f9822f15d5c872f5e2caa156ea8dd9045c6a595be5f8fa9e007. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22507599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0710551425bd50616edfa6999ee0779820cccf61d395882849500e3aed2a8c83. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBMA22507600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ee898d83484caeabe591e6b2847b320ba6739e96a669b001017f3eca2e530a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22507601.