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 0xf00b2f51abe0d1540c9e1e8576358487943004325f6ad4440d4988dc754c3e3f. 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/4cab0aa1-6c71-4106-bb2b-5b45877f390e.json and https://artists.proofprofile.net/proofs/artist/4cab0aa1-6c71-4106-bb2b-5b45877f390e.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 0xb6618edf0bab2148a2601de045674331081217dababb7433ede0a6218714a420. 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/BXKG22401065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0460326d20e60c7348e4e4d160901525dc907d8c0469e3abd77fe017f5d46ba9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5909035908ce88fa887b67135e32acf746578467aaf308dd1cf801c4351bb076. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce20a0cfb9d184538ff545ef4e1f29c340bafa14ad7dfd1a4a4fe122d71df3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18746c75fa4b8f04a3405c99712d67ef7337a811c4183a2c2885235c6132c1f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aba10d530dc780c769609561faa4a7bbb4c0c09c49ddbebb4c6864fb72faf9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf29195a55fcd3b8171a0bdb61e32625d05dc054988376bc07db6dbc9e741b9c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f66490652b26a2e3b2eaac947ae122dc273404b2012d5b398a654fe338c083. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0b06416dfa1146d1c2a70049a9318699cd385717c13951d383aa42a622e44b. 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/BK4442400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d69cc384320f95c87adcb7ccf33cab07c72c1b9a07789a0a0daf7cad158ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35764496faf1a6f644daadaadf28193a4a5ccc5e742eddb5ddd19e6d4dc5c5af. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c99ac3fc12c44f4944eb68468c79a5650236061e4cfcf5806005be037be5b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4442400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf754ec259e2648a36b25d6423c95e70c58bbefdb86b427ee98a19be6709b5cc1. 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/BK4442400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c36ba473f0790443a217c74b76603c702fe612de52faa7bef6a202ef9e2f961. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXG6R2300792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b377645a8787c00489f8f63aa4f778467b54092e2614861a2298c0877dd58c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX7P32300676.