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 0x616523e3a359e27c487167bd8df53e390628ce9f7c7140667dce938c1c19552b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5125693-f30e-4562-85b0-c7c9e06e9ffd.json and https://artists.proofprofile.net/proofs/artist/e5125693-f30e-4562-85b0-c7c9e06e9ffd.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 0xe33a54750f652d3683e4008e09fbe3d8a4fa8dbf6287b5637b17d29939c7e489. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRKO12300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1fccd54d1625ad2e18bd9af6501b3d017c63ac37046e13a58ac1ed12e9dbb. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BC1GV2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c94ec14a52de5ad02b5cb48e7f7e0e59aac3c1d360eec6043564e8ecac6b3e2. 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/BXJK02300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e4df76ef6370d6288d94f4f99e1312a7aefe2c4316c26bb605e9acaaa00633. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRQP72300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7296d84a25b840035b6ebfea874ec532afe658cb08482cf8eec53b6a70b693c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXJK02300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc487a88753c3aec8924c4cd4e650a38761c80bad5d8188c467b39666faa141. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c6ef02930a81ac81ca9f7f5003451e53ca46580b4db595dcaca68604e9bfdd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf6b4ec623e5e551dc9799f2b32136f9f192d09d83441acfa9e9acffee069b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXHP12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a1ad212da596aad89314df42822ac6ae8a9c606954992be09c7aa3bb1eba2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXHP12300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545b20c90684abcd0cffabfc613b449c11c359dd9c9f1a76378c3369fa874cd2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXHP12300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1cf1486316797f0cd4826f321cafb4c5024e789ff1dce3530ceefb876b9f68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXHP12300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42509430f6f9aea07fa0d39e28f4c6da0900d8f60ef8a9dbfd4e821be47300ad. 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/BXHP12300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbe0bbefd813ad95c752f5e3d6269595a9d1c68285668cad35ef92cd805b9f8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXHP12300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09781de977476ef6ea53c640337199d480d038102ff28cb4828bd5b239f671e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXJK02500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f582b4fbcd0a4ab0ebc05d0c13748c540d62c452ddbb7f28168363f297159c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKNCV2500012.